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Date: Mon, 17 Oct 2011 12:07:38 +0200
From: Marcus Meissner <meissner@...e.de>
To: oss-security@...ts.openwall.com
Subject: Re: CVE request: double-free vulnerability in logsurfer

On Mon, Oct 17, 2011 at 12:02:29PM +0200, Timo Warns wrote:
> Gregor Kopf of Recurity Labs GmbH found a double-free vulnerability in
> Logsurfer affecting the function prepare_exec(). The vulnerability is caused by
> an insufficient treatment of an error condition that is returned by the
> function get_word() when it is unable to correctly parse its input.
> 
> The following versions of logsurfer are affected:
> 
>  Logsurfer 1.5b and previous versions
>  Logsurfer+ 1.7 and previous versions
> 
> A patch is available at http://logsurfer.git.sourceforge.net/git/gitweb.cgi?p=logsurfer/logsurfer;a=commit;h=07983748da9ea3d4954b80f02fed692fe21b1134

How can this be exploited?

It seems to happen in the argument handling and I doubt an attacker can inject arguments?

Ciao, Marcus

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