CVE-2025-50608 in WF2880
Summary
by MITRE • 08/13/2025
A buffer overflow vulnerability has been discovered in Netis WF2880 v2.1.40207 in the FUN_00471994 function of the cgitest.cgi file. Attackers can trigger this vulnerability by controlling the value of wl_base_set in the payload, which can cause the program to crash and potentially lead to a Denial of Service (DoS) attack.
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Analysis
by VulDB Data Team • 08/14/2025
The buffer overflow vulnerability identified as CVE-2025-50608 resides within the Netis WF2880 router firmware version 2.1.40207, specifically within the cgitest.cgi component. This vulnerability manifests in the FUN_00471994 function where improper input validation allows attackers to manipulate the wl_base_set parameter in crafted payloads. The flaw represents a classic buffer overflow condition that occurs when the program writes more data to a fixed-length buffer than it can accommodate, leading to memory corruption and potential system instability. The vulnerability is particularly concerning as it exists in a network device that serves as a critical gateway for network communication, making it an attractive target for malicious actors seeking to disrupt network services.
The technical exploitation of this vulnerability follows a well-established pattern that aligns with CWE-121, which describes stack-based buffer overflow conditions. When an attacker crafts a payload containing an oversized value for the wl_base_set parameter, the cgitest.cgi script fails to properly validate the input length before copying it into a predetermined memory buffer. This failure allows the overflow to overwrite adjacent memory locations, potentially corrupting program execution flow, stack pointers, or other critical data structures. The vulnerability is classified as a remote code execution risk due to the potential for memory corruption to be leveraged for more sophisticated attacks, though the immediate impact is primarily manifested as a denial of service condition that can render the affected router inoperable.
The operational impact of CVE-2025-50608 extends beyond simple service disruption to encompass broader network reliability concerns. A successful exploitation can cause the router to crash and reboot continuously, effectively creating a denial of service scenario that disrupts all network communications passing through the device. Network administrators may experience significant downtime as the affected router becomes unavailable, potentially affecting multiple users or critical network infrastructure. The vulnerability's presence in a widely deployed router model means that numerous network environments could be simultaneously compromised, creating cascading effects that extend far beyond the immediate device. This type of vulnerability also aligns with ATT&CK technique T1499.004, which covers network disruption through service availability attacks, as the DoS condition can be leveraged to deny access to network resources.
Mitigation strategies for this vulnerability should prioritize immediate firmware updates from Netis to address the buffer overflow condition in the cgitest.cgi component. Network administrators should implement network segmentation to limit the potential impact of exploitation and monitor for unusual traffic patterns that might indicate attempted exploitation. Input validation should be strengthened at multiple layers including the router's web interface and any external access points that might allow modification of the wl_base_set parameter. The vulnerability demonstrates the importance of proper bounds checking and secure coding practices as outlined in OWASP Top Ten and the CERT/CC secure coding guidelines. Additionally, network monitoring solutions should be configured to detect anomalous behavior in router management interfaces, as the exploitation of this vulnerability would likely generate specific traffic patterns that could be identified through behavioral analysis. Given the nature of the vulnerability, implementing access controls to limit who can interact with the cgitest.cgi interface would provide an additional layer of defense against unauthorized exploitation attempts.