The remote host is missing an update to perl, perl-5.004, perl-5.005 announced via advisory DSA 208-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%20208-1

A security hole has been discovered in Safe.pm which is used in all versions of Perl. The Safe extension module allows the creation of compartments in which perl code can be evaluated in a new namespace and the code evaluated in the compartment cannot refer to variables outside this namespace. However, when a Safe compartment has already been used, there's no guarantee that it is Safe any longer, because there's a way for code to be executed within the Safe compartment to alter its operation mask. Thus, programs that use a Safe compartment only once aren't affected by this bug. This problem has been fixed in version 5.6.1-8.2 for the current stable distribution (woody), in version 5.004.05-6.2 and 5.005.03-7.2 for the old stable distribution (potato) and in version 5.8.0-14 for the unstable distribution (sid). We recommend that you upgrade your Perl packages.