bugtraq - Re: COSEINC Linux Advisory #1: Linux Kernel Parent Process Death Signal Vulnerability

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Message-ID: <Pine.LNX.4.58.0708152328020.10292@dione>
Date: Wed, 15 Aug 2007 23:37:53 +0200 (CEST)
From: Wojciech Purczynski <cliph@...c.pl>
To: Dan Yefimov <dan@...5.lightwave.net.ru>
Cc: bugtraq@...urityfocus.com
Subject: Re: COSEINC Linux Advisory #1: Linux Kernel Parent Process Death
 Signal Vulnerability

> Could you please explain it to me where do you see privilege escalation
> here?

Sending a signal to privileged process is a privilege itself. Under some
circumstances this may lead to other consequences. For example I was able
to code local root exploit using some very common suid binary, although
its usage is somewhat limited.