CVE-2021-29976
Description
Mozilla developers reported memory safety bugs present in code shared between Firefox and Thunderbird. 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 Thunderbird < 78.12, Firefox ESR < 78.12, and Firefox < 90.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: rocky — https://errata.rockylinux.org/RLSA-2021:2743
Vendor advisory: rocky — https://errata.rockylinux.org/RLSA-2021:2883
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2021-29976
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2021-29976.html
Vendor advisory: arch — https://security.archlinux.org/ASA-202107-20
Vendor advisory: arch — https://security.archlinux.org/ASA-202107-21
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| arch | fixed | 78.12.0-1 | |
| sles | affected | | |
| debian | sid | fixed | 90.0-1 |
| debian | bookworm | fixed | 78.12.0esr-1 |
| debian | bullseye | fixed | 78.12.0esr-1 |
| debian | forky | fixed | 78.12.0esr-1 |
| debian | trixie | fixed | 78.12.0esr-1 |
| rocky | 8 | fixed | |
References
Verify integrity in audit chain (admin only). AS-IS.