CVE-2021-23978

high

Description

Mozilla developers reported memory safety bugs present in Firefox 85 and Firefox ESR 78.7. 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 < 86, Thunderbird < 78.8, and Firefox ESR < 78.8.

References

https://bugzilla.mozilla.org/buglist.cgi?bug_id=786797%2C1682928%2C1687391%2C1687597

https://www.mozilla.org/security/advisories/mfsa2021-08/

https://www.mozilla.org/security/advisories/mfsa2021-09/

https://www.mozilla.org/security/advisories/mfsa2021-07/

https://lists.debian.org/debian-lts-announce/2021/03/msg00000.html

https://www.debian.org/security/2021/dsa-4866

https://security.gentoo.org/glsa/202104-09

https://security.gentoo.org/glsa/202104-10

Details

Source: MITRE

Published: 2021-02-26

Updated: 2022-05-03

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