CVE-2023-4578 Information

Description

When calling JS::CheckRegExpSyntax a Syntax Error could have been set which would end in calling convertToRuntimeErrorAndClear. A path in the function could attempt to allocate memory when none is available which would have caused a newly created Out of Memory exception to be mishandled as a Syntax Error. This vulnerability affects Firefox < 117 Firefox ESR < 115.2 and Thunderbird < 115.2.

CVSS Vector

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

Reference

https://www.mozilla.org/security/advisories/mfsa2023-34/ https://bugzilla.mozilla.org/show_bug.cgi?id=1839007 https://www.mozilla.org/security/advisories/mfsa2023-36/ https://www.mozilla.org/security/advisories/mfsa2023-38/

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