“A backdoor has been found in devices made by a Chinese tech firm specializing in VoIP products,” reports TechRadar. An anonymous reader quotes their article:
Security outfit Trustwave made the discovery of a hidden backdoor in DblTek’s devices which was apparently put there to allow the manufacturer access to said hardware — but of course, it’s also open to being exploited by other malicious parties. The backdoor is in the Telnet admin interface of DblTek-branded devices, and potentially allows an attacker to remotely open a shell with root privileges on the target device.
What’s perhaps even more worrying is that when Trustwave contacted DblTek regarding the backdoor last autumn — multiple times — patched firmware was eventually released at the end of December. However, rather than removing the flaw, the vendor simply made it more difficult to access and exploit. And further correspondence with the Chinese company has apparently fallen on deaf ears.
The firmware with the hole “is present on almost every GSM-to-VoIP device which DblTek makes,” and Trustwave “found hundreds of these devices on the net, and many other brands which use the same firmware, so are equally open to exploit.”
Read more of this story at Slashdot.