A remote attacker is able to crash the application or force TCP connections to BIND to remain in CLOSE_WAIT status leading to denial of service on the affected host. Furthermore the cache could become poisoned leading to queries being made to the wrong servers, which might also result in false information being returned to clients.
An attacker is able to provide a malicious AMD64 ELF binary that when opened by a victim may execute arbitrary code on the affected host.
A remote attacker is able to use a specially crafted input to crash an application that is using zlib or potentially execute arbitrary code on the affected host.
A local attacker is able to crash the process or elevate privileges on the affected host.
A man-in-the-middle attacker is able to inject arbitrary SQL queries when a connection is first established, despite the use of SSL certificate verification and encryption.