OpenSSL CHANGES
_______________
- Changes between 1.0.2j and 1.0.2k [xx XXX xxxx]
+ Changes between 1.0.2k and 1.0.2l [xx XXX xxxx]
+
+ *)
+
+ Changes between 1.0.2j and 1.0.2k [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]
+
+ *) 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]
+
+ *) 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]
*) 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
projects / openssl.git / blobdiff