CVE-2021-29946

high

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.

References

https://www.mozilla.org/security/advisories/mfsa2021-16/

https://www.mozilla.org/security/advisories/mfsa2021-15/

https://www.mozilla.org/security/advisories/mfsa2021-14/

https://bugzilla.mozilla.org/show_bug.cgi?id=1698503

Details

Source: Mitre, NVD

Published: 2021-06-24

Updated: 2021-06-25

Risk Information

CVSS v2

Base Score: 6.8

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P

Severity: Medium

CVSS v3

Base Score: 8.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Severity: High