The remote host is missing an update to enscript announced via advisory DSA 1670-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201670-1

Several vulnerabilities have been discovered in Enscript, a converter from ASCII text to Postscript, HTML or RTF. The Common Vulnerabilities and Exposures project identifies the following problems: CVE-2008-3863 Ulf Harnhammer discovered that a buffer overflow may lead to the execution of arbitrary code. CVE-2008-4306 Kees Cook and Tomas Hoger discovered that several buffer overflows may lead to the execution of arbitrary code. For the stable distribution (etch), these problems have been fixed in version 1.6.4-11.1. For the upcoming stable distribution (lenny) and the unstable distribution (sid), these problems have been fixed in version 1.6.4-13. We recommend that you upgrade your enscript package.