CVE-2020-15667 Information

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Reference

https://bugzilla.mozilla.org/show_bug.cgi?id=1653371 https://www.mozilla.org/security/advisories/mfsa2020-36/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.8