The remote host is missing an update to netatalk announced via advisory DSA 1705-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201705-1

It was discovered that netatalk, an implementation of the AppleTalk suite, is affected by a command injection vulnerability when processing PostScript streams via papd. This could lead to the execution of arbitrary code. Please note that this only affects installations that are configured to use a pipe command in combination with wildcard symbols substituted with values of the printed job. For the stable distribution (etch) this problem has been fixed in version 2.0.3-4+etch1. For the upcoming stable distribution (lenny) this problem has been fixed in version 2.0.3-11+lenny1. For the unstable distribution (sid) this problem has been fixed in version 2.0.4~beta2-1. We recommend that you upgrade your netatalk package.