VDB
CVE-2021-23986
CVE-2021-23986
PUBLISHED
A malicious extension with the 'search' permission could have installed a new search engine whose favicon referenced a cross-origin URL. The response to this cross-origin request could have been read by the extension, allowing a same-origin policy bypass by the extension, which should not have cross-origin permissions. This cross-origin request was made without cookies, so the sensitive information disclosed by the violation was limited to local-network resources or resources that perform IP-based authentication. This vulnerability affects Firefox < 87.
EPSS 0.09% · 25.0th percentile
Risk Scores
EPSS Score
0.09%
25.0th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:22.04:LTS | mozjs78 | 78.15.0-4ubuntu1, 0, 78.13.0-1 |
| Ubuntu:20.04:LTS | mozjs52 | 52.9.1-1build1, 0, 52.9.1-1ubuntu3 |
| Ubuntu:18.04:LTS | firefox | 66.0+build3-0ubuntu0.18.04.1, 68.0+build3-0ubuntu0.18.04.1, 68.0.2+build1-0ubuntu0.18.04.1 |
| Ubuntu:20.04:LTS | firefox | 83.0+build2-0ubuntu0.20.04.1, *, * |
| Ubuntu:16.04:LTS | firefox | 86.0.1+build1-0ubuntu0.16.04.2, 0, 41.0.2+build2-0ubuntu1 |
| Ubuntu:18.04:LTS | mozjs38 | 0, 38.8.0~repack1-0ubuntu1, 38.8.0~repack1-0ubuntu3 |
| Ubuntu:18.04:LTS | mozjs52 | 52.3.1-0ubuntu3, 52.8.1-0ubuntu0.18.04.1, 52.9.1-0ubuntu0.18.04.1 |
| Ubuntu:20.04:LTS | mozjs68 | *, 0, 68.5.0-2~fakesync |
Timeline
- Mar 25, 2021 CVE Published
- Apr 14, 2021 EPSS Score
- Jun 6, 2021 EPSS Score
- Jun 11, 2021 EPSS Score
- Aug 24, 2021 EPSS Score
- Oct 26, 2021 EPSS Score
- Dec 27, 2021 EPSS Score
- Jan 6, 2022 EPSS Score
- Feb 4, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- May 1, 2022 EPSS Score
- Jul 3, 2022 EPSS Score
References
- https://ubuntu.com/security/CVE-2021-23986 third-party-advisory
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-10/#CVE-2021-23986 third-party-advisory
- https://ubuntu.com/security/notices/USN-4893-1 vendor-advisory
- https://www.cve.org/CVERecord?id=CVE-2021-23986 third-party-advisory