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Fix from PR #2757:

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execve() clears the P_SUGID process flag in execve() if the binary
executed does not have suid or sgid permission bits set.

This also happens when the effective uid is different from the real
uid or the effective gid is different from the real gid. Under
these circumstances, the process still has set id privileges and
the P_SUGID flag should not be cleared.

Submitted by:	Tor Egge <Tor.Egge@idt.ntnu.no>
This commit is contained in:
David Greenman 1997-02-19 03:51:34 +00:00
parent 5dfbf82ffb
commit e47bda0730
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=22913
1 changed files with 3 additions and 1 deletions
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4
sys/kern/kern_exec.c
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@ -285,7 +285,9 @@ interpret:
p->p_ucred->cr_groups[0] = attr.va_gid;
p->p_flag |= P_SUGID;
} else {
p->p_flag &= ~P_SUGID;
if (p->p_ucred->cr_uid == p->p_cred->p_ruid &&
p->p_ucred->cr_gid == p->p_cred->p_rgid)
p->p_flag &= ~P_SUGID;
}
/*