Date: Wed, 25 Aug 2010 19:18:32 +1200 From: Amos Jeffries <squid3@...enet.co.nz> To: oss-security <oss-security@...ts.openwall.com> CC: "Steven M. Christey" <coley@...us.mitre.org>, Amos Jeffries <amosjeffries@...id-cache.org>, Stephen Thorne <stephen@...rne.id.au> 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: >  http://bugs.squid-cache.org/show_bug.cgi?id=3021 > > Relevant upstream changeset: >  http://bazaar.launchpad.net/~squid/squid/3.1/revision/10072 > Also for use as needed our patch archive copy: http://www.squid-cache.org/Versions/v3/3.1/changesets/squid-3.1-10072.patch > References: >  http://marc.info/?l=squid-users&m=128263555724981&w=2 >  https://bugzilla.redhat.com/show_bug.cgi?id=626927 >  http://bugs.gentoo.org/show_bug.cgi?id=334263 > > Could you allocate CVE id for this issue? > > Amos, Stephen please correct me, if some of  and  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 . > > Thanks && Regards, Jan. > -- > Jan iankko Lieskovsky / Red Hat Security Response Team Henrik covered the rest in your bug report . Amos -- Please be using Current Stable Squid 2.7.STABLE9 or 3.1.7 Beta testers wanted for 220.127.116.11
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