CVE-2021-23954
high
CVSS v3
—
CVSS v2
—
VIR risk
8.0
Description
Using the new logical assignment operators in a JavaScript switch statement could have caused a type confusion, leading to a memory corruption and a potentially exploitable crash. This vulnerability affects Firefox < 85, Thunderbird < 78.7, and Firefox ESR < 78.7.
Predictions
Exploit likelihood
20%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2021-23954
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2021-23954.html
Vendor advisory: arch — https://security.archlinux.org/ASA-202102-1
Vendor advisory: arch — https://security.archlinux.org/ASA-202102-2
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| arch | fixed | 78.7.0-1 | |
| sles | affected | | |
| debian | sid | fixed | 85.0-1 |
| debian | bookworm | fixed | 78.7.0esr-1 |
| debian | bullseye | fixed | 78.7.0esr-1 |
| debian | forky | fixed | 78.7.0esr-1 |
| debian | trixie | fixed | 78.7.0esr-1 |
References
Verify integrity in audit chain (admin only). AS-IS.