TP-LINK WVR/WAR/ER phddns.lua new-interface command injection

Summaryinfo

A vulnerability classified as critical has been found in TP-LINK WVR, WAR and ER. This impacts an unknown function of the file phddns.lua. Performing a manipulation of the argument new-interface as part of Variable results in command injection. This vulnerability is reported as CVE-2017-15616. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as critical, was found in TP-LINK WVR, WAR and ER (Wireless LAN Software) (version now known). This affects some unknown processing of the file phddns.lua. The manipulation of the argument new-interface as part of a Variable leads to a command injection vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

TP-Link WVR, WAR and ER devices allow remote authenticated administrators to execute arbitrary commands via command injection in the new-interface variable in the phddns.lua file.

The bug was discovered 01/10/2018. The weakness was disclosed 01/11/2018 as not defined posting (Bugtraq). It is possible to read the advisory at securityfocus.com. This vulnerability is uniquely identified as CVE-2017-15616 since 10/19/2017. It is possible to initiate the attack remotely. Required for exploitation is a authentication. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1202 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $0-$5k.

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

The entries VDB-111744, VDB-111745, VDB-111746 and VDB-111748 are pretty similar. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Wireless LAN Software

Vendor

• TP-LINK

Name

• ER
• WAR
• WVR

License

• commercial

Website

• Vendor: https://www.tp-link.com/

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