The remote host is missing an update to glibc announced via advisory DSA 149-2.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%20149-2

Wolfram Gloger discovered that the bugfix from DSA 149-1 unintentially replaced potential integer overflows in connection with malloc() with more likely divisions by zero. This called for an update. For completeness the original security advisory said: An integer overflow bug has been discovered in the RPC library used by GNU libc, which is derived from the SunRPC library. This bug could be exploited to gain unauthorized root access to software linking to this code. The packages below also fix integer overflows in the malloc code. This is fixed in version 2.2.5-11.2 for the current stable distribution (woody) by using a patch from the stable glibc-2_2 branch by Wolfgang and in version 2.1.3-24 for the old stable release (potato). We recommend that you upgrade your libc6 packages.