A vulnerability classified as critical was found in TP-LINK TL-WVR and TL-WAR (Router Operating System) (version now known). Affected by this vulnerability is the function get_device_byif in the library /usr/lib/lua/luci/controller/admin/wportal.lua. The manipulation of the argument interface with an unknown input 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. The summary by CVE is:

TP-Link TL-WVR and TL-WAR devices allow remote authenticated users to execute arbitrary commands via shell metacharacters in the interface field of an admin/wportal command to cgi-bin/luci, related to the get_device_byif function in /usr/lib/lua/luci/controller/admin/wportal.lua in uhttpd.

The bug was discovered 12/19/2017. The weakness was shared 12/19/2017 (Website). The advisory is shared at github.com. This vulnerability is known as CVE-2017-17757 since 12/19/2017. The attack can be launched remotely. Required for exploitation is a single authentication. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1202 for this issue.

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

The entry VDB-110810 is related to this item.

Productinfo

Type

• Router Operating System

Vendor

• TP-LINK

Name

• TL-WAR
• TL-WVR

License

• commercial

CPE 2.3info

• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍

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