CVE-2021-23995

high

Description

When Responsive Design Mode was enabled, it used references to objects that were previously freed. We presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.

References

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=1699835

Details

Source: MITRE

Published: 2021-06-24

Updated: 2021-07-02

Type: CWE-672

Risk Information

CVSS v2

Base Score: 5.1

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

Impact Score: 6.4

Exploitability Score: 4.9

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