cve/2020/CVE-2020-26950.md

CVE-2020-26950

Description

In certain circumstances, the MCallGetProperty opcode can be emitted with unmet assumptions resulting in an exploitable use-after-free condition. This vulnerability affects Firefox < 82.0.3, Firefox ESR < 78.4.1, and Thunderbird < 78.4.2.

POC

Reference

• http://packetstormsecurity.com/files/166175/Firefox-MCallGetProperty-Write-Side-Effects-Use-After-Free.html
• http://packetstormsecurity.com/files/166175/Firefox-MCallGetProperty-Write-Side-Effects-Use-After-Free.html
• https://bugzilla.mozilla.org/show_bug.cgi?id=1675905
• https://bugzilla.mozilla.org/show_bug.cgi?id=1675905

Github

• https://github.com/ARPSyndicate/cvemon
• https://github.com/cookiengineer/bananaphone