Actiontec WCB6200Q 1.2L.03.5 HTTP Server uh_tcp_recv_header buffer overflow

Summaryinfo

A vulnerability identified as critical has been detected in Actiontec WCB6200Q 1.2L.03.5. This issue affects the function uh_tcp_recv_header of the component HTTP Server. This manipulation causes buffer overflow. This vulnerability is handled as CVE-2024-6143. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability classified as very critical was found in Actiontec WCB6200Q 1.2L.03.5. Affected by this vulnerability is the function uh_tcp_recv_header of the component HTTP Server. The manipulation with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Actiontec WCB6200Q uh_tcp_recv_header Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Actiontec WCB6200Q routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the HTTP server. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length buffer. An attacker can leverage this vulnerability to execute code in the context of the HTTP server. Was ZDI-CAN-21414.

The advisory is shared at zerodayinitiative.com. This vulnerability is known as CVE-2024-6143 since 06/18/2024. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/19/2024).

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

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

Productinfo

Vendor

• Actiontec

Name

• WCB6200Q

Version

• 1.2L.03.5

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

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Entryinfo

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

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