CVE-2020-12400

medium
Published — · Modified —
CVSS v3
CVSS v2
VIR risk
5.5

Description

When converting coordinates from projective to affine, the modular inversion was not performed in constant time, resulting in a possible timing-based side channel attack. This vulnerability affects Firefox < 80 and Firefox for Android < 80.

Predictions

Exploit likelihood
20%
Patch ETA

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: rocky — https://errata.rockylinux.org/RLSA-2021:0538

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2020-12400

OS impact

OSVersionStatusFixed in
debian debiansidfixed80.0-1
rockylinux rocky8fixed
debian debianbookwormfixed2:3.55-1
debian debianbullseyefixed2:3.55-1
debian debianforkyfixed2:3.55-1
debian debiantrixiefixed2:3.55-1

References

Verify integrity in audit chain (admin only). AS-IS.