The remote host is missing an update to perl announced via advisory USN-794-1.

The problem can be corrected by upgrading your system to the following package versions: Ubuntu 8.04 LTS: libcompress-raw-zlib-perl 2.008-1ubuntu0.1 Ubuntu 8.10: libcompress-raw-zlib-perl 2.011-2ubuntu0.1 perl 5.10.0-11.1ubuntu2.3 Ubuntu 9.04: libcompress-raw-zlib-perl 2.015-1ubuntu0.1 perl 5.10.0-19ubuntu1.1 In general, a standard system upgrade is sufficient to effect the necessary changes. https://secure1.securityspace.com/smysecure/catid.html?in=USN-794-1

It was discovered that the Compress::Raw::Zlib Perl module incorrectly handled certain zlib compressed streams. If a user or automated system were tricked into processing a specially crafted compressed stream or file, a remote attacker could crash the application, leading to a denial of service.