A new post on The Register details a vulnerability in D-Link consumer-grade products that provides unauthenticated access to the units’ admin interfaces.
The backdoor means an attacker could take over all of the user-controllable functions of the popular home routers, which includes the DIR-100, DI-524, DI-524UP, DI-604S, DI-604UP, DI-604+ and TM-G5240 units. According to the post on the /DEV/TTYS0 blog, a couple of Planex routers are also affected, since they use the same firmware.
A Binwalk extract of the D-Link DIR-100 firmware revealed that an unauthenticated user needs only change their user agent string to xmlset_roodkcableoj28840ybtide to access the router’s Web interface with no login required.
Read the entire article here.