Vulnerability · Published Feb 26, 2021 · Assigned by mozilla
CVE-2021-23963
Medium 4.3
In plain English
A medium-severity security flaw in Firefox from Mozilla. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 52% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)4.3Medium
Exploit odds (30 days)0.7%top 48.3% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
When sharing geolocation during an active WebRTC share, Firefox could have reset the webRTC sharing state in the user interface, leading to loss of control over the currently granted permission. This vulnerability affects Firefox < 85.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | firefox | 85.0-r0 | ALPINE-CVE-2021-23963 |
| Alpine:v3.21 | firefox | 85.0-r0 | ALPINE-CVE-2021-23963 |
| Alpine:v3.22 | firefox | 85.0-r0 | ALPINE-CVE-2021-23963 |
| Alpine:v3.23 | firefox | 85.0-r0 | ALPINE-CVE-2021-23963 |
| Alpine:v3.21 | librewolf | 85.0-r0 | ALPINE-CVE-2021-23963 |
| Alpine:v3.22 | librewolf | 85.0-r0 | ALPINE-CVE-2021-23963 |
| Alpine:v3.23 | librewolf | 85.0-r0 | ALPINE-CVE-2021-23963 |
| Alpine:v3.24 | librewolf | 85.0-r0 | ALPINE-CVE-2021-23963 |
| Ubuntu:22.04:LTS | mozjs78 | no fix listed | UBUNTU-CVE-2021-23963 |
Affected products (as reported)
References
- https://www.mozilla.org/security/advisories/mfsa2021-03/ x_refsource_MISC
- https://bugzilla.mozilla.org/show_bug.cgi?id=1680793 x_refsource_MISC