oss-security - Re: openldap DoS

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Date: Wed, 2 Jul 2008 08:48:02 +0200
From: Ludwig Nussel <ludwig.nussel@...e.de>
To: oss-security@...ts.openwall.com
Subject: Re: openldap DoS

Josh Bressers wrote:
> On 30 June 2008, Ludwig Nussel wrote:
> > Remote unauthenticated attackers can trigger an assertion in the ASN.1 BER
> > decoding of openlap and crash the server:
> > http://www.openldap.org/its/index.cgi/Software%20Bugs?id=5580;selectid=5580
> > 
> 
> The patch is here it seems:
> http://www.openldap.org/devel/cvsweb.cgi/libraries/liblber/io.c.diff?r1=1.120&r2=1.121&hideattic=1&sortbydate=0

Looks like the change was broken. Citing our maintainer from bugzilla:

--- Comment #7 from Ralf Haferkamp <rhafer@...ell.com>  2008-07-02 00:38:08 MDT ---
The OpenLDAP commit log just turned up this:

-------------8<-----------------------------
Update of /repo/OpenLDAP/pkg/ldap/libraries/liblber

Modified Files:
        io.c  1.121 -> 1.122

Log Message:
ITS#5580: Revert prev commit, failed on byte-at-a-time input. Different
approach used here.


CVS Web URLs:
  http://www.openldap.org/devel/cvsweb.cgi/libraries/liblber/
    http://www.openldap.org/devel/cvsweb.cgi/libraries/liblber/io.c
------------->8-----------------------------
The thread discussing those changes starts here:
http://www.openldap.org/lists/openldap-devel/200807/msg00000.html

cu
Ludwig

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