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Date: Fri, 18 Jan 2013 13:04:08 -0700
From: Kurt Seifried <kseifried@...hat.com>
To: oss-security@...ts.openwall.com
CC: Jan Lieskovsky <jlieskov@...hat.com>,
"Steven M. Christey" <coley@...us.mitre.org>,
Tomas Hozza <thozza@...hat.com>, Josh Stone <jistone@...hat.com>
Subject: Re: CVE Request -- dnsmasq: Incomplete fix for the
CVE-2012-3411 issue
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On 01/18/2013 06:31 AM, Jan Lieskovsky wrote:
> Hello Kurt, Steve, vendors,
>
> the CVE-2012-3411 identifier has been originally assigned to the
> following issue:
>
> When dnsmasq is used in conjunctions with certain configurations of
> libvirtd, network packets from prohibited networks (e.g. packets
> that should not be passed in) may be sent to the dnsmasq
> application and processed. This can result in DNS amplification
> attacks for example. [1]
> http://www.openwall.com/lists/oss-security/2012/07/12/5
>
> Later it was found: [2]
> https://bugzilla.redhat.com/show_bug.cgi?id=894486 [3]
> https://bugzilla.redhat.com/show_bug.cgi?id=894486#c3
>
> the upstream patch for CVE-2012-3411 it not to be working
> properly, as it still allowed (from [3]):
>
> * replies to remote TCP-protocol based DNS queries (UDP protocol
> ones were corrected, but TCP ones not) from prohibited networks,
> when the --bind-dynamic option was used,
>
> * when --except-interface lo option was used dnsmasq didn't answer
> local or remote UDP DNS queries, but still allowed TCP protocol
> based DNS queries,
>
> * when --except-interface lo option was not used local / remote TCP
> DNS queries were also still answered by dnsmasq.
>
> Could you allocate a new CVE identifier for this? (as an incomplete
> fix for CVE-2012-3411 issue)
>
> Thank you && Regards, Jan. -- Jan iankko Lieskovsky / Red Hat
> Security Response Team
Please use CVE-2013-0198 for this issue.
- --
Kurt Seifried Red Hat Security Response Team (SRT)
PGP: 0x5E267993 A90B F995 7350 148F 66BF 7554 160D 4553 5E26 7993
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