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Date: Tue, 15 Jan 2013 22:49:36 -0700
From: Kurt Seifried <kseifried@...hat.com>
To: oss-security@...ts.openwall.com
CC: Florian Weimer <fw@...eb.enyo.de>
Subject: Re: pam-pgsql NULL password handling issue

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On 01/15/2013 12:23 PM, Florian Weimer wrote:
> Lucas Clemente Vella discovered that pam-pgsql (aka pam_pgsql)
> might allow login with any password the SQL query for the password
> returns NULL.
> 
> Bug report: <https://sourceforge.net/p/pam-pgsql/bugs/13/> Patch:
> <https://sourceforge.net/u/lvella/pam-pgsql/ci/9361f5970e5dd90a747319995b67c2f73b91448c/>
>
>  As usual, I'm not sure if this constitutes a security bug, but
> we'll probably fix this nevertheless if we get the opportunity.

Please use CVE-2013-0188 for this issue.

In general I think we take a strict line on password parsing, I can
see programs that might create new accounts with a NULL password
especially on the theory that the front end/etc forces a password to
be entered that isn't NULL.


- -- 
Kurt Seifried Red Hat Security Response Team (SRT)
PGP: 0x5E267993 A90B F995 7350 148F 66BF 7554 160D 4553 5E26 7993

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