Vulnerability · Published Oct 8, 2020 · Assigned by mozilla
CVE-2020-12400
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 19% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)4.7Medium
Exploit odds (30 days)0.3%top 80.7% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | firefox | 80.0-r0 | ALPINE-CVE-2020-12400 |
| Alpine:v3.21 | firefox | 80.0-r0 | ALPINE-CVE-2020-12400 |
| Alpine:v3.22 | firefox | 80.0-r0 | ALPINE-CVE-2020-12400 |
| Alpine:v3.23 | firefox | 80.0-r0 | ALPINE-CVE-2020-12400 |
| Alpine:v3.21 | librewolf | 80.0-r0 | ALPINE-CVE-2020-12400 |
| Alpine:v3.22 | librewolf | 80.0-r0 | ALPINE-CVE-2020-12400 |
| Alpine:v3.23 | librewolf | 80.0-r0 | ALPINE-CVE-2020-12400 |
| Alpine:v3.24 | librewolf | 80.0-r0 | ALPINE-CVE-2020-12400 |
| Alpine:v3.20 | nss | 3.55-r0 | ALPINE-CVE-2020-12400 |
| Alpine:v3.21 | nss | 3.55-r0 | ALPINE-CVE-2020-12400 |
| Alpine:v3.22 | nss | 3.55-r0 | ALPINE-CVE-2020-12400 |
| Alpine:v3.23 | nss | 3.55-r0 | ALPINE-CVE-2020-12400 |
| Alpine:v3.24 | nss | 3.55-r0 | ALPINE-CVE-2020-12400 |
| Debian:12 | nss | 2:3.55-1 | DEBIAN-CVE-2020-12400 |
| Debian:13 | nss | 2:3.55-1 | DEBIAN-CVE-2020-12400 |
| Debian:14 | nss | 2:3.55-1 | DEBIAN-CVE-2020-12400 |
| 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 |