full-disclosure - FreeBSD 6.4 pipeclose()/knlist_cleardel() race condition exploit

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Date: Thu, 08 Oct 2009 16:29:05 +0200
From: Przemyslaw Frasunek <venglin@...ebsd.lublin.pl>
To: full-disclosure@...ts.grok.org.uk, bugtraq@...urityfocus.com
Subject: FreeBSD 6.4 pipeclose()/knlist_cleardel() race
	condition exploit

FreeBSD 6.4 and below are vulnerable to race condition between pipeclose() and
knlist_cleardel() resulting in NULL pointer dereference. The following code
exploits vulnerability to run code in kernel mode, giving root shell and
escaping from jail.

http://www.frasunek.com/pipe.txt

The bug was fixed a week ago and official security advisory was issued:

http://security.freebsd.org/advisories/FreeBSD-SA-09:13.pipe.asc

-- 
* Fido: 2:480/124 ** WWW: http://www.frasunek.com ** NICHDL: PMF9-RIPE *
* Jabber ID: venglin@...by.pl ** PGP ID: 2578FCAD ** HAM-RADIO: SQ5JIV *

_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://secunia.com/