Linksys Velop 1.1.2.187020 Web Interface cgi-bin/zbtest.cgi command injection

Summaryinfo

A vulnerability was found in Linksys Velop 1.1.2.187020 and classified as problematic. Affected by this issue is some unknown functionality of the file cgi-bin/zbtest.cgi of the component Web Interface. Such manipulation leads to command injection. This vulnerability is listed as CVE-2018-17208. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in Linksys Velop 1.1.2.187020 and classified as problematic. Affected by this issue is an unknown code of the file cgi-bin/zbtest.cgi of the component Web Interface. The manipulation with an unknown input leads to a command injection vulnerability. Using CWE to declare the problem leads to CWE-77. The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. Impacted is integrity. CVE summarizes:

Linksys Velop 1.1.2.187020 devices allow unauthenticated command injection, providing an attacker with full root access, via cgi-bin/zbtest.cgi or cgi-bin/zbtest2.cgi (scripts that can be discovered with binwalk on the firmware, but are not visible in the web interface). This occurs because shell metacharacters in the query string are mishandled by ShellExecute, as demonstrated by the zbtest.cgi?cmd=level&level= substring. This can also be exploited via CSRF.

The bug was discovered 09/19/2018. The weakness was presented 09/19/2018 (Website). The advisory is shared for download at langkjaer.com. This vulnerability is handled as CVE-2018-17208 since 09/19/2018. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1202.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• Linksys

Name

• Velop

Version

• 1.1.2.187020

License

• commercial

Website

• Vendor: https://www.linksys.com/

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