CVE-2020-12400

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.

CVSS Metrics

• v3.1•MEDIUM•Score: 4.7CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
• v2.0•LOW•Score: 1.2AV:L/AC:H/Au:N/C:P/I:N/A:N

EPSS Trends

Current EPSS score: 0.15%• Percentile: 35%

Techniques & Countermeasures

• CWE-203•Observable Discrepancy

  The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor.

Affected Systems

• mozilla•firefox

  < 80.0 | ≥ unspecified, < 80

• mozilla•firefox for android

  ≥ unspecified, < 80

References (4)

• https://www.mozilla.org/security/advisories/mfsa2020-39/
• https://www.mozilla.org/security/advisories/mfsa2020-36/
• https://bugzilla.mozilla.org/show_bug.cgi?id=1623116
• https://lists.debian.org/debian-lts-announce/2023/02/msg00021.html