The remote host is missing an update to libapache-mod-python announced via advisory DSA 452-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%20452-1

The Apache Software Foundation announced that some versions of mod_python contain a bug which, when processing a request with a malformed query string, could cause the corresponding Apache child to crash. This bug could be exploited by a remote attacker to cause a denial of service. For the current stable distribution (woody) this problem has been fixed in version 2:2.7.8-0.0woody2. For the unstable distribution (sid), this problem has been fixed in version 2:2.7.10-1. We recommend that you update your libapache-mod-python package.