CVE-2021-29984 Information

Description

Instruction reordering resulted in a sequence of instructions that would cause an object to be incorrectly considered during garbage collection. This led to memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 78.13 Thunderbird < 91 Firefox ESR < 78.13 and Firefox < 91.

CVSS Vector

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

Reference

https://www.mozilla.org/security/advisories/mfsa2021-34/ https://www.mozilla.org/security/advisories/mfsa2021-33/ https://www.mozilla.org/security/advisories/mfsa2021-36/ https://www.mozilla.org/security/advisories/mfsa2021-35/ https://bugzilla.mozilla.org/show_bug.cgi?id=1720031 https://security.gentoo.org/glsa/202202-03

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