The remote host is missing an update to imlib announced via advisory DSA 618-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%20618-1

Pavel Kankovsky discovered that several overflows found in the libXpm library were also present in imlib, an imaging library for X and X11. An attacker could create a carefully crafted image file in such a way that it could cause an application linked with imlib to execute arbitrary code when the file was opened by a victim. The Common Vulnerabilities and Exposures project identifies the following problems: CVE-2004-1025 Multiple heap-based buffer overflows. CVE-2004-1026 Multiple integer overflows. For the stable distribution (woody) these problems have been fixed in version 1.9.14-2woody2. For the unstable distribution (sid) these problems have been fixed in version 1.9.14-17.1. We recommend that you upgrade your imlib packages immediately.