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Firejail TOCTOU Race Condition

Posted by deepcore on February 20, 2021 – 12:46 pm

This program demonstrates a time-of-check-time-of-use TOCTOU vulnerability in Firejail. Winning it causes Firejail to create an insecure overlayfs layout, that is then used to escalate privileges by making /etc/ld.so.preload user writable.


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