April 11, 2013, 8:31 AM — Thousands of wireless IP cameras connected to the Internet have serious security weaknesses that allow attackers to hijack them and alter their firmware, according to two researchers from security firm Qualys.
The cameras are sold under the Foscam brand in the U.S., but the same devices can be found in Europe and elsewhere with different branding, said Qualys researchers Sergey Shekyan and Artem Harutyunyan, who analyzed the security of the devices and are scheduled to present their findings at the Hack in the Box security conference in Amsterdam on Thursday.
Tutorials provided by the camera vendor contain instructions on how to make the devices accessible from the Internet by setting up port-forwarding rules in routers. Because of this, many such devices are exposed to the Internet and can be attacked remotely, the researchers said.
Finding the cameras is easy and can be done in several ways. One method involves using the Shodan search engine to search for an HTTP header specific to the Web-based user interfaces of the cameras. Such a query will return more than 100,000 devices, the researchers said.
The vendors selling these cameras also have them configured to use their own dynamic DNS services. For example, Foscam cameras get assigned a hostname of the type [two letters and four digits].myfoscam.org. By scanning the entire *.myfoscam.org name space an attacker could identify most Foscam cameras connected to the Internet, the researchers said.
Around two out of every 10 cameras allow users to log in with the default "admin" user name and no password, the researchers said. For the rest that do have user-configured passwords, there are other ways to break in.
One method is to exploit a recently discovered vulnerability in the camera's Web interface that allows remote attackers to obtain a snapshot of the device's memory.
This memory dump will contain the administrator user name and password in clear text along with other sensitive information like Wi-Fi credentials or details about devices on the local network, the researchers said.
Even though the vendor has patched this vulnerability in the latest firmware, 99 percent of Foscam cameras on the Internet are still running older firmware versions and are vulnerable, they said. There is also a way to exploit this vulnerability even with the latest firmware installed if you have operator-level credentials for the camera.
Another method is to exploit a cross-site request forgery (CSRF) flaw in the interface by tricking the camera administrator to open a specifically crafted link. This can be used to add a secondary administrator account to the camera.