oss-security - potential OpenPAM vulnerability

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Message-ID: <20111108155647.GC3561@suse.de>
Date: Tue, 8 Nov 2011 16:56:47 +0100
From: Sebastian Krahmer <krahmer@...e.de>
To: oss-security@...ts.openwall.com
Subject: potential OpenPAM vulnerability

Hi,

OpenPAM, until recently, was not filtering the service argument of
pam_start() invocations. This can lead to a root compromise.
Note that Linux-PAM is entirely different as forbids anything with '/'
inside.

Please see 

http://c-skills.blogspot.com/2011/11/openpam-trickery.html

for more discussion and PoC.
This most likely affects FreeBSD and Solaris via the kcheckpass
vector.

regards,
Sebastian

-- 

~ perl self.pl
~ $_='print"\$_=\47$_\47;eval"';eval
~ krahmer@...e.de - SuSE Security Team

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