The remote host is missing an update to icedove announced via advisory DSA 1485-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201485-1

Several remote vulnerabilities have been discovered in the Icedove mail client, an unbranded version of the Thunderbird client. The Common Vulnerabilities and Exposures project identifies the following problems: CVE-2008-0412 Jesse Ruderman, Kai Engert, Martijn Wargers, Mats Palmgren and Paul Nickerson discovered crashes in the layout engine, which might allow the execution of arbitrary code. CVE-2008-0413 Carsten Book, Wesley Garland, Igor Bukanov, moz_bug_r_a4, shutdown, Philip Taylor and tgirmann discovered crashes in the Javascript engine, which might allow the execution of arbitrary code. CVE-2008-0415 moz_bug_r_a4 and Boris Zbarsky discovered discovered several vulnerabilities in Javascript handling, which could allow privilege escalation. CVE-2008-0418 Gerry Eisenhaur and moz_bug_r_a4 discovered that a directory traversal vulnerability in chrome: URI handling could lead to information disclosure. CVE-2008-0419 David Bloom discovered a race condition in the image handling of designMode elements, which can lead to information disclosure or potentially the execution of arbitrary code. CVE-2008-0591 Michal Zalewski discovered that timers protecting security-sensitive dialogs (which disable dialog elements until a timeout is reached) could be bypassed by window focus changes through Javascript. For the stable distribution (etch), these problems have been fixed in version 1.5.0.13+1.5.0.15b.dfsg1-0etch1. The Mozilla products in the old stable distribution (sarge) are no longer supported with security updates. We recommend that you upgrade your icedove packages.