CVE-2020-12401
MEDIUM
4.7
CVSS Score
Published: October 8, 2020 at 12:00 AM UTC
Updated: August 19, 2026 at 03:29 PM UTC
2 products affected across 1 vendorFirefoxFirefox Mobile
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Severity
MEDIUM4.7
Exploit prediction
EPSS 0.3%
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 80v < 80.0
Affected range stops below 80, so it looks safe — our inference, not a vendor statement
Affected range stops below 80.0, so it looks safe — our inference, not a vendor statement
v < 80.0
Affected range stops below 80.0, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (4)
Issue TrackingPermissions RequiredVendor Advisory
Source: [email protected]
https://bugzilla.mozilla.org/show_bug.cgi?id=1631573CVSS
- Attack Vector
- LOCAL
- Complexity
- HIGH
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- NONE
- Availability
- NONE
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-203
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