oss-security - Re: CVE Request: avahi DoS

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Message-ID: <1313128021.1201161277484569732.JavaMail.root@zmail01.collab.prod.int.phx2.redhat.com>
Date: Fri, 25 Jun 2010 12:49:29 -0400 (EDT)
From: Josh Bressers <bressers@...hat.com>
To: oss-security@...ts.openwall.com
Cc: Lennart Poettering <lennart@...ttering.net>, coley <coley@...re.org>
Subject: Re: CVE Request: avahi DoS

Please use CVE-2010-2244

Thanks.

-- 
    JB


----- "Ludwig Nussel" <ludwig.nussel@...e.de> wrote:

> Hi,
> 
> avahi crashes if it receives a bad packet (broken checksum)
> immediately followed by a good packet. In that case FIONREAD returns
> zero size for the bad packet. avahi doesn't consider that an error
> and calls recvmsg() which succeeds and returns the good packet which
> has a non-zero length of course. This discrepancy causes an assert()
> to fail and avahi terminates.
> 
> The problem was acknowledged by upstream (Lennart) but no fix
> was commited so far. I've attached my patch proposal.
> 
> cu
> Ludwig
> 
> -- 
>  (o_   Ludwig Nussel
>  //\   
>  V_/_  http://www.suse.de/
> SUSE LINUX Products GmbH, GF: Markus Rex, HRB 16746 (AG Nuernberg)

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