[Cialug] CAP_SYS_CHROOT

Todd Walton tdwalton at gmail.com
Wed Mar 9 16:13:30 UTC 2022


Are there any security implications of giving a process the CAP_SYS_CHROOT
capability? It seems like CAP_SYS_CHROOT's very existence would imply that
the kernel developers consider it something you might *not* want to grant.
But surely a process using chroot could only result in it having the same
or fewer permissions/privileges. Never more.

I understand the argument that "chroot is not a security feature". Yes,
yes. But it couldn't make things worse, could it? In what situations would
I *not* want to grant CAP_SYS_CHROOT?

--
Todd


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