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CVE-2019-17026

Incorrect alias information in IonMonkey JIT compiler for setting array elements could lead to a type confusion. We are aware of targeted attacks...

Basic Information

CVE State
PUBLISHED
Reserved Date
September 30, 2019
Published Date
March 02, 2020
Last Updated
February 07, 2025
Vendor
Mozilla
Product
Firefox ESR, Thunderbird, Firefox
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.

CVSS Scores

SSVC Information

Exploitation
active
Technical Impact
total

Exploit Status

Exploited in the Wild
Yes (added 2021-11-03 00:00:00 UTC) Source
Proof of Concept Available
Yes (added 2021-02-24 13:18:54 UTC) Source

References

https://www.mozilla.org/security/advisories/mfsa2020-04/ https://www.mozilla.org/security/advisories/mfsa2020-03/ 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

Known Exploited Vulnerability Information

Source Added Date
CISA 2021-11-03 00:00:00 UTC

Potential Proof of Concepts

Warning: These PoCs have not been tested and could contain malware. Use at your own risk.

lsw29475/CVE-2019-17026

Type: github • Created: 2021-02-24 13:18:54 UTC • Stars: 3

maxpl0it/CVE-2019-17026-Exploit

Type: github • Created: 2020-08-27 19:32:07 UTC • Stars: 48

An exploit for CVE-2019-17026. It pops xcalc and was tested on Ubuntu (x64).