CVE-2008-1949

The _gnutls_recv_client_kx_message function in lib/gnutls_kx.c in libgnutls
in gnutls-serv in GnuTLS before 2.2.4 continues to process Client Hello
messages within a TLS message after one has already been processed, which
allows remote attackers to cause a denial of service (NULL dereference and
crash) via a TLS message containing multiple Client Hello messages, aka
GNUTLS-SA-2008-1-2.