TP-LINK WVR/WAR/ER pptp_server.lua lcpechointerval command injection

Summaryinfo

A vulnerability marked as critical has been reported in TP-LINK WVR, WAR and ER. Affected is an unknown function of the file pptp_server.lua. Performing a manipulation of the argument lcpechointerval as part of Variable results in command injection. This vulnerability is cataloged as CVE-2017-15628. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in TP-LINK WVR, WAR and ER (Wireless LAN Software) (the affected version is unknown). It has been classified as critical. This affects an unknown code of the file pptp_server.lua. The manipulation of the argument lcpechointerval 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 lcpechointerval variable in the pptp_server.lua file.

The bug was discovered 01/10/2018. The weakness was shared 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-2017-15628 since 10/19/2017. It is possible to initiate the attack remotely. A authentication is needed for exploitation. 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-111747 are related to this item. Be aware that VulDB is the high quality 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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