The remote host is missing updates announced in advisory CLSA-2005:1030.
Ruby supports safe execution of untrusted code with two mechanisms: safe level and taint flag on objects. Dr. Yutaka Oiwa discovered a vulnerability that allows Ruby methods to bypass these mechanisms. In systems which use this feature, this could be exploited to execute Ruby code beyond the restrictions specified in each safe level.
Solution: The apt tool can be used to perform RPM package upgrades by running 'apt-get update' followed by 'apt-get upgrade'