CVE-2020-12401

LOW

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

https://bugzilla.mozilla.org/show_bug.cgi?id=1631573

https://www.mozilla.org/security/advisories/mfsa2020-36/

https://www.mozilla.org/security/advisories/mfsa2020-39/

Details

Source: MITRE

Published: 2020-10-08

Updated: 2020-10-26

Type: CWE-327

Risk Information

CVSS v2.0

Base Score: 1.9

Vector: AV:L/AC:M/Au:N/C:P/I:N/A:N

Impact Score: 2.9

Exploitability Score: 3.4

Severity: LOW

CVSS v3.0

Base Score: 4.7

Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Impact Score: 3.6

Exploitability Score: 1

Severity: MEDIUM