The remote host is missing an update to mpfr announced via advisory USN-772-1.

The problem can be corrected by upgrading your system to the following package versions: Ubuntu 9.04: lib64mpfr1 2.4.0-1ubuntu3.1 libmpfr1ldbl 2.4.0-1ubuntu3.1 In general, a standard system upgrade is sufficient to effect the necessary changes. https://secure1.securityspace.com/smysecure/catid.html?in=USN-772-1

It was discovered that MPFR improperly handled string lengths in its print routines. If a user or automated system were tricked into processing specially crafted data with applications linked against MPFR, an attacker could cause a denial of service or execute arbitrary code with privileges of the user invoking the program.