OpenSSL v1.1.0.c Release Notes
Release Date: 2017-01-26 // over 7 years ago-
- 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