The remote host is missing an update to icedove announced via advisory DSA 2025-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%202025-1

Several remote vulnerabilities have been discovered in the Icedove mail client, an unbranded version of the Thunderbird mail client. The Common Vulnerabilities and Exposures project identifies the following problems: CVE-2009-2408 Dan Kaminsky and Moxie Marlinspike discovered that icedove does not properly handle a '\0' character in a domain name in the subject's Common Name (CN) field of an X.509 certificate (MFSA 2009-42). CVE-2009-2404 Moxie Marlinspike reported a heap overflow vulnerability in the code that handles regular expressions in certificate names (MFSA 2009-43). CVE-2009-2463 monarch2020 discovered an integer overflow n a base64 decoding function (MFSA 2010-07). CVE-2009-3072 Josh Soref discovered a crash in the BinHex decoder (MFSA 2010-07). CVE-2009-3075 Carsten Book reported a crash in the JavaScript engine (MFSA 2010-07). CVE-2010-0163 Ludovic Hirlimann reported a crash indexing some messages with attachments, which could lead to the execution of arbitrary code (MFSA 2010-07). For the stable distribution (lenny), these problems have been fixed in version 2.0.0.24-0lenny1. Due to a problem with the archive system it is not possible to release all architectures. The missing architectures will be installed into the archive once they become available. For the testing distribution squeeze and the unstable distribution (sid), these problems will be fixed soon. We recommend that you upgrade your icedove packages.