The remote host is missing an update to the system as announced in the referenced advisory.
The following package is affected: gnupg
CVE-2003-0971 GnuPG (GPG) 1.0.2, and other versions up to 1.2.3, creates ElGamal sign+encrypt keys using the same key component for encryption as for signing, which allows attackers to determine the private key from a signature.
Solution: Update your system with the appropriate patches or software upgrades.