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Date: Thu, 23 Dec 2010 15:43:40 +0100
From: Jan Lieskovsky <>
To: "Steven M. Christey" <>
CC: oss-security <>,
        Nicolas Sebrecht <>,
        david b <>, Johannes Stezenbach <>,
        Christoph Höger <>,
        John Goerzen <>
Subject: CVE Request -- OfflineIMAP -- 1), failed to validate remote SSL server
 certificate 2), allows SSLv2 protocol

Hello Steve, vendors,

   two issues with security implications have been recently reported against OfflineIMAP:

   I), Didn't check SSL server certificate

   OfflineIMAP prior commit:

   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.


   II), Allows SSLv2 protocol

   In commit:

   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):

   Thus SSLv2 protocol version should be disabled in OfflineIMAP.


Could you allocate CVE ids for these issues? (though opened for
discussion of any / none of them worthy of it)

Thanks && Regards, Jan.
Jan iankko Lieskovsky / Red Hat Security Response Team

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