VDB
CVE-2021-23979
CVE-2021-23979
PUBLISHED
Mozilla developers reported memory safety bugs present in Firefox 85. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 86.
EPSS 0.32% · 55.7th percentile
Risk Scores
EPSS Score
0.32%
55.7th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:18.04:LTS | mozjs52 | 52.3.1-0ubuntu3, 0, 52.3.1-7fakesync1 |
| Ubuntu:20.04:LTS | mozjs52 | 0, 52.9.1-1ubuntu3, 52.9.1-1build1 |
| Ubuntu:22.04:LTS | mozjs78 | 78.13.0-1, 78.15.0-4ubuntu1, 0 |
| Ubuntu:18.04:LTS | firefox | 63.0+build2-0ubuntu0.18.04.2, 63.0.3+build1-0ubuntu0.18.04.1, 64.0+build3-0ubuntu0.18.04.1 |
| Ubuntu:18.04:LTS | mozjs38 | 38.8.0~repack1-0ubuntu1, 38.8.0~repack1-0ubuntu3, * |
| Ubuntu:20.04:LTS | mozjs68 | 0, 68.6.0-1ubuntu1, 68.5.0-1~fakesync |
| Ubuntu:20.04:LTS | firefox | 82.0+build2-0ubuntu0.20.04.1, 82.0.2+build1-0ubuntu0.20.04.1, 82.0.3+build1-0ubuntu0.20.04.1 |
| Ubuntu:16.04:LTS | firefox | *, 41.0.2+build2-0ubuntu1, 42.0+build2-0ubuntu1 |
Exploit Intelligence
Timeline
- Feb 26, 2021 CVE Published
- Apr 14, 2021 EPSS Score
- Jun 23, 2021 EPSS Score
- Aug 24, 2021 EPSS Score
- Dec 27, 2021 EPSS Score
- Jan 6, 2022 EPSS Score
- Feb 4, 2022 EPSS Score
- Feb 28, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- Jul 3, 2022 EPSS Score
- Sep 4, 2022 EPSS Score
- Nov 6, 2022 EPSS Score
References
- https://ubuntu.com/security/CVE-2021-23979 third-party-advisory
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-07/#CVE-2021-23979 third-party-advisory
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1663222%2C1666607%2C1672120%2C1678463%2C1678927%2C1679560%2C1681297%2C1681684%2C1683490%2C1684377%2C1684902 third-party-advisory
- https://www.mozilla.org/security/advisories/mfsa2021-07/ third-party-advisory
- https://ubuntu.com/security/notices/USN-4756-1 vendor-advisory
- https://www.cve.org/CVERecord?id=CVE-2021-23979 third-party-advisory