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

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Date: Tue, 14 Aug 2007 22:18:38 +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


> I'm not sure this is a real security issue. If some process has the same
> effective UID as the given one, the former can always send any signal to
> the latter. Thus the behaviour you described is IMHO normal.

It becomes a security issue whenever suid process drops user's UIDs.