VDB
CVE-2015-2721
CVE-2015-2721
PUBLISHED
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.
EPSS 3.27% · 87.9th percentile
Risk Scores
EPSS Score
3.27%
87.9th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:14.04:LTS | firefox | 29.0+build1-0ubuntu0.14.04.2, *, * |
| Ubuntu:14.04:LTS | nss | *, 0, 2:3.15.1-1ubuntu1 |
| Ubuntu:14.04:LTS | thunderbird | 1:24.0+build1-0ubuntu1, 0, * |
Timeline
- Jul 3, 2015 CVE Published
- Feb 4, 2022 EPSS Score
- Mar 29, 2022 EPSS Score
- May 21, 2022 EPSS Score
- Sep 4, 2022 EPSS Score
- Oct 27, 2022 EPSS Score
- Dec 19, 2022 EPSS Score
- Feb 10, 2023 EPSS Score
- Mar 7, 2023 EPSS Score
- Apr 4, 2023 EPSS Score
- Jul 18, 2023 EPSS Score
- Sep 9, 2023 EPSS Score
References
- https://ubuntu.com/security/CVE-2015-2721 third-party-advisory
- https://www.mozilla.org/en-US/security/advisories/mfsa2015-71/ third-party-advisory
- https://smacktls.com third-party-advisory
- https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.19_release_notes third-party-advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1086145 third-party-advisory
- http://www.mozilla.org/security/announce/2015/mfsa2015-71.html third-party-advisory
- https://ubuntu.com/security/notices/USN-2672-1 vendor-advisory
- https://ubuntu.com/security/notices/USN-2656-1 vendor-advisory
- https://ubuntu.com/security/notices/USN-2656-2 vendor-advisory
- https://ubuntu.com/security/notices/USN-2673-1 vendor-advisory
- https://www.cve.org/CVERecord?id=CVE-2015-2721 third-party-advisory