Date: Mon, 3 Jan 2011 13:51:11 -0500 (EST) From: Josh Bressers <bressers@...hat.com> To: oss-security@...ts.openwall.com Cc: "Steven M. Christey" <coley@...us.mitre.org>, Nicolas Sebrecht <nicolas.s-dev@...oste.net>, david b <db.pub.mail@...il.com>, Johannes Stezenbach <js@...21.net>, Christoph Höger <choeger@...tu-berlin.de>, John Goerzen <jgoerzen@...plete.org>, Jan Lieskovsky <jlieskov@...hat.com> Subject: Re: Re: CVE Request -- OfflineIMAP -- 1), failed to validate remote SSL server certificate 2), allows SSLv2 protocol ----- Original Message ----- > On Thu, Dec 23, 2010 at 03:43:40PM +0100, Jan Lieskovsky wrote: > > > > I), Didn't check SSL server certificate > > > > Description: > > OfflineIMAP prior commit: > >  > > https://github.com/nicolas33/offlineimap/commit/4f57b94e2333c37c5a7251fc88dfeda9bc0b226a > > > > did not perform SSL server certificate validation, > > even when "ssl = yes" option was specified in the > > configuration file. If an attacker was able to get > > a carefully-crafted certificate signed by a > > Certificate Authority trusted by OfflineIMAP, > > the attacker could use the certificate during a > > man-in-the-middle attack and potentially confuse > > OfflineIMAP into accepting it by mistake. > > > > References: > >  http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=603450 > >  https://bugzilla.redhat.com/show_bug.cgi?id=665382 > > > > First of all, thank you very much Jan and all the Redhat team for > reporting it up to the CVE database. > > The given patch from Sebastian Spaeth has been released in v6.3.2-rc1. > I > encourage distribution maintainers who want this fix to either > > deploy the RC release as is > > or > > backport the fix against the last release they own. > > I expect to release a new stable soon but I still didn't have feedback > from users using SSL. The lack of feedback could mean that > > OfflineIMAP users don't expect SSL to work by still refering to the > documentation they know (stating that SSL checks is not supported) > > or > > they don't hit problems at all. > > So, I'll wait a bit more before releasing the next stable. > > > II), Allows SSLv2 protocol > > > > Description: > > In commit: > >  > > https://github.com/nicolas33/offlineimap/commit/4f57b94e2333c37c5a7251fc88dfeda9bc0b226a > > > > when SSL server certificate validation support was added > > to OfflineIMAP it was still possible to use SSL v2 protocol > > version. Version 2 of SSL protocol version is known > > to be prone to multiple deficiencies, each of them > > having security implications (to mention some of them): > >  http://en.wikipedia.org/wiki/Secure_Sockets_Layer#Security > > > > Thus SSLv2 protocol version should be disabled in OfflineIMAP. > > > > References: > >  http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=606962 > >  https://bugzilla.redhat.com/show_bug.cgi?id=665386 > > True. > > > Could you allocate CVE ids for these issues? (though opened for > > discussion of any / none of them worthy of it) > > As the maintainer of OfflineIMAP, I think both issues should have > their > entry in the CVE List. > As upstream has requested two, here you go: CVE-2010-4532 offlineimap doesn't check SSL server certificate CVE-2010-4533 offlineimap allows sslv2 Thanks. -- JB
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