Date: Wed, 20 Feb 2013 09:39:37 -0700 From: Vincent Danen <vdanen@...hat.com> To: oss-security@...ts.openwall.com Subject: Re: isync/mbsync security advisory: missing SSL subject verification (CVE-2013-0289) * [2013-02-20 09:19:04 +0100] Oswald Buddenhagen wrote: >Christian Schneider <software [at] chschneider [dot] eu> discovered that >isync does no SSL subject (hostname) verification. > >This means that any host with a valid certificate could pretend to be >the wanted host, as long as the certificate store contained the relevant >root certificate. This could be used for man-in-the-middle attacks, which >could be used to steal passwords. > >Workaround: Specify a CertificateFile which contains only the wanted >host's certificate, thus disabling trust chain based verification. Early >versions of isync's SSL support tried to enforce this mode of operation. > >Isync releases 0.4 up to including 1.0.5 are affected. Version 1.0.6 has >been just released to address the issue. > >Download: https://sourceforge.net/projects/isync/files/isync/1.0.6/ >Patch: http://isync.git.sourceforge.net/git/gitweb.cgi?p=isync/isync;a=patch;h=914ede18664980925628a9ed2a73ad05f85aeedb Note that this was disclosed to the distros@ list previously and had been assigned the name CVE-2013-0289 (which the referenced patch notes as well). -- Vincent Danen / Red Hat Security Response Team
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