https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=121073
--- Comment #7 from ji...@quis.cx --- I remember someone saying this could be exploited using rfork. I don't know why it's not listed in this bug. IIRC the problem was that fd_rdir (root of the processes) was stored in proc->p_fd (struct filedesc) and the P_NOSUGID-flag in struct proc itself. One could use rfork to create a new process with the same descriptor table and call chroot in the child which would flag the child with P_NOSUGID but change to root for the parent as well. The parent doesn't get P_NOSUGID however and will be able to execve a setuid executable with a fake libc. -- You are receiving this mail because: You are the assignee for the bug. _______________________________________________ freebsd-bugs@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-bugs To unsubscribe, send any mail to "freebsd-bugs-unsubscr...@freebsd.org"
