CVE-2020-12401

MEDIUM

Firefox < 80 - Timing Side-Channel in ECDSA Signature Generation

Title source: llm
STIX 2.1

Description

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.

References (4)

Core 4

Scores

CVSS v3 4.7
EPSS 0.0019
EPSS Percentile 40.2%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Details

CWE
CWE-203
Status published
Products (1)
mozilla/firefox < 80.0 (2 CPE variants)
Published Oct 08, 2020
Tracked Since Feb 18, 2026