The remote host is missing an update to beaker announced via advisory DSA 2541-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%202541-1

It was discovered that Beaker, a cache and session library for Python, when using the python-crypto backend, is vulnerable to information disclosure due to a cryptographic weakness related to the use of the AES cipher in ECB mode. Systems that have the python-pycryptopp package should not be vulnerable, as this backend is preferred over python-crypto. After applying this update, existing sessions will be invalidated. For the stable distribution (squeeze), this problem has been fixed in version 1.5.4-4+squeeze1. For the testing distribution (wheezy), and the unstable distribution (sid), this problem has been fixed in version 1.6.3-1.1. We recommend that you upgrade your beaker packages.