The remote host is missing an update to horde2 announced via advisory DSA 1034-1. Several remote vulnerabilities have been discovered in the Horde web application framework, which may lead to the execution of arbitrary web script code. The Common Vulnerabilities and Exposures project identifies the following problems: CVE-2006-1260 Null characters in the URL parameter bypass a sanity check, which allowed remote attackers to read arbitrary files, which allowed information disclosure. CVE-2006-1491 User input in the help viewer was passed unsanitised to the eval() function, which allowed injection of arbitrary web code. The old stable distribution (woody) doesn't contain horde2 packages.
For the stable distribution (sarge) these problems have been fixed in version 2.2.8-1sarge2. The unstable distribution (sid) does no longer contain horde2 packages. We recommend that you upgrade your horde2 package. https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201034-1