When processing callbacks that occurred during window flushing in the parent process, the associated window may die; causing a use-after-free condition. This could have led to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox ESR < 68.10, Firefox < 78, and Thunderbird < 68.10.0.
https://www.mozilla.org/security/advisories/mfsa2020-24/
https://www.mozilla.org/security/advisories/mfsa2020-25/
https://bugzilla.mozilla.org/show_bug.cgi?id=1643874
https://www.mozilla.org/security/advisories/mfsa2020-26/
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00023.html
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00026.html
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00027.html
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00049.html
https://usn.ubuntu.com/4421-1/
Source: MITRE
Published: 2020-07-09
Updated: 2023-01-27
Type: CWE-416
Base Score: 9.3
Vector: AV:N/AC:M/Au:N/C:C/I:C/A:C
Impact Score: 10
Exploitability Score: 8.6
Severity: HIGH
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