Date: Wed, 20 Feb 2013 09:19:04 +0100 From: Oswald Buddenhagen <ossi@....org> To: oss-security@...ts.openwall.com Subject: isync/mbsync security advisory: missing SSL subject verification (CVE-2013-0289) 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
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