CVE-2023-30356

Vulnerability

The Shenzen Tenda Technology IP Camera CP3 running firmware version V11.10.00.2211041355 lacks support for an integrity check during the firmware update process [1]. This missing check (CWE-353) allows an attacker to supply a crafted firmware image that is accepted without verification. The vulnerability is present in the update mechanism of the camera.

Exploitation

An attacker with network access to the camera can trigger the update procedure using a maliciously-forged firmware image [1]. No authentication is required if the update endpoint is exposed, or the attacker may leverage hard-coded credentials (CWE-798) to gain access. The attacker simply sends the crafted firmware to the camera's update interface, which then installs it.

Impact

Successful exploitation allows the attacker to overwrite the official firmware with a malicious version, gaining persistent control over the device [1]. The modification is permanent and can prevent future legitimate updates, leading to full compromise of the camera's functionality and potential use in further attacks.

Mitigation

As of the publication date (2023-05-10), no official fix has been released by Shenzen Tenda Technology [1]. Users should isolate the camera on a separate network segment, disable remote update capabilities if possible, and monitor for vendor patches. The device may be end-of-life; consider replacing it with a supported model.