The remote host is missing an update to tar announced via advisory USN-709-1.

The problem can be corrected by upgrading your system to the following package versions: Ubuntu 6.06 LTS: tar 1.15.1-2ubuntu2.3 Ubuntu 7.10: tar 1.18-2ubuntu1.1 In general, a standard system upgrade is sufficient to effect the necessary changes. https://secure1.securityspace.com/smysecure/catid.html?in=USN-709-1

Dmitry V. Levin discovered a buffer overflow in tar. If a user or automated system were tricked into opening a specially crafted tar file, an attacker could crash tar or possibly execute arbitrary code with the privileges of the user invoking the program.