Incorrect alias information in IonMonkey JIT compiler for setting array elements could lead to a type confusion. We are aware of targeted attacks in the wild abusing this flaw. This vulnerability affects Firefox ESR < 68.4.1, Thunderbird < 68.4.1, and Firefox < 72.0.1.
https://www.mozilla.org/security/advisories/mfsa2020-03/
https://www.mozilla.org/security/advisories/mfsa2020-04/
https://bugzilla.mozilla.org/show_bug.cgi?id=1607443
https://security.gentoo.org/glsa/202003-02
https://usn.ubuntu.com/4335-1/
http://packetstormsecurity.com/files/162568/Firefox-72-IonMonkey-JIT-Type-Confusion.html
Source: MITRE
Published: 2020-03-02
Updated: 2022-11-16
Type: CWE-843
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
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