The vulnerability identified as CVE-2024-36650 affects the TOTOLINK AC1200 Wireless Dual Band Gigabit Router firmware version A3100R V4.1.2cu.5247_B20211129. This vulnerability allows attackers to exploit a buffer overflow due to the lack of input validation in the cgi function `setNoticeCfg`. Specifically, the length of the user input string `NoticeUrl` is not properly checked, leading to potential denial-of-service attacks through malicious HTTP or MQTT requests.
With a CVSS score of 7.5, this vulnerability is classified as high severity. The implications of this vulnerability are significant, as it can lead to service interruptions for users of the affected router. Organizations using this firmware must act swiftly to address this issue.
Currently, there is no public exploit confirmed for this vulnerability, but the risk to organizations includes potential service outages and loss of availability. Organizations should prioritize patching immediately.
Given the ease of exploitation and the high potential impact, this vulnerability requires urgent attention from IT and network security teams to ensure that the affected devices are secured.
Vulnerability Details
CVE-2024-36650 is a high-severity vulnerability found in the TOTOLINK AC1200 Wireless Dual Band Gigabit Router firmware A3100R V4.1.2cu.5247_B20211129. The vulnerability arises from improper handling of user input in the cgi function `setNoticeCfg` located in `/lib/cste_modules/system.so`. The absence of length checks on the `NoticeUrl` input leads to a buffer overflow condition. This can be exploited to execute denial-of-service attacks.
The CVSS score for this vulnerability is 7.5, indicating a high severity level. This score reflects a combination of factors, including the attack vector being network-based, the low complexity of the attack, and the high impact on availability.
The affected product is the TOTOLINK AC1200 Wireless Dual Band Gigabit Router with the specified firmware version. The vulnerability was publicly disclosed on June 11, 2024.
This vulnerability corresponds to CWE-120, which relates to buffer copy without checking size of input. Security experts recommend immediate action to remediate this issue.
Technical Analysis
The root cause of CVE-2024-36650 lies in the improper validation of user input within the firmware's cgi functions. Attackers may leverage this flaw to send specially crafted payloads that exceed the expected length of the `NoticeUrl` input, resulting in a buffer overflow.
The primary attack vector is the network, allowing remote attackers to exploit this vulnerability without requiring physical access to the device. The complexity of the attack is considered low, as it does not require any special privileges or user interaction.
The vulnerability has a high impact on availability, as successful exploitation could lead to the router becoming unresponsive or crashing, thereby interrupting service for all connected devices.
No privileges are required to exploit this vulnerability, and user interaction is not necessary, making it easier for attackers to target vulnerable systems.
Risk & Impact Analysis
Organizations utilizing the TOTOLINK AC1200 Wireless Dual Band Gigabit Router must recognize the real-world risks associated with CVE-2024-36650. The potential for denial-of-service attacks poses significant threats to operational continuity, especially for businesses relying on stable network connections.
Given the high CVSS score, the urgency of remediation is clear. Organizations should address this vulnerability in their priority patch cycle to mitigate the risk of service disruptions and maintain customer trust.
The blast radius for this vulnerability can extend to all users of the affected router model, which may include both residential and business customers. Therefore, the impact could be widespread if not addressed promptly.
Organizations should prioritize patching immediately to prevent unauthorized access and denial-of-service conditions.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected version of the firmware is A3100R V4.1.2cu.5247_B20211129. Organizations should ensure that this version is patched to mitigate the identified vulnerability.
Mitigation & Remediation
Organizations should prioritize patching their devices with the latest firmware updates provided by TOTOLINK. For the affected AC1200 Wireless Dual Band Gigabit Router, upgrading to the latest version will mitigate the risk associated with CVE-2024-36650.
In case the patch is not immediately available, organizations should implement network controls to restrict access to the device and monitor for unusual activity that may indicate an attempted exploitation of this vulnerability.
Engaging in regular security assessments, such as penetration testing, can also help identify and remediate similar vulnerabilities in the future.
Detection Guidance
To detect potential exploitation attempts related to this vulnerability, organizations should monitor network logs for anomalies, particularly unexpected HTTP or MQTT requests targeting the affected router.
Additionally, any changes in system behavior or performance should be investigated promptly to ensure that they are not indicative of an ongoing attack.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2024-36650 lies in its demonstration of the vulnerabilities present in widely used consumer routers. Security teams should note the patterns of exploitation that arise from inadequate input validation.
Lessons learned from this vulnerability highlight the necessity for robust input validation mechanisms across all firmware and software components.
Organizations are encouraged to review their security practices and engage in proactive measures, such as implementing a comprehensive application security assessment, to identify potential weaknesses in their systems before attackers can exploit them.
The ongoing evolution of attack strategies necessitates a responsive and adaptive security posture to defend against similar threats in the future.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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