CVE-2023-0637 in TEW-811DRU
Summary
by MITRE • 02/02/2023
A vulnerability, which was classified as critical, was found in TRENDnet TEW-811DRU 1.0.10.0. This affects an unknown part of the file wan.asp of the component Web Management Interface. The manipulation leads to memory corruption. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The identifier VDB-220017 was assigned to this vulnerability.
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Analysis
by VulDB Data Team • 03/01/2023
The vulnerability identified as CVE-2023-0637 represents a critical memory corruption flaw within the TRENDnet TEW-811DRU wireless router firmware version 1.0.10.0. This vulnerability specifically targets the web management interface component, more precisely the wan.asp file which serves as a critical interface for configuring the router's wide area network settings. The flaw exists in the handling of user input within this web interface component, creating a pathway for malicious actors to manipulate the router's memory structures through remote exploitation. The vulnerability's classification as critical indicates the potential for severe impact including complete system compromise and unauthorized access to network resources.
The technical exploitation of this memory corruption vulnerability occurs through the web management interface, which allows attackers to craft malicious input that triggers buffer overflow conditions or other memory manipulation techniques within the wan.asp component. This type of vulnerability falls under the CWE-121 category of stack-based buffer overflow, where insufficient bounds checking allows attackers to overwrite adjacent memory locations. The remote exploitation capability means that adversaries can initiate attacks from outside the network perimeter without requiring physical access to the device, making it particularly dangerous for enterprise and home network environments. The public disclosure of the exploit code (VDB-220017) significantly increases the risk as it provides attackers with readily available tools to leverage this vulnerability.
The operational impact of this vulnerability extends beyond simple unauthorized access, potentially enabling attackers to gain full control over the router's operations, modify network configurations, redirect traffic, or establish persistent backdoors within the network infrastructure. Network administrators face significant risks including data interception, man-in-the-middle attacks, and complete network compromise when this vulnerability remains unpatched. The web management interface being compromised directly affects the router's ability to maintain secure network operations and can lead to widespread network disruption. Organizations relying on TRENDnet TEW-811DRU devices for network connectivity face potential exposure to advanced persistent threats that could use this vulnerability as an initial access point for broader network infiltration activities.
Mitigation strategies for CVE-2023-0637 should prioritize immediate firmware updates from TRENDnet to address the memory corruption vulnerability in the wan.asp component. Network segmentation and access control measures should be implemented to limit exposure of the affected devices to external networks, while monitoring for suspicious network traffic patterns that might indicate exploitation attempts. Regular security audits of network infrastructure should include verification of device firmware versions and patch status to prevent similar vulnerabilities from remaining unaddressed. The ATT&CK framework categorizes this vulnerability under initial access and privilege escalation techniques, making it a critical concern for organizations implementing cybersecurity frameworks that require proactive identification and remediation of such remote code execution vulnerabilities. Network defenders should also consider implementing intrusion detection systems capable of identifying exploitation attempts targeting web management interfaces and establish incident response procedures specifically addressing router compromise scenarios.