CVE-2021-29945 Information

Description

The WebAssembly JIT could miscalculate the size of a return type which could lead to a null read and result in a crash. Note: This issue only affected x86-32 platforms. Other platforms are unaffected.. This vulnerability affects Firefox ESR < 78.10 Thunderbird < 78.10 and Firefox < 88.

CVSS Vector

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

Reference

https://bugzilla.mozilla.org/show_bug.cgi?id=1700690 https://www.mozilla.org/security/advisories/mfsa2021-15/ https://www.mozilla.org/security/advisories/mfsa2021-16/ https://www.mozilla.org/security/advisories/mfsa2021-14/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

6.5