The NETGEAR WNR2000v5 router contains a buffer overflow in the hidden_lang_avi parameter when invoking the URL /apply.cgi?/lang_check.html. This vulnerability allows an unauthenticated attacker to execute arbitrary code remotely, posing a significant risk to network security.
With a CVSS score of 9.8, this vulnerability is classified as critical. The potential for remote code execution means that attackers can gain unauthorized access, leading to severe consequences for affected organizations. The urgency for defenders to act is paramount.
Organizations should prioritize patching immediately. The exploitation status is confirmed, with known exploits available, emphasizing the need for swift action to mitigate risks.
Given the critical nature of this vulnerability, it is essential for organizations to assess their exposure and implement the necessary updates as soon as possible.
Vulnerability Details
The NETGEAR WNR2000v5 router is affected by a buffer overflow vulnerability that can be exploited remotely. The CVSS 3.1 vector string indicates a network attack vector with low complexity and no privileges required. The severity is underscored by the potential for high confidentiality, integrity, and availability impacts.
The vulnerability was published on January 30, 2017, and is classified under CWE-120, which corresponds to buffer errors. Organizations running the affected firmware versions are at risk and should take immediate action.
Technical Analysis
The root cause of this vulnerability stems from improper validation of the hidden_lang_avi parameter. An attacker can exploit this vulnerability by sending specially crafted requests to the vulnerable URL, leading to a buffer overflow.
The attack vector is network-based, with low attack complexity, as no authentication is required, and no user interaction is needed. The confidentiality, integrity, and availability impacts are all rated as high, indicating a significant threat.
Risk & Impact Analysis
The real-world risk associated with this vulnerability is considerable. Organizations deploying the NETGEAR WNR2000v5 router are exposed to remote code execution, which could lead to unauthorized access to sensitive data and systems. The potential blast radius is substantial, affecting not only individual devices but also the broader network.
Given the critical severity and active exploitation status, organizations must assess their environment and prioritize remediation efforts based on the CVSS score and KEV status.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | Yes |
Ransomware Use | No |
Affected Versions
The vulnerability affects multiple firmware versions for various NETGEAR router models, including d6100, d7000, d7800, and WNR2000v5, among others. Organizations should ensure they are using patched versions to mitigate the risks associated with this vulnerability.
Mitigation & Remediation
Organizations should apply updates per vendor instructions to remediate this vulnerability. If patches are not available, consider implementing network segmentation to limit exposure and monitor for suspicious activity.
For further guidance, organizations can refer to our penetration testing services to assess security postures.
Detection Guidance
Monitor logs for unusual access patterns that could indicate exploitation attempts. Look for anomalies in traffic to the router's management interface, and ensure that alerts are configured for any unauthorized access attempts.
AppSecure Threat Intelligence Insight
The long-term significance of this vulnerability indicates the ongoing risks associated with unpatched devices in the field. The pattern of exploitation highlights a need for organizations to regularly review their device configurations and update practices to prevent similar vulnerabilities from being exploited.
For more insights on securing your environments, consider our penetration testing methodology to enhance your security posture.
Additionally, organizations can benefit from reviewing our vulnerability management program design to ensure robust risk management strategies in place.
Lastly, consider our comprehensive guide on web application penetration testing to further enhance your defenses.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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