common.c in infosvr in ASUS WRT firmware 3.0.0.4.376_1071, 3.0.0.376.2524-g0013f52, and other versions, as used in RT-AC66U, RT-N66U, and other routers, does not properly check the MAC address for a request, which allows remote attackers to bypass authentication and execute arbitrary commands via a NET_CMD_ID_MANU_CMD packet to UDP port 9999. NOTE: this issue was incorrectly mapped to CVE-2014-10000, but that ID is invalid due to its use as an example of the 2014 CVE ID syntax change.

References

• https://nvd.nist.gov/vuln/detail/CVE-2014-9583
• https://github.com/jduck/asus-cmd
• https://support.t-mobile.com/docs/DOC-21994
• http://packetstormsecurity.com/files/129815/ASUSWRT-3.0.0.4.376_1071-LAN-Backdoor-Command-Execution.html
• http://www.exploit-db.com/exploits/35688
• https://www.exploit-db.com/exploits/44524