Some commands may be executed without authentication via TCP/37777 protocol.
CVE-2013-6117 (Dahua DVR 2.608.0000.0 and 2.608.GV00.0 allows remote attackers to bypass authentication and obtain sensitive information including user credentials, change user passwords, clear log files, and perform other actions via a request to TCP port 37777.)
CVE-2013-3615 (Dahua DVR appliances use a password-hash algorithm with a short hash length, which makes it easier for context-dependent attackers to discover cleartext passwords via a brute-force attack.)
CVE-2013-3614 (Dahua DVR appliances have a small value for the maximum password length, which makes it easier for remote attackers to obtain access via a brute-force attack.)
CVE-2013-3613 (Dahua DVR appliances do not properly restrict UPnP requests, which makes it easier for remote attackers to obtain access via vectors involving a replay attack against the TELNET port.)
CVE-2013-3612 (Dahua DVR appliances have a hardcoded password for (1) the root account and (2) an unspecified "backdoor" account, which makes it easier for remote attackers to obtain administrative access via authorization requests involving (a) ActiveX, (b) a standalone client, or (c) unknown other vectors.)