CVE-2020-15667

firefox: Invalid name length could result in a heap buffer overflow, leading to memory corruption

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Severity

Low

Red Hat Product Security

8.8

CVSS 3.1

Review impact separately from score.

Published · August 25, 2020

Updated · November 22, 2025

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.

Statement

Firefox and thunderbird packages shipped with Red Hat Enterprise Linux do not enable automatic updates. Therefore are not affected by this flaw.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 8.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CWE-122 · Heap-based Buffer Overflow