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Date: Wed, 25 Aug 2010 19:18:32 +1200
From: Amos Jeffries <>
To: oss-security <>
CC: "Steven M. Christey" <>, 
 Amos Jeffries <>,
 Stephen Thorne <>
Subject: Re: CVE Request -- Squid v3.1.6 -- DoS (crash) while processing large
 DNS replies with no IPv6 resolver present

Jan Lieskovsky wrote:
> Hi Steve, vendors,
>   Stephen Thorne reported a buffer overread flaw in the way Squid proxy 
> caching server
> processed large DNS replies in cases, when no IPv6 resolver was present.
> A remote attacker could provide DNS reply with large amount of data,
> leading to denial of service (squid server crash).
> Upstream bug report:
>   [1]
> Relevant upstream changeset:
>   [2]

Also for use as needed our patch archive copy:

> References:
>   [3]
>   [4]
>   [5]
> Could you allocate CVE id for this issue?
> Amos, Stephen please correct me, if some of [1] and [2] doesn't 
> correspond to:
> "One regression introduced with 3.1.6 when contacting IPv4-only DNS
> resolvers opens a small but exploitable DoS vulnerability."
> issue mentioned in [3].
> Thanks && Regards, Jan.
> -- 
> Jan iankko Lieskovsky / Red Hat Security Response Team

Henrik covered the rest in your bug report [4].

Please be using
   Current Stable Squid 2.7.STABLE9 or 3.1.7
   Beta testers wanted for

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