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Message-ID: <Pine.LNX.4.58.0708142258270.2038@dione>
Date: Tue, 14 Aug 2007 23:03:46 +0200 (CEST)
From: Wojciech Purczynski <cliph@...c.pl>
To: full-disclosure@...ts.grok.org.uk, vulnwatch@...nwatch.org,
bugtraq@...urityfocus.com
Subject: Re: COSEINC Linux Advisory #1: Linux Kernel Parent Process Death
Signal Vulnerability
Small correction - I forgot to add setuid(0) ;)
PARENT CHILD
----------------------------------------------------------------
fork()
prctl(PR_SET_PDEATHSIG)
execve("/bin/setuid-binary")
setuid(0)
exit()'ed or killed
child receives NO signal this time
PARENT CHILD
----------------------------------------------------------------
fork()
prctl(PR_SET_PDEATHSIG)
execve("/bin/setuid-binary")
setuid(0)
execve("/bin/setuid-binary")
exit()'ed or killed
privileged process receives the signal
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