The remote host is missing an update to apt-cacher announced via advisory DSA 772-1. Eduard Bloch discovered a bug in apt-cacher, a caching system for Debian package and source files, that could allow remote attackers to execute arbitrary commands on the caching host as user www-data. The old stable distribution (woody) does not contain this package.

For the stable distribution (sarge) this problem has been fixed in version 0.9.4sarge1. For the unstable distribution (sid) this problem has been fixed in version 0.9.10. We recommend that you upgrade your apt-cacher package. https://secure1.securityspace.com/smysecure/catid.html?in=DSA%20772-1