CVE-2024-41592 is a high-severity vulnerability affecting various DrayTek Vigor devices, including the Vigor3910. This vulnerability allows a stack-based overflow when processing query string parameters, due to improper handling by the GetCGI function. Specifically, the vulnerability is triggered by extraneous ampersand characters and exceptionally long key-value pairs in the input.
With a CVSS score of 8.0, the risk to organizations includes potential unauthorized access and data manipulation, as attackers may leverage this vulnerability to execute arbitrary code. Given the critical nature of the devices affected and their role in network security, organizations should prioritize patching immediately.
The vulnerability was published on October 3, 2024, and impacts devices running firmware versions up to 4.3.2.6. As of now, no public exploit has been confirmed, but the exploitability is assessed to be high, indicating that attackers might target this flaw soon.
Organizations using the affected DrayTek Vigor models should take immediate action to apply available patches. The urgency of this matter cannot be overstated, as successful exploitation could lead to severe security breaches.
Vulnerability Details
The official description of CVE-2024-41592 highlights a stack-based overflow vulnerability present in DrayTek Vigor3910 devices. The vulnerability arises when the device improperly processes certain query string parameters, mainly due to the mishandling of extraneous ampersand characters and long key-value pairs.
This flaw falls under the CWE-121 classification, related to stack-based buffer overruns. With a CVSS score of 8.0, it is categorized as high severity, reflecting its potential impact on confidentiality, integrity, and availability.
Affected products include various firmware versions across multiple Vigor models, including the Vigor1000b, Vigor165, Vigor2133, and Vigor3910, among others. Organizations using these devices must remain vigilant.
Technical Analysis
The root cause of this vulnerability lies in the GetCGI function within the firmware, which fails to adequately validate input parameters. The attack vector is classified as adjacent network, meaning that an attacker must be on the same local network as the target device.
Attack complexity is rated as low, requiring minimal skill to exploit. An attacker only needs low privileges and does not require user interaction to trigger the overflow. If successful, the vulnerability could lead to high confidentiality, integrity, and availability impacts, allowing for unauthorized access or execution of arbitrary code.
Risk & Impact Analysis
The real-world deployment risk associated with CVE-2024-41592 is significant. Given that multiple DrayTek Vigor devices are widely used in various network environments, successful exploitation could allow attackers to gain control over these devices, leading to potential data breaches and network outages.
The blast radius of this vulnerability extends to all organizations utilizing affected models, which can include small businesses and larger enterprises alike. Organizations should assess their exposure and prioritize patching based on their risk profiles.
Urgency for remediation is classified as high due to the potential for exploitation. Organizations should schedule remediation actions as part of their immediate patch management cycles.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The vulnerability affects the following firmware versions for DrayTek devices: Vigor1000b, Vigor165, Vigor166, Vigor2133, Vigor2135, Vigor2620, Vigor2762, Vigor2763, Vigor2765, Vigor2766, Vigor2832, Vigor2860, Vigor2862, Vigor2865, Vigor2866, Vigor2915, Vigor2925, Vigor2926, Vigor2952, Vigor2962, Vigor3220, and Vigor3910. Organizations should ensure they are running the latest firmware to mitigate this vulnerability.
Mitigation & Remediation
DrayTek has released patches for affected firmware versions. Organizations are strongly encouraged to upgrade to the latest firmware versions to address this vulnerability. If immediate patching is not feasible, consider implementing network segmentation to isolate affected devices from untrusted networks.
For further details on patching and security measures, organizations can refer to the penetration testing services to evaluate their security posture.
Detection Guidance
Organizations should monitor network traffic for anomalous behavior indicative of exploitation attempts. Log indicators such as unexpected query strings or excessive use of ampersand characters in HTTP requests may signal an attempt to exploit this vulnerability.
AppSecure Threat Intelligence Insight
CVE-2024-41592 highlights the ongoing need for vigilance in network security. As attackers become more adept at exploiting vulnerabilities, security teams must prioritize timely updates and robust monitoring practices.
This incident reflects a broader trend of vulnerabilities in network devices, necessitating regular security assessments. Organizations are encouraged to adopt a proactive security stance by implementing penetration testing methodology and integrating it into their development lifecycle.
Security teams should also engage in threat modeling to identify potential weaknesses in their network architecture and apply necessary mitigations. For further reading on effective security practices, refer to our vulnerability management program design.
Lastly, organizations should stay informed about emerging threats and vulnerabilities to strengthen their defenses against future attacks.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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