TP-LINK WVR/WAR/ER pptp_client.lua new-mppeencryption command injection

Summaryinfo

A vulnerability was found in TP-LINK WVR, WAR and ER. It has been classified as critical. This issue affects some unknown processing of the file pptp_client.lua. Performing a manipulation of the argument new-mppeencryption as part of Variable results in command injection. This vulnerability was named CVE-2017-15622. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability classified as critical has been found in TP-LINK WVR, WAR and ER (Wireless LAN Software) (unknown version). This affects an unknown code block of the file pptp_client.lua. The manipulation of the argument new-mppeencryption 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-mppeencryption variable in the pptp_client.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 at securityfocus.com. This vulnerability is uniquely identified as CVE-2017-15622 since 10/19/2017. It is possible to initiate the attack remotely. The requirement for exploitation is a authentication. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1202 for this issue.

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. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Wireless LAN Software

Vendor

• TP-LINK

Name

• ER
• WAR
• WVR

License

• commercial

Website

• Vendor: https://www.tp-link.com/

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion