The remote host is missing an update to linux-2.6 announced via advisory DSA 2003-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%202003-1

NOTE: This kernel update marks the final planned kernel security update for the 2.6.18 kernel in the Debian release 'etch'. Although security support for 'etch' officially ended on Feburary 15th, 2010, this update was already in preparation before that date. A final update that includes fixes for these issues in the 2.6.24 kernel is also in preparation and will be released shortly. Several vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service or privilege escalation. For details, please visit the referenced security advisories. This update also fixes a regression introduced by a previous security update that caused problems booting on certain s390 systems. For the oldstable distribution (etch), this problem has been fixed in version 2.6.18.dfsg.1-26etch2. We recommend that you upgrade your linux-2.6, fai-kernels, and