CVE-2021-29946 Information

Description

Ports that were written as an integer overflow above the bounds of a 16-bit integer could have bypassed port blocking restrictions when used in the Alt-Svc header. 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:H/I:H/A:H

Reference

https://www.mozilla.org/security/advisories/mfsa2021-15/ https://www.mozilla.org/security/advisories/mfsa2021-16/ https://www.mozilla.org/security/advisories/mfsa2021-14/ https://bugzilla.mozilla.org/show_bug.cgi?id=1698503

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