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*) Ensure that the session ID context of an SSL is updated when its
SSL_CTX is updated via SSL_set_SSL_CTX.
The session ID context is typically set from the parent SSL_CTX,
and can vary with the CTX.
[Adam Langley]
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*) Fix various certificate fingerprint issues.
By using non-DER or invalid encodings outside the signed portion of a
certificate the fingerprint can be changed without breaking the signature.
Although no details of the signed portion of the certificate can be changed
this can cause problems with some applications: e.g. those using the
certificate fingerprint for blacklists.
1. Reject signatures with non zero unused bits.
If the BIT STRING containing the signature has non zero unused bits reject
the signature. All current signature algorithms require zero unused bits.
2. Check certificate algorithm consistency.
Check the AlgorithmIdentifier inside TBS matches the one in the
certificate signature. NB: this will result in signature failure
errors for some broken certificates.
Thanks to Konrad Kraszewski from Google for reporting this issue.
3. Check DSA/ECDSA signatures use DER.
Reencode DSA/ECDSA signatures and compare with the original received
signature. Return an error if there is a mismatch.
This will reject various cases including garbage after signature
(thanks to Antti Karjalainen and Tuomo Untinen from the Codenomicon CROSS
program for discovering this case) and use of BER or invalid ASN.1 INTEGERs
(negative or with leading zeroes).
Further analysis was conducted and fixes were developed by Stephen Henson
of the OpenSSL core team.
(CVE-2014-8275)
[Steve Henson]
*) Correct Bignum squaring. Bignum squaring (BN_sqr) may produce incorrect
results on some platforms, including x86_64. This bug occurs at random
with a very low probability, and is not known to be exploitable in any
way, though its exact impact is difficult to determine. Thanks to Pieter
Wuille (Blockstream) who reported this issue and also suggested an initial
fix. Further analysis was conducted by the OpenSSL development team and
Adam Langley of Google. The final fix was developed by Andy Polyakov of
the OpenSSL core team.
(CVE-2014-3570)
[Andy Polyakov]
*) Do not resume sessions on the server if the negotiated protocol
version does not match the session's version. Resuming with a different
version, while not strictly forbidden by the RFC, is of questionable
sanity and breaks all known clients.
*) Tighten handling of the ChangeCipherSpec (CCS) message: reject
early CCS messages during renegotiation. (Note that because
renegotiation is encrypted, this early CCS was not exploitable.)
*) Tighten client-side session ticket handling during renegotiation:
ensure that the client only accepts a session ticket if the server sends
the extension anew in the ServerHello. Previously, a TLS client would
reuse the old extension state and thus accept a session ticket if one was
announced in the initial ServerHello.
Similarly, ensure that the client requires a session ticket if one
was advertised in the ServerHello. Previously, a TLS client would
ignore a missing NewSessionTicket message.
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Changes between 1.0.1i and 1.0.1j [15 Oct 2014]
*) SRTP Memory Leak.
A flaw in the DTLS SRTP extension parsing code allows an attacker, who
sends a carefully crafted handshake message, to cause OpenSSL to fail
to free up to 64k of memory causing a memory leak. This could be
exploited in a Denial Of Service attack. This issue affects OpenSSL
1.0.1 server implementations for both SSL/TLS and DTLS regardless of
whether SRTP is used or configured. Implementations of OpenSSL that
have been compiled with OPENSSL_NO_SRTP defined are not affected.
The fix was developed by the OpenSSL team.
(CVE-2014-3513)
[OpenSSL team]
*) Session Ticket Memory Leak.
When an OpenSSL SSL/TLS/DTLS server receives a session ticket the
integrity of that ticket is first verified. In the event of a session
ticket integrity check failing, OpenSSL will fail to free memory
causing a memory leak. By sending a large number of invalid session
tickets an attacker could exploit this issue in a Denial Of Service
attack.
(CVE-2014-3567)
[Steve Henson]
*) Build option no-ssl3 is incomplete.
When OpenSSL is configured with "no-ssl3" as a build option, servers
could accept and complete a SSL 3.0 handshake, and clients could be
configured to send them.
(CVE-2014-3568)
[Akamai and the OpenSSL team]
*) Add support for TLS_FALLBACK_SCSV.
Client applications doing fallback retries should call
SSL_set_mode(s, SSL_MODE_SEND_FALLBACK_SCSV).
(CVE-2014-3566)
[Adam Langley, Bodo Moeller]
*) Add additional DigestInfo checks.
Reencode DigestInto in DER and check against the original when
verifying RSA signature: this will reject any improperly encoded
DigestInfo structures.
Note: this is a precautionary measure and no attacks are currently known.
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Changes between 1.0.1h and 1.0.1i [6 Aug 2014]
*) Fix SRP buffer overrun vulnerability. Invalid parameters passed to the
SRP code can be overrun an internal buffer. Add sanity check that
g, A, B < N to SRP code.
Thanks to Sean Devlin and Watson Ladd of Cryptography Services, NCC
Group for discovering this issue.
(CVE-2014-3512)
[Steve Henson]
*) A flaw in the OpenSSL SSL/TLS server code causes the server to negotiate
TLS 1.0 instead of higher protocol versions when the ClientHello message
is badly fragmented. This allows a man-in-the-middle attacker to force a
downgrade to TLS 1.0 even if both the server and the client support a
higher protocol version, by modifying the client's TLS records.
Thanks to David Benjamin and Adam Langley (Google) for discovering and
researching this issue.
(CVE-2014-3511)
[David Benjamin]
*) OpenSSL DTLS clients enabling anonymous (EC)DH ciphersuites are subject
to a denial of service attack. A malicious server can crash the client
with a null pointer dereference (read) by specifying an anonymous (EC)DH
ciphersuite and sending carefully crafted handshake messages.
Thanks to Felix Gröbert (Google) for discovering and researching this
issue.
(CVE-2014-3510)
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*) By sending carefully crafted DTLS packets an attacker could cause openssl
to leak memory. This can be exploited through a Denial of Service attack.
Thanks to Adam Langley for discovering and researching this issue.
(CVE-2014-3507)
[Adam Langley]
*) An attacker can force openssl to consume large amounts of memory whilst
processing DTLS handshake messages. This can be exploited through a
Denial of Service attack.
Thanks to Adam Langley for discovering and researching this issue.
(CVE-2014-3506)
[Adam Langley]
*) An attacker can force an error condition which causes openssl to crash
whilst processing DTLS packets due to memory being freed twice. This
can be exploited through a Denial of Service attack.
Thanks to Adam Langley and Wan-Teh Chang for discovering and researching
this issue.
(CVE-2014-3505)
[Adam Langley]
*) If a multithreaded client connects to a malicious server using a resumed
session and the server sends an ec point format extension it could write
up to 255 bytes to freed memory.
Thanks to Gabor Tyukasz (LogMeIn Inc) for discovering and researching this
issue.
(CVE-2014-3509)
[Gabor Tyukasz]
*) A malicious server can crash an OpenSSL client with a null pointer
dereference (read) by specifying an SRP ciphersuite even though it was not
properly negotiated with the client. This can be exploited through a
Denial of Service attack.
Thanks to Joonas Kuorilehto and Riku Hietamäki (Codenomicon) for
discovering and researching this issue.
(CVE-2014-5139)
[Steve Henson]
*) A flaw in OBJ_obj2txt may cause pretty printing functions such as
X509_name_oneline, X509_name_print_ex et al. to leak some information
from the stack. Applications may be affected if they echo pretty printing
output to the attacker.
Thanks to Ivan Fratric (Google) for discovering this issue.
(CVE-2014-3508)
*) Fix ec_GFp_simple_points_make_affine (thus, EC_POINTs_mul etc.)
for corner cases. (Certain input points at infinity could lead to
bogus results, with non-infinity inputs mapped to infinity too.)
[Bodo Moeller]
Changes between 1.0.1g and 1.0.1h [5 Jun 2014]
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*) Fix for SSL/TLS MITM flaw. An attacker using a carefully crafted
handshake can force the use of weak keying material in OpenSSL
SSL/TLS clients and servers.
Thanks to KIKUCHI Masashi (Lepidum Co. Ltd.) for discovering and
researching this issue. (CVE-2014-0224)
[KIKUCHI Masashi, Steve Henson]
*) Fix DTLS recursion flaw. By sending an invalid DTLS handshake to an
OpenSSL DTLS client the code can be made to recurse eventually crashing
in a DoS attack.
Thanks to Imre Rad (Search-Lab Ltd.) for discovering this issue.
(CVE-2014-0221)
[Imre Rad, Steve Henson]
*) Fix DTLS invalid fragment vulnerability. A buffer overrun attack can
be triggered by sending invalid DTLS fragments to an OpenSSL DTLS
client or server. This is potentially exploitable to run arbitrary
code on a vulnerable client or server.
Thanks to Jüri Aedla for reporting this issue. (CVE-2014-0195)
[Jüri Aedla, Steve Henson]
*) Fix bug in TLS code where clients enable anonymous ECDH ciphersuites
are subject to a denial of service attack.
Thanks to Felix Gröbert and Ivan Fratric at Google for discovering
[Felix Gröbert, Ivan Fratric, Steve Henson]
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*) Harmonize version and its documentation. -f flag is used to display
compilation flags.
[mancha <mancha1@zoho.com>]
*) Fix eckey_priv_encode so it immediately returns an error upon a failure
in i2d_ECPrivateKey.
[mancha <mancha1@zoho.com>]
*) Fix some double frees. These are not thought to be exploitable.
[mancha <mancha1@zoho.com>]
Changes between 1.0.1f and 1.0.1g [7 Apr 2014]
*) A missing bounds check in the handling of the TLS heartbeat extension
can be used to reveal up to 64k of memory to a connected client or
server.
Thanks for Neel Mehta of Google Security for discovering this bug and to
Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for
preparing the fix (CVE-2014-0160)
[Adam Langley, Bodo Moeller]
*) Fix for the attack described in the paper "Recovering OpenSSL
ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack"
by Yuval Yarom and Naomi Benger. Details can be obtained from:
http://eprint.iacr.org/2014/140
Thanks to Yuval Yarom and Naomi Benger for discovering this
flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076)
[Yuval Yarom and Naomi Benger]
*) TLS pad extension: draft-agl-tls-padding-03
Workaround for the "TLS hang bug" (see FAQ and PR#2771): if the
TLS client Hello record length value would otherwise be > 255 and
less that 512 pad with a dummy extension containing zeroes so it
is at least 512 bytes long.
[Adam Langley, Steve Henson]
Changes between 1.0.1e and 1.0.1f [6 Jan 2014]
*) Fix for TLS record tampering bug. A carefully crafted invalid
handshake could crash OpenSSL with a NULL pointer exception.
Thanks to Anton Johansson for reporting this issues.
(CVE-2013-4353)
*) Keep original DTLS digest and encryption contexts in retransmission
structures so we can use the previous session parameters if they need
to be resent. (CVE-2013-6450)
[Steve Henson]
*) Add option SSL_OP_SAFARI_ECDHE_ECDSA_BUG (part of SSL_OP_ALL) which
avoids preferring ECDHE-ECDSA ciphers when the client appears to be
Safari on OS X. Safari on OS X 10.8..10.8.3 advertises support for
several ECDHE-ECDSA ciphers, but fails to negotiate them. The bug
is fixed in OS X 10.8.4, but Apple have ruled out both hot fixing
10.8..10.8.3 and forcing users to upgrade to 10.8.4 or newer.
[Rob Stradling, Adam Langley]
Changes between 1.0.1d and 1.0.1e [11 Feb 2013]
*) Correct fix for CVE-2013-0169. The original didn't work on AES-NI
supporting platforms or when small records were transferred.
[Andy Polyakov, Steve Henson]
Changes between 1.0.1c and 1.0.1d [5 Feb 2013]
*) Make the decoding of SSLv3, TLS and DTLS CBC records constant time.
This addresses the flaw in CBC record processing discovered by
Nadhem Alfardan and Kenny Paterson. Details of this attack can be found
at: http://www.isg.rhul.ac.uk/tls/
Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
Security Group at Royal Holloway, University of London
(www.isg.rhul.ac.uk) for discovering this flaw and Adam Langley and
Emilia Käsper for the initial patch.
[Emilia Käsper, Adam Langley, Ben Laurie, Andy Polyakov, Steve Henson]
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*) Fix flaw in AESNI handling of TLS 1.2 and 1.1 records for CBC mode
ciphersuites which can be exploited in a denial of service attack.
Thanks go to and to Adam Langley <agl@chromium.org> for discovering
and detecting this bug and to Wolfgang Ettlinger
<wolfgang.ettlinger@gmail.com> for independently discovering this issue.
(CVE-2012-2686)
[Adam Langley]
*) Return an error when checking OCSP signatures when key is NULL.
This fixes a DoS attack. (CVE-2013-0166)
[Steve Henson]
*) Make openssl verify return errors.
[Chris Palmer <palmer@google.com> and Ben Laurie]
*) Call OCSP Stapling callback after ciphersuite has been chosen, so
the right response is stapled. Also change SSL_get_certificate()
so it returns the certificate actually sent.
See http://rt.openssl.org/Ticket/Display.html?id=2836.
[Rob Stradling <rob.stradling@comodo.com>]
*) Fix possible deadlock when decoding public keys.
[Steve Henson]
*) Don't use TLS 1.0 record version number in initial client hello
if renegotiating.
[Steve Henson]
Changes between 1.0.1b and 1.0.1c [10 May 2012]
Dr. Stephen Henson
committed
*) Sanity check record length before skipping explicit IV in TLS
Dr. Stephen Henson
committed
Thanks to Codenomicon for discovering this issue using Fuzz-o-Matic
fuzzing as a service testing platform.
(CVE-2012-2333)
[Steve Henson]
*) Initialise tkeylen properly when encrypting CMS messages.
Thanks to Solar Designer of Openwall for reporting this issue.
[Steve Henson]
*) In FIPS mode don't try to use composite ciphers as they are not
approved.
[Steve Henson]
Changes between 1.0.1a and 1.0.1b [26 Apr 2012]
*) OpenSSL 1.0.0 sets SSL_OP_ALL to 0x80000FFFL and OpenSSL 1.0.1 and
1.0.1a set SSL_OP_NO_TLSv1_1 to 0x00000400L which would unfortunately
mean any application compiled against OpenSSL 1.0.0 headers setting
SSL_OP_ALL would also set SSL_OP_NO_TLSv1_1, unintentionally disablng
TLS 1.1 also. Fix this by changing the value of SSL_OP_NO_TLSv1_1 to
0x10000000L Any application which was previously compiled against
OpenSSL 1.0.1 or 1.0.1a headers and which cares about SSL_OP_NO_TLSv1_1
will need to be recompiled as a result. Letting be results in
inability to disable specifically TLS 1.1 and in client context,
in unlike event, limit maximum offered version to TLS 1.0 [see below].
[Steve Henson]
*) In order to ensure interoperabilty SSL_OP_NO_protocolX does not
Andy Polyakov
committed
disable just protocol X, but all protocols above X *if* there are
protocols *below* X still enabled. In more practical terms it means
that if application wants to disable TLS1.0 in favor of TLS1.1 and
above, it's not sufficient to pass SSL_OP_NO_TLSv1, one has to pass
SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3|SSL_OP_NO_SSLv2. This applies to
client side.
Andy Polyakov
committed
[Andy Polyakov]
Changes between 1.0.1 and 1.0.1a [19 Apr 2012]
*) Check for potentially exploitable overflows in asn1_d2i_read_bio
BUF_mem_grow and BUF_mem_grow_clean. Refuse attempts to shrink buffer
in CRYPTO_realloc_clean.
Thanks to Tavis Ormandy, Google Security Team, for discovering this
issue and to Adam Langley <agl@chromium.org> for fixing it.
(CVE-2012-2110)
[Adam Langley (Google), Tavis Ormandy, Google Security Team]
*) Don't allow TLS 1.2 SHA-256 ciphersuites in TLS 1.0, 1.1 connections.
[Adam Langley]
*) Workarounds for some broken servers that "hang" if a client hello
1. Do not use record version number > TLS 1.0 in initial client
hello: some (but not all) hanging servers will now work.
2. If we set OPENSSL_MAX_TLS1_2_CIPHER_LENGTH this will truncate
the number of ciphers sent in the client hello. This should be
set to an even number, such as 50, for example by passing:
-DOPENSSL_MAX_TLS1_2_CIPHER_LENGTH=50 to config or Configure.
Most broken servers should now work.
3. If all else fails setting OPENSSL_NO_TLS1_2_CLIENT will disable
[Steve Henson]
*) Fix SEGV in Vector Permutation AES module observed in OpenSSH.
[Andy Polyakov]
Changes between 1.0.0h and 1.0.1 [14 Mar 2012]
*) Add compatibility with old MDC2 signatures which use an ASN1 OCTET
STRING form instead of a DigestInfo.
[Steve Henson]
*) The format used for MDC2 RSA signatures is inconsistent between EVP
and the RSA_sign/RSA_verify functions. This was made more apparent when
OpenSSL used RSA_sign/RSA_verify for some RSA signatures in particular
those which went through EVP_PKEY_METHOD in 1.0.0 and later. Detect
the correct format in RSA_verify so both forms transparently work.
[Steve Henson]
*) Some servers which support TLS 1.0 can choke if we initially indicate
support for TLS 1.2 and later renegotiate using TLS 1.0 in the RSA
encrypted premaster secret. As a workaround use the maximum permitted
client version in client hello, this should keep such servers happy
and still work with previous versions of OpenSSL.
[Steve Henson]
*) Add support for TLS/DTLS heartbeats.
[Robin Seggelmann <seggelmann@fh-muenster.de>]
*) Add support for SCTP.
[Robin Seggelmann <seggelmann@fh-muenster.de>]
*) Improved PRNG seeding for VOS.
[Paul Green <Paul.Green@stratus.com>]
*) Extensive assembler packs updates, most notably:
- x86[_64]: AES-NI, PCLMULQDQ, RDRAND support;
- x86[_64]: SSSE3 support (SHA1, vector-permutation AES);
- x86_64: bit-sliced AES implementation;
- ARM: NEON support, contemporary platforms optimizations;
- s390x: z196 support;
- *: GHASH and GF(2^m) multiplication implementations;
[Andy Polyakov]
*) Make TLS-SRP code conformant with RFC 5054 API cleanup
(removal of unnecessary code)
[Peter Sylvester <peter.sylvester@edelweb.fr>]
*) Add TLS key material exporter from RFC 5705.
[Eric Rescorla]
*) Add DTLS-SRTP negotiation from RFC 5764.
[Eric Rescorla]
*) Add Next Protocol Negotiation,
http://tools.ietf.org/html/draft-agl-tls-nextprotoneg-00. Can be
disabled with a no-npn flag to config or Configure. Code donated
by Google.
[Adam Langley <agl@google.com> and Ben Laurie]
*) Add optional 64-bit optimized implementations of elliptic curves NIST-P224,
NIST-P256, NIST-P521, with constant-time single point multiplication on
typical inputs. Compiler support for the nonstandard type __uint128_t is
required to use this (present in gcc 4.4 and later, for 64-bit builds).
Code made available under Apache License version 2.0.
Specify "enable-ec_nistp_64_gcc_128" on the Configure (or config) command
line to include this in your build of OpenSSL, and run "make depend" (or
"make update"). This enables the following EC_METHODs:
EC_GFp_nistp224_method()
EC_GFp_nistp256_method()
EC_GFp_nistp521_method()
EC_GROUP_new_by_curve_name() will automatically use these (while
EC_GROUP_new_curve_GFp() currently prefers the more flexible
implementations).
[Emilia Käsper, Adam Langley, Bodo Moeller (Google)]
*) Use type ossl_ssize_t instad of ssize_t which isn't available on
all platforms. Move ssize_t definition from e_os.h to the public
header file e_os2.h as it now appears in public header file cms.h
[Steve Henson]
*) New -sigopt option to the ca, req and x509 utilities. Additional
signature parameters can be passed using this option and in
*) Add RSA PSS signing function. This will generate and set the
appropriate AlgorithmIdentifiers for PSS based on those in the
corresponding EVP_MD_CTX structure. No application support yet.
[Steve Henson]
*) Support for companion algorithm specific ASN1 signing routines.
New function ASN1_item_sign_ctx() signs a pre-initialised
EVP_MD_CTX structure and sets AlgorithmIdentifiers based on
the appropriate parameters.
[Steve Henson]
*) Add new algorithm specific ASN1 verification initialisation function
to EVP_PKEY_ASN1_METHOD: this is not in EVP_PKEY_METHOD since the ASN1
handling will be the same no matter what EVP_PKEY_METHOD is used.
Add a PSS handler to support verification of PSS signatures: checked
against a number of sample certificates.
[Steve Henson]
*) Add signature printing for PSS. Add PSS OIDs.
Dr. Stephen Henson
committed
[Steve Henson, Martin Kaiser <lists@kaiser.cx>]
Dr. Stephen Henson
committed
Dr. Stephen Henson
committed
*) Add algorithm specific signature printing. An individual ASN1 method
can now print out signatures instead of the standard hex dump.
More complex signatures (e.g. PSS) can print out more meaningful
information. Include DSA version that prints out the signature
parameters r, s.
Dr. Stephen Henson
committed
[Steve Henson]
*) Password based recipient info support for CMS library: implementing
RFC3211.
[Steve Henson]
Dr. Stephen Henson
committed
*) Split password based encryption into PBES2 and PBKDF2 functions. This
neatly separates the code into cipher and PBE sections and is required
for some algorithms that split PBES2 into separate pieces (such as
password based CMS).
*) Session-handling fixes:
- Fix handling of connections that are resuming with a session ID,
but also support Session Tickets.
- Fix a bug that suppressed issuing of a new ticket if the client
presented a ticket with an expired session.
- Try to set the ticket lifetime hint to something reasonable.
- Make tickets shorter by excluding irrelevant information.
- On the client side, don't ignore renewed tickets.
[Adam Langley, Bodo Moeller (Google)]
*) Fix PSK session representation.
[Bodo Moeller]
*) Add RC4-MD5 and AESNI-SHA1 "stitched" implementations.
This work was sponsored by Intel.
[Andy Polyakov]
*) Add GCM support to TLS library. Some custom code is needed to split
the IV between the fixed (from PRF) and explicit (from TLS record)
portions. This adds all GCM ciphersuites supported by RFC5288 and
RFC5289. Generalise some AES* cipherstrings to include GCM and
add a special AESGCM string for GCM only.
[Steve Henson]
*) Expand range of ctrls for AES GCM. Permit setting invocation
field on decrypt and retrieval of invocation field only on encrypt.
[Steve Henson]
*) Add HMAC ECC ciphersuites from RFC5289. Include SHA384 PRF support.
As required by RFC5289 these ciphersuites cannot be used if for
versions of TLS earlier than 1.2.
[Steve Henson]
*) For FIPS capable OpenSSL interpret a NULL default public key method
as unset and return the appropriate default but do *not* set the default.
This means we can return the appropriate method in applications that
switch between FIPS and non-FIPS modes.
*) Redirect HMAC and CMAC operations to FIPS module in FIPS mode. If an
ENGINE is used then we cannot handle that in the FIPS module so we
keep original code iff non-FIPS operations are allowed.
[Steve Henson]
*) Add -attime option to openssl utilities.
[Peter Eckersley <pde@eff.org>, Ben Laurie and Steve Henson]
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*) Redirect DSA and DH operations to FIPS module in FIPS mode.
[Steve Henson]
*) Redirect ECDSA and ECDH operations to FIPS module in FIPS mode. Also use
FIPS EC methods unconditionally for now.
[Steve Henson]
*) New build option no-ec2m to disable characteristic 2 code.
[Steve Henson]
*) Backport libcrypto audit of return value checking from 1.1.0-dev; not
all cases can be covered as some introduce binary incompatibilities.
[Steve Henson]
*) Redirect RSA operations to FIPS module including keygen,
encrypt, decrypt, sign and verify. Block use of non FIPS RSA methods.
[Steve Henson]
*) Add similar low level API blocking to ciphers.
[Steve Henson]
*) Low level digest APIs are not approved in FIPS mode: any attempt
to use these will cause a fatal error. Applications that *really* want
to use them can use the private_* version instead.
[Steve Henson]
*) Redirect cipher operations to FIPS module for FIPS builds.
[Steve Henson]
*) Redirect digest operations to FIPS module for FIPS builds.
[Steve Henson]
*) Update build system to add "fips" flag which will link in fipscanister.o
for static and shared library builds embedding a signature if needed.
[Steve Henson]
*) Output TLS supported curves in preference order instead of numerical
order. This is currently hardcoded for the highest order curves first.
This should be configurable so applications can judge speed vs strength.
[Steve Henson]
*) Add TLS v1.2 server support for client authentication.
[Steve Henson]
*) Add support for FIPS mode in ssl library: disable SSLv3, non-FIPS ciphers
and enable MD5.
[Steve Henson]
*) Functions FIPS_mode_set() and FIPS_mode() which call the underlying
FIPS modules versions.
[Steve Henson]
*) Add TLS v1.2 client side support for client authentication. Keep cache
of handshake records longer as we don't know the hash algorithm to use
until after the certificate request message is received.
[Steve Henson]
*) Initial TLS v1.2 client support. Add a default signature algorithms
extension including all the algorithms we support. Parse new signature
format in client key exchange. Relax some ECC signing restrictions for
TLS v1.2 as indicated in RFC5246.
[Steve Henson]
*) Add server support for TLS v1.2 signature algorithms extension. Switch
to new signature format when needed using client digest preference.
All server ciphersuites should now work correctly in TLS v1.2. No client
support yet and no support for client certificates.
[Steve Henson]
*) Initial TLS v1.2 support. Add new SHA256 digest to ssl code, switch
to SHA256 for PRF when using TLS v1.2 and later. Add new SHA256 based
ciphersuites. At present only RSA key exchange ciphersuites work with
TLS v1.2. Add new option for TLS v1.2 replacing the old and obsolete
SSL_OP_PKCS1_CHECK flags with SSL_OP_NO_TLSv1_2. New TLSv1.2 methods
and version checking.
[Steve Henson]
*) New option OPENSSL_NO_SSL_INTERN. If an application can be compiled
with this defined it will not be affected by any changes to ssl internal
structures. Add several utility functions to allow openssl application
to work with OPENSSL_NO_SSL_INTERN defined.
[Steve Henson]
*) Add SRP support.
[Tom Wu <tjw@cs.stanford.edu> and Ben Laurie]
*) Add functions to copy EVP_PKEY_METHOD and retrieve flags and id.
[Steve Henson]
*) Permit abbreviated handshakes when renegotiating using the function
SSL_renegotiate_abbreviated().
[Robin Seggelmann <seggelmann@fh-muenster.de>]
Dr. Stephen Henson
committed
*) Add call to ENGINE_register_all_complete() to
ENGINE_load_builtin_engines(), so some implementations get used
automatically instead of needing explicit application support.
[Steve Henson]
*) Add support for TLS key exporter as described in RFC5705.
[Robin Seggelmann <seggelmann@fh-muenster.de>, Steve Henson]
*) Initial TLSv1.1 support. Since TLSv1.1 is very similar to TLS v1.0 only
a few changes are required:
Add SSL_OP_NO_TLSv1_1 flag.
Add TLSv1_1 methods.
Update version checking logic to handle version 1.1.
Add explicit IV handling (ported from DTLS code).
Add command line options to s_client/s_server.
[Steve Henson]
Changes between 1.0.0g and 1.0.0h [12 Mar 2012]
*) Fix MMA (Bleichenbacher's attack on PKCS #1 v1.5 RSA padding) weakness
in CMS and PKCS7 code. When RSA decryption fails use a random key for
content decryption and always return the same error. Note: this attack
needs on average 2^20 messages so it only affects automated senders. The
old behaviour can be reenabled in the CMS code by setting the
CMS_DEBUG_DECRYPT flag: this is useful for debugging and testing where
an MMA defence is not necessary.
Thanks to Ivan Nestlerode <inestlerode@us.ibm.com> for discovering
this issue. (CVE-2012-0884)
[Steve Henson]
*) Fix CVE-2011-4619: make sure we really are receiving a
client hello before rejecting multiple SGC restarts. Thanks to
Ivan Nestlerode <inestlerode@us.ibm.com> for discovering this bug.
[Steve Henson]
Changes between 1.0.0f and 1.0.0g [18 Jan 2012]
*) Fix for DTLS DoS issue introduced by fix for CVE-2011-4109.
Thanks to Antonio Martin, Enterprise Secure Access Research and
Development, Cisco Systems, Inc. for discovering this bug and
preparing a fix. (CVE-2012-0050)
[Antonio Martin]
Dr. Stephen Henson
committed
*) Nadhem Alfardan and Kenny Paterson have discovered an extension
of the Vaudenay padding oracle attack on CBC mode encryption
which enables an efficient plaintext recovery attack against
the OpenSSL implementation of DTLS. Their attack exploits timing
differences arising during decryption processing. A research
paper describing this attack can be found at:
http://www.isg.rhul.ac.uk/~kp/dtls.pdf
Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
Security Group at Royal Holloway, University of London
(www.isg.rhul.ac.uk) for discovering this flaw and to Robin Seggelmann
<seggelmann@fh-muenster.de> and Michael Tuexen <tuexen@fh-muenster.de>
for preparing the fix. (CVE-2011-4108)
[Robin Seggelmann, Michael Tuexen]
*) Clear bytes used for block padding of SSL 3.0 records.
(CVE-2011-4576)
[Adam Langley (Google)]
*) Only allow one SGC handshake restart for SSL/TLS. Thanks to George
Kadianakis <desnacked@gmail.com> for discovering this issue and
Adam Langley for preparing the fix. (CVE-2011-4619)
[Adam Langley (Google)]
*) Check parameters are not NULL in GOST ENGINE. (CVE-2012-0027)
[Andrey Kulikov <amdeich@gmail.com>]
*) Prevent malformed RFC3779 data triggering an assertion failure.
Thanks to Andrew Chi, BBN Technologies, for discovering the flaw
and Rob Austein <sra@hactrn.net> for fixing it. (CVE-2011-4577)
[Rob Austein <sra@hactrn.net>]
*) Improved PRNG seeding for VOS.
[Paul Green <Paul.Green@stratus.com>]
*) Fix ssl_ciph.c set-up race.
[Adam Langley (Google)]
*) Fix the BIO_f_buffer() implementation (which was mixing different
interpretations of the '..._len' fields).
[Adam Langley (Google)]
*) Fix handling of BN_BLINDING: now BN_BLINDING_invert_ex (rather than
BN_BLINDING_invert_ex) calls BN_BLINDING_update, ensuring that concurrent
threads won't reuse the same blinding coefficients.
This also avoids the need to obtain the CRYPTO_LOCK_RSA_BLINDING
lock to call BN_BLINDING_invert_ex, and avoids one use of
BN_BLINDING_update for each BN_BLINDING structure (previously,
the last update always remained unused).
*) In ssl3_clear, preserve s3->init_extra along with s3->rbuf.
[Bob Buckholz (Google)]
Changes between 1.0.0d and 1.0.0e [6 Sep 2011]
Dr. Stephen Henson
committed
*) Fix bug where CRLs with nextUpdate in the past are sometimes accepted
by initialising X509_STORE_CTX properly. (CVE-2011-3207)
[Kaspar Brand <ossl@velox.ch>]
*) Fix SSL memory handling for (EC)DH ciphersuites, in particular
Dr. Stephen Henson
committed
for multi-threaded use of ECDH. (CVE-2011-3210)
*) Fix x509_name_ex_d2i memory leak on bad inputs.
[Bodo Moeller]
*) Remove hard coded ecdsaWithSHA1 signature tests in ssl code and check
signature public key algorithm by using OID xref utilities instead.
Before this you could only use some ECC ciphersuites with SHA1 only.
[Steve Henson]
*) Add protection against ECDSA timing attacks as mentioned in the paper
by Billy Bob Brumley and Nicola Tuveri, see:
http://eprint.iacr.org/2011/232.pdf
[Billy Bob Brumley and Nicola Tuveri]
Changes between 1.0.0c and 1.0.0d [8 Feb 2011]
*) Fix parsing of OCSP stapling ClientHello extension. CVE-2011-0014
[Neel Mehta, Adam Langley, Bodo Moeller (Google)]
*) Fix bug in string printing code: if *any* escaping is enabled we must
escape the escape character (backslash) or the resulting string is
ambiguous.
[Steve Henson]
Changes between 1.0.0b and 1.0.0c [2 Dec 2010]
*) Disable code workaround for ancient and obsolete Netscape browsers
and servers: an attacker can use it in a ciphersuite downgrade attack.
Thanks to Martin Rex for discovering this bug. CVE-2010-4180
[Steve Henson]
*) Fixed J-PAKE implementation error, originally discovered by
Sebastien Martini, further info and confirmation from Stefan
Arentz and Feng Hao. Note that this fix is a security fix. CVE-2010-4252
[Ben Laurie]
Changes between 1.0.0a and 1.0.0b [16 Nov 2010]
*) Fix extension code to avoid race conditions which can result in a buffer
overrun vulnerability: resumed sessions must not be modified as they can
be shared by multiple threads. CVE-2010-3864
*) Fix WIN32 build system to correctly link an ENGINE directory into
a DLL.
[Steve Henson]
Changes between 1.0.0 and 1.0.0a [01 Jun 2010]
*) Check return value of int_rsa_verify in pkey_rsa_verifyrecover
(CVE-2010-1633)
[Steve Henson, Peter-Michael Hager <hager@dortmund.net>]
Dr. Stephen Henson
committed
Changes between 0.9.8n and 1.0.0 [29 Mar 2010]
Dr. Stephen Henson
committed
Dr. Stephen Henson
committed
*) Add "missing" function EVP_CIPHER_CTX_copy(). This copies a cipher
context. The operation can be customised via the ctrl mechanism in
case ENGINEs want to include additional functionality.
[Steve Henson]
*) Tolerate yet another broken PKCS#8 key format: private key value negative.
[Steve Henson]
*) Add new -subject_hash_old and -issuer_hash_old options to x509 utility to
output hashes compatible with older versions of OpenSSL.
[Willy Weisz <weisz@vcpc.univie.ac.at>]
*) Fix compression algorithm handling: if resuming a session use the
compression algorithm of the resumed session instead of determining
it from client hello again. Don't allow server to change algorithm.
[Steve Henson]
Dr. Stephen Henson
committed
*) Add load_crls() function to apps tidying load_certs() too. Add option
to verify utility to allow additional CRLs to be included.
[Steve Henson]
*) Update OCSP request code to permit adding custom headers to the request:
some responders need this.
[Steve Henson]
*) The function EVP_PKEY_sign() returns <=0 on error: check return code
correctly.
[Julia Lawall <julia@diku.dk>]
Dr. Stephen Henson
committed
*) Update verify callback code in apps/s_cb.c and apps/verify.c, it
needlessly dereferenced structures, used obsolete functions and
didn't handle all updated verify codes correctly.
[Steve Henson]
*) Disable MD2 in the default configuration.
*) In BIO_pop() and BIO_push() use the ctrl argument (which was NULL) to
indicate the initial BIO being pushed or popped. This makes it possible
to determine whether the BIO is the one explicitly called or as a result
of the ctrl being passed down the chain. Fix BIO_pop() and SSL BIOs so
it handles reference counts correctly and doesn't zero out the I/O bio
when it is not being explicitly popped. WARNING: applications which
included workarounds for the old buggy behaviour will need to be modified
or they could free up already freed BIOs.
[Steve Henson]
*) Extend the uni2asc/asc2uni => OPENSSL_uni2asc/OPENSSL_asc2uni
renaming to all platforms (within the 0.9.8 branch, this was
done conditionally on Netware platforms to avoid a name clash).
[Guenter <lists@gknw.net>]
*) Add ECDHE and PSK support to DTLS.
[Michael Tuexen <tuexen@fh-muenster.de>]
*) Add CHECKED_STACK_OF macro to safestack.h, otherwise safestack can't
be used on C++.
[Steve Henson]
*) Add "missing" function EVP_MD_flags() (without this the only way to
retrieve a digest flags is by accessing the structure directly. Update
EVP_MD_do_all*() and EVP_CIPHER_do_all*() to include the name a digest
or cipher is registered as in the "from" argument. Print out all
registered digests in the dgst usage message instead of manually
attempting to work them out.
[Steve Henson]
*) If no SSLv2 ciphers are used don't use an SSLv2 compatible client hello:
this allows the use of compression and extensions. Change default cipher
string to remove SSLv2 ciphersuites. This effectively avoids ancient SSLv2
by default unless an application cipher string requests it.
[Steve Henson]
*) Alter match criteria in PKCS12_parse(). It used to try to use local
key ids to find matching certificates and keys but some PKCS#12 files
don't follow the (somewhat unwritten) rules and this strategy fails.
Now just gather all certificates together and the first private key
then look for the first certificate that matches the key.
[Steve Henson]
Dr. Stephen Henson
committed
*) Support use of registered digest and cipher names for dgst and cipher
commands instead of having to add each one as a special case. So now
you can do:
openssl sha256 foo
as well as:
openssl dgst -sha256 foo
and this works for ENGINE based algorithms too.
[Steve Henson]
*) Update Gost ENGINE to support parameter files.
[Victor B. Wagner <vitus@cryptocom.ru>]
*) Support GeneralizedTime in ca utility.
[Oliver Martin <oliver@volatilevoid.net>, Steve Henson]
*) Enhance the hash format used for certificate directory links. The new
form uses the canonical encoding (meaning equivalent names will work
even if they aren't identical) and uses SHA1 instead of MD5. This form
is incompatible with the older format and as a result c_rehash should
be used to rebuild symbolic links.
[Steve Henson]
*) Make PKCS#8 the default write format for private keys, replacing the
traditional format. This form is standardised, more secure and doesn't
include an implicit MD5 dependency.
[Steve Henson]
*) Add a $gcc_devteam_warn option to Configure. The idea is that any code
committed to OpenSSL should pass this lot as a minimum.
[Steve Henson]
*) Add session ticket override functionality for use by EAP-FAST.
[Jouni Malinen <j@w1.fi>]
*) Modify HMAC functions to return a value. Since these can be implemented
in an ENGINE errors can occur.
[Steve Henson]
*) Type-checked OBJ_bsearch_ex.
[Ben Laurie]
*) Type-checked OBJ_bsearch. Also some constification necessitated
by type-checking. Still to come: TXT_DB, bsearch(?),
OBJ_bsearch_ex, qsort, CRYPTO_EX_DATA, ASN1_VALUE, ASN1_STRING,
Dr. Stephen Henson
committed
*) New function OPENSSL_gmtime_adj() to add a specific number of days and
seconds to a tm structure directly, instead of going through OS
specific date routines. This avoids any issues with OS routines such
as the year 2038 bug. New *_adj() functions for ASN1 time structures