Vulnerability · Published Oct 1, 2020 · Assigned by mozilla
CVE-2020-15667
High 8.8
In plain English
A high-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 1.6% (higher than 77% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)8.8High
Exploit odds (30 days)1.6%top 23.4% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
When processing a MAR update file, after the signature has been validated, an invalid name length could result in a heap overflow, leading to memory corruption and potentially arbitrary code execution. Within Firefox as released by Mozilla, this issue is only exploitable with the Mozilla-controlled signing key. This vulnerability affects Firefox < 80.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | firefox | 80.0-r0 | ALPINE-CVE-2020-15667 |
| Alpine:v3.21 | firefox | 80.0-r0 | ALPINE-CVE-2020-15667 |
| Alpine:v3.22 | firefox | 80.0-r0 | ALPINE-CVE-2020-15667 |
| Alpine:v3.23 | firefox | 80.0-r0 | ALPINE-CVE-2020-15667 |
| Alpine:v3.21 | librewolf | 80.0-r0 | ALPINE-CVE-2020-15667 |
| Alpine:v3.22 | librewolf | 80.0-r0 | ALPINE-CVE-2020-15667 |
| Alpine:v3.23 | librewolf | 80.0-r0 | ALPINE-CVE-2020-15667 |
| Alpine:v3.24 | librewolf | 80.0-r0 | ALPINE-CVE-2020-15667 |
Affected products (as reported)
References
- https://www.mozilla.org/security/advisories/mfsa2020-36/ x_refsource_MISC
- https://bugzilla.mozilla.org/show_bug.cgi?id=1653371 x_refsource_MISC