CVEs-PoC/2021/CVE-2021-26910.md

CVE-2021-26910

Description

Firejail before 0.9.64.4 allows attackers to bypass intended access restrictions because there is a TOCTOU race condition between a stat operation and an OverlayFS mount operation.

POC

Reference

• http://www.openwall.com/lists/oss-security/2021/02/09/1
• https://github.com/netblue30/firejail/commit/97d8a03cad19501f017587cc4e47d8418273834b
• https://github.com/netblue30/firejail/releases/tag/0.9.64.4
• https://unparalleled.eu/publications/2021/advisory-unpar-2021-0.txt

Github

• https://github.com/netblue30/firejail
• https://github.com/orgTestCodacy11KRepos110MB/repo-1121-firejail
• https://github.com/sailfishos-mirror/firejail