Overview
A critical vulnerability has been identified in the popular network product, Totolink LR1200GB version 9.1.0u.6619_B20230130. This vulnerability, classified as CVE-2024-0572, poses a substantial risk to systems and networks using this product, potentially leading to system compromise or data leakage if exploited. This vulnerability not only has a high impact but is also of concern due to the lack of response from the vendor despite early notification about the disclosure.
Vulnerability Summary
CVE ID: CVE-2024-0572
Severity: Critical (CVSS score 8.8)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage
Affected Products
No phone number, email, or personal info required.
Product | Affected Versions
Totolink LR1200GB | 9.1.0u.6619_B20230130
How the Exploit Works
The vulnerability lies in the function setOpModeCfg of the file /cgi-bin/cstecgi.cgi. The flaw allows for the manipulation of the argument pppoeUser, which leads to stack-based buffer overflow. This overflow can be triggered remotely and without any requirement of user interaction or privileged access, making it a severe threat to any system running the affected version of Totolink LR1200GB.
Conceptual Example Code
An attacker could potentially exploit this vulnerability by sending a manipulated HTTP POST request to the target. This could look something like:
POST /cgi-bin/cstecgi.cgi HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
pppoeUser=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA... (till buffer overflows)In this conceptual example, ‘A’s are used to represent the malicious payload. The length of the payload would vary depending on the specific system’s buffer size.
Mitigation Guidance
As of now, the best course of action is to apply the vendor patch once it becomes available. However, given the absence of response from the vendor, users should consider implementing other security measures such as a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) to mitigate the risk posed by this vulnerability temporarily. It is also recommended to monitor any network activity closely and report any suspicious activities to the appropriate personnel immediately.