TP-LINK TL-WR841N Web Service Request Header buffer overflow

Summaryinfo

A vulnerability marked as critical has been reported in TP-LINK TL-WR841N. This issue affects some unknown processing of the component Web Service. Performing a manipulation as part of Request Header results in buffer overflow. This vulnerability was named CVE-2019-17147. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability classified as critical has been found in TP-LINK TL-WR841N (Router Operating System) (the affected version is unknown). This affects an unknown code of the component Web Service. The manipulation as part of a Request Header leads to a buffer overflow vulnerability. CWE is classifying the issue as CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

This vulnerability allows remote attackers to execute arbitrary code on affected installations of TP-LINK TL-WR841N routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the web service, which listens on TCP port 80 by default. When parsing the Host request header, the process does not properly validate the length of user-supplied data prior to copying it to a fixed-length static buffer. An attacker can leverage this vulnerability to execute code in the context of the admin user. Was ZDI-CAN-8457.

The weakness was presented 01/07/2020. This vulnerability is uniquely identified as CVE-2019-17147 since 10/04/2019. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available.

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

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Productinfo

Type

• Router Operating System

Vendor

• TP-LINK

Name

• TL-WR841N

License

• commercial

Website

• Vendor: https://www.tp-link.com/

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CPE 2.2info

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