CVE-2021-29964 Information

Description

A locally-installed hostile program could send WM_COPYDATA messages that Firefox would process incorrectly leading to an out-of-bounds read. This bug only affects Firefox on Windows. Other operating systems are unaffected.. This vulnerability affects Thunderbird < 78.11 Firefox < 89 and Firefox ESR < 78.11.

CVSS Vector

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

Reference

https://bugzilla.mozilla.org/show_bug.cgi?id=1706501 https://www.mozilla.org/security/advisories/mfsa2021-23/ https://www.mozilla.org/security/advisories/mfsa2021-24/ https://www.mozilla.org/security/advisories/mfsa2021-26/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.1