Description

CVE-2024-55211 describes an authentication bypass vulnerability in Think Router Tk-Rt-Wr135G V3.0.2-X000. Attackers can exploit this flaw by crafting a malicious cookie, allowing them to gain unauthorized access. While the CVSS score is 0, the SOCRadar Vulnerability Risk Score (SVRS) is 30, and the vulnerability is actively exploited in the wild. This indicates a potentially significant risk despite the low CVSS score, requiring further investigation and mitigation.

Key Insights

1. Authentication Bypass: The core issue is a complete bypass of the authentication mechanism, granting attackers potentially full control over the affected router.
2. In The Wild Exploitation: The "In The Wild" tag highlights that this vulnerability is actively being exploited by hackers, increasing the urgency for immediate mitigation. This makes it significantly more dangerous than the CVSS score indicates.
3. Cookie-Based Attack: The vulnerability is triggered via a crafted cookie. This suggests a network-based attack vector, making it easily exploitable remotely, assuming the attacker has network access to the router.
4. SVRS vs CVSS: The discrepancy between the low CVSS score (0) and the SVRS (30) highlights the importance of considering real-world exploitability and threat landscape data. The SVRS takes into account the active exploitation, which the CVSS does not capture effectively in this case.

Mitigation Strategies

1. Firmware Update: Immediately check for and apply any available firmware updates from the vendor (Think Router) that address this vulnerability. This is the most effective long-term solution.
2. Network Segmentation: Isolate the Think Router on a separate network segment if possible, limiting its access to critical resources and reducing the potential impact of a successful exploit.
3. Monitor Network Traffic: Implement network monitoring and intrusion detection systems to identify and alert on any suspicious traffic originating from or targeting the affected router. Specifically, look for unusual cookie-related activity.
4. Access Control Lists (ACLs): Implement strict access control lists (ACLs) on the router to limit access to the administration interface to only authorized IP addresses.

Additional Information

Given the active exploitation and authentication bypass, this vulnerability should be treated as a priority. If users have additional queries regarding this incident, they can use the 'Ask to Analyst' feature, contact SOCRadar directly, or open a support ticket for more information if necessary.