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Ralf S. Engelschall
committed
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Changes between 1.0.1g and 1.0.1h [xx XXX xxxx]
*) 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]
*) 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]
*) 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.
(CVE-2013-0169)
[Emilia Käsper, Adam Langley, Ben Laurie, Andy Polyakov, Steve Henson]
*) 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
1.2, 1.1 and DTLS to fix DoS attack.
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]
Andy Polyakov
committed
*) In order to ensure interoperabilty SSL_OP_NO_protocolX does not
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
record length exceeds 255 bytes.
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
TLS 1.2 client support entirely.
[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 pemitted
client version in client hello, this should keep such servers happy
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