CVE-2020-12401

During ECDSA signature generation, padding applied in the nonce designed to ensure constant-time scalar multiplication was removed, resulting in variable-time execution dependent on secret data. This vulnerability affects Firefox < 80 and Firefox for Android < 80.

• CWE-203

• https://bugzilla.mozilla.org/show_bug.cgi?id=1631573Issue Tracking, Permissions Required, Vendor Advisory
• https://lists.debian.org/debian-lts-announce/2023/02/msg00021.html
• https://www.mozilla.org/security/advisories/mfsa2020-36/Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2020-39/Vendor Advisory
• https://bugzilla.mozilla.org/show_bug.cgi?id=1631573Issue Tracking, Permissions Required, Vendor Advisory
• https://lists.debian.org/debian-lts-announce/2023/02/msg00021.html
• https://www.mozilla.org/security/advisories/mfsa2020-36/Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2020-39/Vendor Advisory

Published

Oct 8, 2020

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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