A flaw was found in libssh. The API function "ssh_get_hexa()" is vulnerable to a denial of service when processing zero-length input. This can be exploited remotely by an attacker during GSSAPI (Generic Security Service Application Program Interface) authentication if the server's logging verbosity is set to "SSH_LOG_PACKET (3)" or higher. Successful exploitation could lead to a self-Denial of Service of the per-connection daemon process.