CVE-2015-2721
Publication date 5 July 2015
Last updated 24 July 2024
Ubuntu 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 | ||
| 14.04 LTS trusty |
Fixed 39.0+build5-0ubuntu0.14.04.1
|
|
| nss | ||
| 14.04 LTS trusty |
Fixed 2:3.19.2-0ubuntu0.14.04.1
|
|
| thunderbird | ||
| 14.04 LTS trusty |
Fixed 1:31.8.0+build1-0ubuntu0.14.04.1
|
|
References
Related Ubuntu Security Notices (USN)
- USN-2673-1
- Thunderbird vulnerabilities
- 20 July 2015
- USN-2672-1
- NSS vulnerabilities
- 9 July 2015
- USN-2656-1
- Firefox vulnerabilities
- 9 July 2015
- USN-2656-2
- Firefox vulnerabilities
- 15 July 2015
Other references
- https://www.mozilla.org/en-US/security/advisories/mfsa2015-71/
- https://smacktls.com
- https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.19_release_notes
- https://bugzilla.mozilla.org/show_bug.cgi?id=1086145
- http://www.mozilla.org/security/announce/2015/mfsa2015-71.html
- https://www.cve.org/CVERecord?id=CVE-2015-2721