CVE-2024-6143 Actiontec WCB6200Q uh_tcp_recv_header Buffer Overflow Remote Code Execution Vulnerability
Network-adjacent attackers can execute arbitrary code on Actiontec WCB6200Q routers via a buffer overflow in the HTTP server without authentication.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2024-6143?
CVE-2024-6143 is a high-severity memory corruption vulnerability in Actiontec WCB6200Q, published on 18 Jun 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
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.
Weakness: CWE-120
Which versions are affected by CVE-2024-6143?
It affects 1 product.
Products include Actiontec Wcb6200q Firmware.
How do I fix CVE-2024-6143?
No fix has been published for CVE-2024-6143 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2024-6143 being exploited?
There is no known exploitation of CVE-2024-6143 in the wild and no public exploit code.
Other vulnerabilities in Actiontec WCB6200Q
- CVE-2024-6142 Actiontec WCB6200Q uh_tcp_recv_content Buffer Overflow Remote Code Execution Vulnerability
- CVE-2024-6144 Actiontec WCB6200Q Multipart Boundary Stack-based Buffer Overflow Remote Code Execution Vulnerability
- CVE-2024-6145 Actiontec WCB6200Q Cookie Format String Remote Code Execution Vulnerability
- CVE-2024-6146 Actiontec WCB6200Q uh_get_postdata_withupload Stack-based Buffer Overflow Remote Code Execution Vulnerability
- CVE-2018-10252 Auth bypass in n/a
Sources
Also known as GHSA-c4w8-gf33-r5f3.