Description
The _gnutls_server_name_recv_params
function in lib/ext_server_name.c in libgnutls in gnutls-serv in
GnuTLS before 2.2.4 does not properly calculate the number of Server
Names in a TLS 1.0 Client Hello message during extension handling,
which allows remote attackers to cause a denial of service (crash)
or possibly execute arbitrary code via a zero value for the length of
Server Names, which leads to a buffer overflow in session resumption
data in the pack_security_parameters function.