CVE-2021-29946
high
CVSS v3
—
CVSS v2
—
VIR risk
8.0
Description
Ports that were written as an integer overflow above the bounds of a 16-bit integer could have bypassed port blocking restrictions when used in the Alt-Svc header. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.
Predictions
Exploit likelihood
20%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2021-29946
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2021-29946.html
Vendor advisory: arch — https://security.archlinux.org/ASA-202104-3
Vendor advisory: arch — https://security.archlinux.org/ASA-202104-4
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| arch | fixed | 78.10.0-1 | |
| sles | affected | | |
| debian | sid | fixed | 88.0-1 |
| debian | bookworm | fixed | 78.10.0esr-1 |
| debian | bullseye | fixed | 78.10.0esr-1 |
| debian | forky | fixed | 78.10.0esr-1 |
| debian | trixie | fixed | 78.10.0esr-1 |
References
Verify integrity in audit chain (admin only). AS-IS.