full-disclosure - Re: FreeBSD <= 6.1 kqueue() NULL pointer dereference

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Message-ID: <4AACB21D.1020607@freebsd.lublin.pl>
Date: Sun, 13 Sep 2009 10:49:33 +0200
From: Przemyslaw Frasunek <venglin@...ebsd.lublin.pl>
To: full-disclosure@...ts.grok.org.uk, bugtraq@...urityfocus.com
Subject: Re: FreeBSD <= 6.1 kqueue() NULL pointer
	dereference

Przemyslaw Frasunek pisze:
> FreeBSD <= 6.1 suffers from classical check/use race condition on SMP

There is yet another kqueue related vulnerability. It affects 6.x, up to
6.4-STABLE. FreeBSD security team was notified on 29th Aug, but there is no
response until now, so I won't publish any details.

Sucessful exploitation yields local root and allows to exit from jail. For now,
you can see demo on:

http://www.vimeo.com/6554787

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