CVE-2019-17026

high

Description

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.

References

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

Details

Source: MITRE

Published: 2020-03-02

Updated: 2021-05-13

Type: CWE-843

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