CVE-2020-15667
HIGHFirefox < 80.0 - Out-of-bounds Write via MAR Update File Processing
Title source: llmDescription
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.
References (2)
Core 2
Core References
Release Notes, Vendor Advisory x_refsource_misc
https://www.mozilla.org/security/advisories/mfsa2020-36/
Issue Tracking, Permissions Required, Vendor Advisory x_refsource_misc
https://bugzilla.mozilla.org/show_bug.cgi?id=1653371
Scores
CVSS v3
8.8
EPSS
0.0089
EPSS Percentile
75.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Details
CWE
CWE-787
Status
published
Products (1)
mozilla/firefox
< 80.0
Published
Oct 01, 2020
Tracked Since
Feb 18, 2026