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Ralf S. Engelschall
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Changes between 1.1.0e and 1.1.1 [xx XXX xxxx]
*) Fragmented SSL/TLS alerts are no longer accepted. An alert message is 2
bytes long. In theory it is permissible in SSLv3 - TLSv1.2 to fragment such
alerts across multiple records (some of which could be empty). In practice
it make no sense to send an empty alert record, or to fragment one. TLSv1.3
prohibts this altogether and other libraries (BoringSSL, NSS) do not
support this at all. Supporting it adds significant complexity to the
record layer, and its removal is unlikely to cause inter-operability
issues.
[Matt Caswell]
*) Add the ASN.1 types INT32, UINT32, INT64, UINT64 and variants prefixed
with Z. These are meant to replace LONG and ZLONG and to be size safe.
The use of LONG and ZLONG is discouraged and scheduled for deprecation
in OpenSSL 1.2.0.
[Richard Levitte]
*) Add the 'z' and 'j' modifiers to BIO_printf() et al formatting string,
'z' is to be used for [s]size_t, and 'j' - with [u]int64_t.
[Richard Levitte, Andy Polyakov]
*) Add EC_KEY_get0_engine(), which does for EC_KEY what RSA_get0_engine()
does for RSA, etc.
[Richard Levitte]
*) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target
platform rather than 'mingw'.
[Richard Levitte]
*) The functions X509_STORE_add_cert and X509_STORE_add_crl return
success if they are asked to add an object which already exists
in the store. This change cascades to other functions which load
certificates and CRLs.
[Paul Dale]
*) x86_64 assembly pack: annotate code with DWARF CFI directives to
facilitate stack unwinding even from assembly subroutines.
[Andy Polyakov]
*) Remove VAX C specific definitions of OPENSSL_EXPORT, OPENSSL_EXTERN.
Also remove OPENSSL_GLOBAL entirely, as it became a no-op.
[Richard Levitte]
*) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c.
VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1,
which is the minimum version we support.
[Richard Levitte]
*) Certificate time validation (X509_cmp_time) enforces stricter
compliance with RFC 5280. Fractional seconds and timezone offsets
are no longer allowed.
[Emilia Käsper]
*) Add support for ARIA
[Paul Dale]
*) s_client will now send the Server Name Indication (SNI) extension by
default unless the new "-noservername" option is used. The server name is
based on the host provided to the "-connect" option unless overridden by
using "-servername".
[Matt Caswell]
*) Add support for SipHash
[Todd Short]
*) OpenSSL now fails if it receives an unrecognised record type in TLS1.0
or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to
prevent issues where no progress is being made and the peer continually
sends unrecognised record types, using up resources processing them.
[Matt Caswell]
*) 'openssl passwd' can now produce SHA256 and SHA512 based output,
using the algorithm defined in
https://www.akkadia.org/drepper/SHA-crypt.txt
[Richard Levitte]
*) Heartbeat support has been removed; the ABI is changed for now.
[Richard Levitte, Rich Salz]
*) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd.
[Emilia Käsper]
*) The RSA "null" method, which was partially supported to avoid patent
issues, has been replaced to always returns NULL.
[Rich Salz]
Changes between 1.1.0d and 1.1.0e [16 Feb 2017]
*) Encrypt-Then-Mac renegotiation crash
During a renegotiation handshake if the Encrypt-Then-Mac extension is
negotiated where it was not in the original handshake (or vice-versa) then
this can cause OpenSSL to crash (dependant on ciphersuite). Both clients
and servers are affected.
This issue was reported to OpenSSL by Joe Orton (Red Hat).
(CVE-2017-3733)
[Matt Caswell]
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Changes between 1.1.0c and 1.1.0d [26 Jan 2017]
*) Truncated packet could crash via OOB read
If one side of an SSL/TLS path is running on a 32-bit host and a specific
cipher is being used, then a truncated packet can cause that host to
perform an out-of-bounds read, usually resulting in a crash.
This issue was reported to OpenSSL by Robert Święcki of Google.
(CVE-2017-3731)
[Andy Polyakov]
*) Bad (EC)DHE parameters cause a client crash
If a malicious server supplies bad parameters for a DHE or ECDHE key
exchange then this can result in the client attempting to dereference a
NULL pointer leading to a client crash. This could be exploited in a Denial
of Service attack.
This issue was reported to OpenSSL by Guido Vranken.
(CVE-2017-3730)
[Matt Caswell]
*) BN_mod_exp may produce incorrect results on x86_64
There is a carry propagating bug in the x86_64 Montgomery squaring
procedure. No EC algorithms are affected. Analysis suggests that attacks
against RSA and DSA as a result of this defect would be very difficult to
perform and are not believed likely. Attacks against DH are considered just
feasible (although very difficult) because most of the work necessary to
deduce information about a private key may be performed offline. The amount
of resources required for such an attack would be very significant and
likely only accessible to a limited number of attackers. An attacker would
additionally need online access to an unpatched system using the target
private key in a scenario with persistent DH parameters and a private
key that is shared between multiple clients. For example this can occur by
default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very
similar to CVE-2015-3193 but must be treated as a separate problem.
This issue was reported to OpenSSL by the OSS-Fuzz project.
(CVE-2017-3732)
[Andy Polyakov]
Changes between 1.1.0b and 1.1.0c [10 Nov 2016]
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*) ChaCha20/Poly1305 heap-buffer-overflow
TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to
a DoS attack by corrupting larger payloads. This can result in an OpenSSL
crash. This issue is not considered to be exploitable beyond a DoS.
This issue was reported to OpenSSL by Robert Święcki (Google Security Team)
(CVE-2016-7054)
[Richard Levitte]
*) CMS Null dereference
Applications parsing invalid CMS structures can crash with a NULL pointer
dereference. This is caused by a bug in the handling of the ASN.1 CHOICE
type in OpenSSL 1.1.0 which can result in a NULL value being passed to the
structure callback if an attempt is made to free certain invalid encodings.
Only CHOICE structures using a callback which do not handle NULL value are
affected.
This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure.
(CVE-2016-7053)
[Stephen Henson]
*) Montgomery multiplication may produce incorrect results
There is a carry propagating bug in the Broadwell-specific Montgomery
multiplication procedure that handles input lengths divisible by, but
longer than 256 bits. Analysis suggests that attacks against RSA, DSA
and DH private keys are impossible. This is because the subroutine in
question is not used in operations with the private key itself and an input
of the attacker's direct choice. Otherwise the bug can manifest itself as
transient authentication and key negotiation failures or reproducible
erroneous outcome of public-key operations with specially crafted input.
Among EC algorithms only Brainpool P-512 curves are affected and one
presumably can attack ECDH key negotiation. Impact was not analyzed in
detail, because pre-requisites for attack are considered unlikely. Namely
multiple clients have to choose the curve in question and the server has to
share the private key among them, neither of which is default behaviour.
Even then only clients that chose the curve will be affected.
This issue was publicly reported as transient failures and was not
initially recognized as a security issue. Thanks to Richard Morgan for
providing reproducible case.
(CVE-2016-7055)
[Andy Polyakov]
*) Removed automatic addition of RPATH in shared libraries and executables,
as this was a remainder from OpenSSL 1.0.x and isn't needed any more.
[Richard Levitte]
Changes between 1.1.0a and 1.1.0b [26 Sep 2016]
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