CVE-2018-12640

Vulnerability

The webService binary on Insteon HD IP Camera White 2864-222 contains a buffer overflow vulnerability when parsing the pid, pwd, or usr parameters in HTTP GET requests on port 34100. The binary is an ARM executable that handles the camera's web interface. The overflow occurs due to insufficient bounds checking on the parameter values. Affected firmware versions are those shipped with the 2864-222 model; the camera is a rebrand of Foscam hardware [1].

Exploitation

An attacker can exploit this vulnerability by sending a crafted HTTP GET request to the camera's web interface on TCP port 34100. No authentication is required, as the webService binary processes the request before any login check. The attacker must have network access to the camera. By providing an overly long value for the pid, pwd, or usr key, the attacker triggers a buffer overflow in the get_value_key function [1].

Impact

Successful exploitation allows an attacker to overwrite adjacent memory, potentially leading to arbitrary code execution on the device. This could give the attacker full control over the camera, including the ability to view video streams, modify settings, or use the device as a pivot point in the network. The impact is high, as the camera is often placed on internal networks [1].

Mitigation

As of the publication date (2018-06-23), no official firmware patch has been released by Insteon. Users are advised to restrict network access to the camera's web interface (port 34100) to trusted hosts only, and to consider placing the device on a separate VLAN or behind a firewall. If the camera is no longer supported, replacement with a patched model may be necessary [1].