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CVE-2020-12401
During ECDSA signature generation, padding applied in the nonce designed to ensure constant-time scalar multiplication was removed,…
Medium4.7EPSS 0.33%
- Published
- Updated
- Reserved
- Assigned by
- mozilla
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium4.7 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N |
- EPSS (exploitation in 30 days)
- 0.33% · top 74% of all CVEs (6 Nov 2026)
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The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.7.
Weakness
- Timing-attack on ECDSA signature generation
- CWE-203 (opens in a new tab)All about CWE-203 and its CVEs
Affected products
- affected unspecified – < 80
- affected unspecified – < 80
References (4)
- https://www.mozilla.org/security/advisories/mfsa2020-39/ (opens in a new tab)x_transferred
- https://www.mozilla.org/security/advisories/mfsa2020-36/ (opens in a new tab)x_transferred
- https://bugzilla.mozilla.org/show_bug.cgi?id=1631573 (opens in a new tab)x_transferred
- [debian-lts-announce] 20230220 [SECURITY] [DLA 3327-1] nss security update (opens in a new tab)mailing-listx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2020-12401)Record last updated .