CVE-2021-38501

high

Description

Mozilla developers reported memory safety bugs present in Firefox 92 and Firefox ESR 91.1. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 93, Thunderbird < 91.2, and Firefox ESR < 91.2.

References

https://www.mozilla.org/security/advisories/mfsa2021-43/

https://www.mozilla.org/security/advisories/mfsa2021-45/

https://bugzilla.mozilla.org/buglist.cgi?bug_id=1685354%2C1715755%2C1723176

https://www.mozilla.org/security/advisories/mfsa2021-47/

Details

Source: MITRE

Published: 2021-11-03

Updated: 2021-11-04

Risk Information

CVSS v2

Base Score: 6.8

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

Impact Score: 6.4

Exploitability Score: 8.6

Severity: MEDIUM

CVSS v3

Base Score: 8.8

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

Impact Score: 5.9

Exploitability Score: 2.8

Severity: HIGH