Vulnerability · Published Oct 8, 2020 · Assigned by mozilla
CVE-2020-12401
Medium 4.7
In plain English
A medium-severity security flaw in Firefox from Mozilla. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 26% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)4.7Medium
Exploit odds (30 days)0.3%top 74.2% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | firefox | 80.0-r0 | ALPINE-CVE-2020-12401 |
| Alpine:v3.21 | firefox | 80.0-r0 | ALPINE-CVE-2020-12401 |
| Alpine:v3.22 | firefox | 80.0-r0 | ALPINE-CVE-2020-12401 |
| Alpine:v3.23 | firefox | 80.0-r0 | ALPINE-CVE-2020-12401 |
| Alpine:v3.21 | librewolf | 80.0-r0 | ALPINE-CVE-2020-12401 |
| Alpine:v3.22 | librewolf | 80.0-r0 | ALPINE-CVE-2020-12401 |
| Alpine:v3.23 | librewolf | 80.0-r0 | ALPINE-CVE-2020-12401 |
| Alpine:v3.24 | librewolf | 80.0-r0 | ALPINE-CVE-2020-12401 |
| Alpine:v3.20 | nss | 3.55-r0 | ALPINE-CVE-2020-12401 |
| Alpine:v3.21 | nss | 3.55-r0 | ALPINE-CVE-2020-12401 |
| Alpine:v3.22 | nss | 3.55-r0 | ALPINE-CVE-2020-12401 |
| Alpine:v3.23 | nss | 3.55-r0 | ALPINE-CVE-2020-12401 |
| Alpine:v3.24 | nss | 3.55-r0 | ALPINE-CVE-2020-12401 |
| Debian:12 | nss | 2:3.55-1 | DEBIAN-CVE-2020-12401 |
| Debian:13 | nss | 2:3.55-1 | DEBIAN-CVE-2020-12401 |
| Debian:14 | nss | 2:3.55-1 | DEBIAN-CVE-2020-12401 |
| Rocky Linux:8 | nss | 0:3.53.1-17.el8_3 | RLSA-2021:0538 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | unspecified – before 80 |
| Mozilla | Firefox for Android | unspecified – before 80 |