CVE-2015-2721

Publication date 5 July 2015

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Mozilla Network Security Services (NSS) before 3.19, as used in Mozilla Firefox before 39.0, Firefox ESR 31.x before 31.8 and 38.x before 38.1, Thunderbird before 38.1, and other products, does not properly determine state transitions for the TLS state machine, which allows man-in-the-middle attackers to defeat cryptographic protection mechanisms by blocking messages, as demonstrated by removing a forward-secrecy property by blocking a ServerKeyExchange message, aka a "SMACK SKIP-TLS" issue.

Status

Package Ubuntu Release Status
firefox 15.04 vivid
Fixed 39.0+build5-0ubuntu0.15.04.1
14.10 utopic
Fixed 39.0+build5-0ubuntu0.14.10.1
14.04 LTS trusty
Fixed 39.0+build5-0ubuntu0.14.04.1
12.04 LTS precise
Fixed 39.0+build5-0ubuntu0.12.04.2
nss 15.04 vivid
Fixed 2:3.19.2-0ubuntu15.04.1
14.10 utopic
Fixed 2:3.19.2-0ubuntu0.14.10.1
14.04 LTS trusty
Fixed 2:3.19.2-0ubuntu0.14.04.1
12.04 LTS precise
Fixed 3.19.2-0ubuntu0.12.04.1
thunderbird 15.04 vivid
Fixed 1:31.8.0+build1-0ubuntu0.15.04.1
14.10 utopic
Fixed 1:31.8.0+build1-0ubuntu0.14.10.1
14.04 LTS trusty
Fixed 1:31.8.0+build1-0ubuntu0.14.04.1
12.04 LTS precise
Fixed 1:31.8.0+build1-0ubuntu0.12.04.1