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CVE-2024-12987: Medium Vulnerability in DrayTek Vigor Routers

A medium-severity OS command injection vulnerability has been discovered in DrayTek Vigor2960 and Vigor300B routers. Organizations should prioritize patching to mitigate remote exploitation risks.

MEDIUMKnown ExploitedCVSS 6.9 · Published December 27, 2024

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A vulnerability, which was classified as critical, was found in DrayTek Vigor2960 and Vigor300B 1.5.1.4. Affected is an unknown function of the file /cgi-bin/mainfunction.cgi/apmcfgupload of the component Web Management Interface. The manipulation of the argument session leads to OS command injection. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 1.5.1.5 is able to address this issue. It is recommended to upgrade the affected component.

This vulnerability allows for potential unauthorized access to the system, which could lead to further attacks or data breaches. The CVSS score of 6.9 indicates a medium severity, emphasizing the need for organizations to act promptly.

Risk to organizations includes the possibility of attackers gaining control over the affected routers, potentially compromising sensitive network traffic. Organizations should prioritize patching immediately to mitigate these risks.

As DrayTek has confirmed the exploit exists, organizations using the affected products must take immediate action to secure their environments against this vulnerability.

Vulnerability Details

Official CVE description states that the vulnerability affects the DrayTek Vigor2960 and Vigor300B firmware version 1.5.1.4. The exploitation of this vulnerability allows attackers to execute arbitrary OS commands through the web management interface.

The CVSS score of 6.9 classifies this vulnerability as medium severity, highlighting the necessity for timely remediation. This vulnerability can be exploited remotely, and the attack complexity is low, meaning that minimal technical skill is required to exploit it.

DrayTek has published an updated firmware version 1.5.1.5 to address this issue, and it is crucial for organizations to upgrade to this version to mitigate the risks.

Technical Analysis

The root cause of this vulnerability is related to improper validation of user inputs in the web management interface. This allows an attacker to manipulate the session argument and execute arbitrary commands on the server.

The attack vector is network-based, which means that an attacker can exploit this vulnerability from a remote location without needing access to the internal network. The attack complexity is low, with no privileges required, and no user interaction needed for exploitation.

The potential impacts of this vulnerability include low confidentiality, integrity, and availability impact, indicating that while the risk exists, it may not lead to severe consequences unless exploited in conjunction with other vulnerabilities.

Risk & Impact Analysis

The real-world risk associated with CVE-2024-12987 primarily revolves around its exploitation potential. Attackers may leverage this vulnerability to gain unauthorized access to devices, thus potentially pivoting to more sensitive parts of the network.

Organizations should assess their exposure to this vulnerability and prioritize patching based on the criticality of the devices affected. Given the attack vector and low complexity required for exploitation, swift action is necessary.

With the CVSS score reflecting medium severity, organizations should address this in their priority patch cycle to limit any potential exploitability.

Exploitation Status

Signal

Status

Known Exploit

No

Public PoC

No

Actively Exploited

Yes

Ransomware Use

No

Affected Versions

The affected versions include DrayTek Vigor2960 firmware version 1.5.1.4 and DrayTek Vigor300B firmware version 1.5.1.4. It is important to upgrade to version 1.5.1.5 or later to mitigate the risks.

Mitigation & Remediation

Organizations should upgrade to the latest firmware version, which is 1.5.1.5, to remediate this vulnerability. Configuration hardening and monitoring are also recommended to detect any suspicious activities.

For further assistance, organizations can consider engaging in penetration testing services to validate their security posture.

Detection Guidance

Organizations should monitor logs for unusual activity, particularly around the web management interface. Behavioral anomalies and unauthorized access attempts should be flagged and investigated.

AppSecure Threat Intelligence Insight

The long-term significance of CVE-2024-12987 lies in its demonstration of how vulnerable web management interfaces can be exploited if not properly secured. This pattern of vulnerability emphasizes the need for continuous security assessments.

Security teams should take this incident as a lesson in the importance of timely patches and the implementation of secure coding practices. Regular updates and security training can significantly reduce the attack surface.

Organizations are encouraged to follow best practices outlined in the penetration testing methodology to ensure robust security measures are in place.

Furthermore, organizations should consider adopting a comprehensive vulnerability management program to proactively identify and mitigate risks.

Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.

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