CVE-2024-7463 in CP900
Summary
by MITRE • 08/05/2024
A vulnerability classified as critical was found in TOTOLINK CP900 6.3c.566. This vulnerability affects the function UploadCustomModule of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument File leads to 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-273556. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 08/16/2024
The vulnerability identified as CVE-2024-7463 represents a critical buffer overflow flaw within the TOTOLINK CP900 router firmware version 6.3c.566. This issue resides in the UploadCustomModule function of the /cgi-bin/cstecgi.cgi component, making it a significant concern for network security. The vulnerability manifests when an attacker manipulates the File argument parameter, which directly leads to a buffer overflow condition that can compromise the device's integrity. This type of vulnerability falls under CWE-121, which specifically addresses stack-based buffer overflow conditions, and represents a critical weakness in memory management that can be exploited to execute arbitrary code. The attack vector is remotely accessible, meaning that an unauthenticated attacker can potentially exploit this vulnerability without requiring physical access to the device, making it particularly dangerous for network infrastructure.
The operational impact of this vulnerability extends beyond simple device compromise, as it can enable attackers to gain unauthorized access to the router's administrative functions and potentially escalate privileges within the network. The buffer overflow condition creates an opportunity for attackers to overwrite critical memory locations, potentially allowing for code execution with elevated privileges. This vulnerability aligns with ATT&CK technique T1059.007, which covers the use of command and scripting interpreters, as the compromised device could be used to execute malicious commands or serve as a foothold for further network infiltration. The fact that this vulnerability has been publicly disclosed and is known to be exploitable increases the risk significantly, as it provides threat actors with a readily available attack method against affected devices. The lack of vendor response to early disclosure attempts further compounds the security risk, leaving users without official patches or mitigations.
Security professionals should immediately implement network segmentation and access controls to limit exposure of affected devices, while also monitoring network traffic for signs of exploitation attempts. The recommended mitigation strategies include disabling unnecessary services and ports, implementing network access control lists, and conducting thorough network scans to identify potentially compromised devices. Organizations should also consider deploying intrusion detection systems that can detect exploitation attempts targeting this specific vulnerability. Given the remote exploitability and public availability of the exploit, it is crucial for network administrators to prioritize patching or replacement of affected TOTOLINK CP900 devices as soon as possible. The vulnerability's classification as critical according to CVSS scoring systems indicates that immediate action is required, as the potential for widespread compromise exists, particularly in environments where these devices are used for network infrastructure management. Additional defensive measures such as regular firmware updates, network monitoring, and security awareness training should be implemented to reduce the overall attack surface and improve incident response capabilities.