CVE-2024-4125 in W15E
Summary
by MITRE • 04/24/2024
A vulnerability has been found in Tenda W15E 15.11.0.14 and classified as critical. This vulnerability affects the function formSetStaticRoute of the file /goform/setStaticRoute. The manipulation of the argument staticRouteIndex leads to stack-based buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-261868. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.
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Analysis
by VulDB Data Team • 01/16/2025
The vulnerability identified as CVE-2024-4125 represents a critical stack-based buffer overflow flaw in the Tenda W15E 15.11.0.14 router firmware. This vulnerability resides within the formSetStaticRoute function located in the /goform/setStaticRoute file, making it a prime target for remote exploitation. The flaw specifically manifests when the staticRouteIndex argument is manipulated, creating conditions that allow an attacker to overwrite adjacent memory locations on the stack. This type of vulnerability falls under CWE-121, which categorizes stack-based buffer overflow conditions where insufficient bounds checking permits buffer overflows to occur in stack memory regions. The attack vector is particularly concerning as it enables remote exploitation without requiring physical access or authentication, making it accessible to threat actors anywhere on the network.
The operational impact of this vulnerability extends beyond simple remote code execution capabilities, as it provides attackers with the means to completely compromise the affected router's functionality. When an attacker successfully exploits this buffer overflow, they can manipulate the program's execution flow by overwriting return addresses and function pointers stored on the stack. This allows for arbitrary code execution within the router's context, potentially enabling attackers to install persistent backdoors, modify network routing configurations, or even gain access to the underlying operating system. The vulnerability's classification as critical by the vendor indicates the severity of potential consequences, including complete network compromise and unauthorized access to sensitive network infrastructure. The fact that this vulnerability has been publicly disclosed and is known to be exploitable further amplifies the risk to organizations and individuals using affected Tenda W15E devices.
Security professionals should note that this vulnerability aligns with ATT&CK technique T1059.007, which covers the use of command and scripting interpreter for remote access and persistence mechanisms. The compromised router could serve as a persistent foothold for attackers to conduct further network reconnaissance, establish command and control channels, or launch attacks against other devices within the network. The lack of vendor response to early disclosure attempts creates additional risk, as there is no official patch or mitigation available, leaving affected users vulnerable to exploitation. Organizations should immediately implement network segmentation and monitoring to detect potential exploitation attempts, while also considering network access controls to limit exposure of affected devices. The vulnerability demonstrates the critical importance of firmware security and the need for regular security assessments of network infrastructure devices, particularly those with web-based management interfaces that are frequently targeted by attackers.