CVE-2024-7180 in A3600R
Summary
by MITRE • 07/29/2024
A vulnerability classified as critical has been found in TOTOLINK A3600R 4.1.2cu.5182_B20201102. This affects the function setPortForwardRules of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument comment leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The identifier VDB-272601 was assigned to this vulnerability. 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 • 08/23/2024
The vulnerability identified as CVE-2024-7180 represents a critical buffer overflow flaw in the TOTOLINK A3600R router firmware version 4.1.2cu.5182_B20201102. This issue resides within the setPortForwardRules function of the /cgi-bin/cstecgi.cgi file, which serves as a core component for managing port forwarding rules on the device. The vulnerability specifically manifests when processing the comment argument, which is commonly used to provide descriptive information about port forwarding configurations. The buffer overflow occurs when an attacker supplies a malformed comment parameter that exceeds the allocated buffer space, potentially allowing for arbitrary code execution or system compromise.
This vulnerability presents significant operational risks as it enables remote exploitation without requiring authentication, making it particularly dangerous in network environments where these routers are deployed. The attack vector is straightforward since the affected function is accessible via web interface requests, allowing malicious actors to craft specially crafted HTTP requests that trigger the buffer overflow condition. The disclosure of this vulnerability through public exploit code means that attackers with basic technical knowledge can leverage this flaw to gain unauthorized access to affected devices. According to industry standards, this vulnerability maps directly to CWE-121, which describes heap-based buffer overflow conditions, and aligns with ATT&CK technique T1210 for exploiting known vulnerabilities in network infrastructure devices.
The impact of successful exploitation extends beyond simple privilege escalation, as compromised routers can serve as entry points for broader network attacks, enabling man-in-the-middle scenarios, traffic interception, or as launchpads for lateral movement within corporate networks. Network administrators face the challenge of securing devices that may be deployed in unattended locations where firmware updates are infrequent or impossible to implement. The lack of vendor response to early disclosure attempts compounds the risk, leaving users without official patches or mitigation guidance during the critical period when the vulnerability is publicly known. Organizations should immediately implement network segmentation measures to isolate affected devices and monitor for suspicious network activity. The vulnerability also highlights the importance of firmware update management policies and the need for regular security assessments of network infrastructure components. Given the critical nature of this vulnerability, immediate action is required to either patch affected systems or implement compensating controls to prevent unauthorized access to network resources.