CVE-2017-15616

Vulnerability

CVE-2017-15616 is a command injection vulnerability in TP-Link WVR, WAR, and ER series devices. The flaw resides in the phddns.lua file, where the new-interface variable is not properly sanitized before being passed to a system command. Affected firmware versions are those prior to the vendor's security update [1].

Exploitation

To exploit, an attacker must have authenticated administrative access to the device's web interface. No additional privileges are required beyond standard admin credentials. The attacker sends a crafted HTTP request to the vulnerable endpoint with a malicious payload in the new-interface parameter, such as a command concatenated with shell metacharacters [1].

Impact

Successful exploitation allows the attacker to execute arbitrary operating system commands with root privileges. This can lead to full compromise of the device, including data exfiltration, installation of backdoors, or use in further network attacks [1].

Mitigation

TP-Link released firmware updates to address this issue. Users should update to the latest firmware version for their device as provided on the TP-Link support site. If a patch cannot be applied, restrict administrative access to trusted networks only [1].