CVE-2021-29955
firefox-esrVulnerabilityCVSS 5.3Patched
No public exploitation has been reported so far. A fixed version is available (see the table below).
Recommended action: Update to the fixed version listed for your distribution using the native package manager.
Severity metrics
CVSS 3.1 : 5.3 MEDIUM · CVSS 2.0 : 2.6 LOW
Attack vectorNetwork (remote)
Attack complexityHigh
Privileges requiredNone
User interactionRequired
ScopeUnchanged
Confidentiality impactHigh
Integrity impactNone
Availability impactNone
Vector: AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
Affected & fixed versions by distribution
Versions are the native distribution strings (backport-aware): RHEL/Debian/SUSE backport fixes, so compare with the distro version comparator (dpkg / rpm / vercmp), not the upstream version.
| Distribution | Package | Affected | Fixed version | Status |
|---|---|---|---|---|
| Debian:11 | firefox-esr | - | 78.9.0esr-1 | fixed |
| Debian:12 | firefox-esr | - | 78.9.0esr-1 | fixed |
| Debian:13 | firefox-esr | - | 78.9.0esr-1 | fixed |
| Debian:14 | firefox-esr | - | 78.9.0esr-1 | fixed |
| Debian:9 | firefox-esr | - | 78.9.0esr-1~deb9u1 | fixed |
| Debian:10 | firefox-esr | - | 78.9.0esr-1~deb10u1 | fixed |
| Ubuntu:18.04:LTS | firefox | - | 87.0+build3-0ubuntu0.18.04.2 | fixed |