GnuTLS -- multiple vulnerabilities

SecurityFocus reports:

GnuTLS is prone to multiple remote vulnerabilities:

A remote code-execution vulnerability.
A denial-of-service vulnerability.
A signature-generation vulnerability.
A signature-verification vulnerability.

An attacker can exploit these issues to potentially execute
arbitrary code, trigger denial-of-service conditions, carry
out attacks against data signed with weak signatures, and
cause clients to accept expired or invalid certificates from
servers.