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Date: Mon, 31 Oct 2011 14:20:54 -0600
From: Kurt Seifried <>
CC: Jan Lieskovsky <>,
        "Steven M. Christey" <>,
        Henrik Nordstrom <>,
        Jiri Skala <>
Subject: Re: CVE Request -- Squid v3.1.16 -- Invalid free by
 processing CNAME DNS record pointing to another CNAME record pointing to
 an empty A-record

On 10/31/2011 11:21 AM, Jan Lieskovsky wrote:
> Hello Steve, vendors,
>   an invalid free flaw was found in the way Squid proxy caching server
> processed DNS requests, where one CNAME record pointed to another CNAME
> record pointing to an empty A-record. A remote attacker could issue a
> specially-crafted DNS request, leading to denial of service (squid
> daemon abort).
Please use CVE-2011-4096 for this issue

> Upstream bug report:
> [1]
> Relevant upstream patch:
> [2]
> References:
> [3]
> [4]
> [5]
> [6]
> Could you allocate a CVE id for this? (cc-ed Henrik and Jiri
> for their opinion / comments too, if this should be considered
> a security issue or not)

I'd say so, in the past we have: CVE-2010-2951
<>, etc. Lots
of similar ones.
> Thank you && Regards, Jan.
> -- 
> Jan iankko Lieskovsky / Red Hat Security Response Team


-Kurt Seifried / Red Hat Security Response Team

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