TP-LINK WVR/WAR/ER interface_wan.lua iface command injection

Summaryinfo

A vulnerability classified as critical was found in TP-LINK WVR, WAR and ER. Affected is an unknown function of the file interface_wan.lua. Executing a manipulation of the argument iface as part of Variable can lead to command injection. This vulnerability appears as CVE-2017-15617. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability has been found in TP-LINK WVR, WAR and ER (Wireless LAN Software) (version unknown) and classified as critical. This vulnerability affects an unknown function of the file interface_wan.lua. The manipulation of the argument iface as part of a Variable leads to a command injection vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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

The bug was discovered 01/10/2018. The weakness was presented 01/11/2018 as not defined posting (Bugtraq). The advisory is shared for download at securityfocus.com. This vulnerability was named CVE-2017-15617 since 10/19/2017. The attack can be initiated remotely. The successful exploitation requires a single authentication. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1202.

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.

See VDB-111744, VDB-111745, VDB-111746 and VDB-111747 for similar entries. Once again VulDB remains the best source 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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Once again VulDB remains the best source for vulnerability data.

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