A Privilege Context Switching issue exists in join.c in Firejail 0.9.68. By crafting a bogus Firejail container that is accepted by the Firejail setuid-root program as a join target, a local attacker can enter an environment in which the Linux user namespace is still the initial user namespace, the NO_NEW_PRIVS prctl is not activated, and the entered mount namespace is under the attacker's control. In this way, the filesystem layout can be adjusted to gain root privileges through execution of available setuid-root binaries such as su or sudo.
| Vulnerable Product | Search on Vulmon | Subscribe to Product |
|---|---|---|
firejail project firejail 0.9.68 |
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fedoraproject fedora 35 |
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fedoraproject fedora 36 |
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fedoraproject fedora 37 |
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debian debian linux 9.0 |
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debian debian linux 10.0 |
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