CVE-2021-38493

high

Description

Mozilla developers reported memory safety bugs present in Firefox 91 and Firefox ESR 78.13. 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 ESR < 78.14, Thunderbird < 78.14, and Firefox < 92.

References

https://www.mozilla.org/security/advisories/mfsa2021-42/

https://www.mozilla.org/security/advisories/mfsa2021-38/

https://www.mozilla.org/security/advisories/mfsa2021-39/

https://bugzilla.mozilla.org/buglist.cgi?bug_id=1723391%2C1724101%2C1724107

https://security.gentoo.org/glsa/202202-03

https://security.gentoo.org/glsa/202208-14

Details

Source: MITRE

Published: 2021-11-03

Updated: 2022-12-09

Type: CWE-787

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