CVE-2023-23313 : Security Advisory and Response

This CVE involves certain Draytek products being vulnerable to Cross-Site Scripting (XSS) through specific scripts in the router's web application management portal. The impacted products include Vigor3910, Vigor1000B, Vigor2962, Vigor2865, Vigor2866, Vigor2927, Vigor2915, Vigor2765, Vigor2766, Vigor2135, Vigor2763, Vigor2862, Vigor2926, Vigor2925, Vigor2952, Vigor3220, Vigor2133, Vigor2762, and Vigor2832.

Understanding CVE-2023-23313

This section delves into what CVE-2023-23313 entails, the impact it has, the technical details, and how to mitigate and prevent exploitation of the vulnerability.

What is CVE-2023-23313?

CVE-2023-23313 refers to a Cross-Site Scripting vulnerability found in certain Draytek products, which could be exploited through specific scripts in the router's web application management portal.

The Impact of CVE-2023-23313

The vulnerability could allow malicious actors to inject and execute malicious scripts on the affected Draytek products, potentially leading to unauthorized access, data theft, and other security breaches.

Technical Details of CVE-2023-23313

This section provides a deeper look into the vulnerability, the affected systems and versions, and how attackers could exploit it.

Vulnerability Description

The vulnerability allows for Cross-Site Scripting (XSS) attacks via the wlogin.cgi script and user_login.cgi script in the router's web application management portal of the impacted Draytek products.

Affected Systems and Versions

The following Draytek products are affected by CVE-2023-23313: Vigor3910, Vigor1000B, Vigor2962 v4.3.2.1; Vigor2865, Vigor2866 v4.4.1.0; Vigor2927 v4.4.2.2; Vigor2915, Vigor2765, Vigor2766, Vigor2135 v4.4.2.0; Vigor2763 v4.4.2.1; Vigor2862, Vigor2926 v3.9.9.0; Vigor2925 v3.9.3; Vigor2952, Vigor3220 v3.9.7.3; Vigor2133, Vigor2762 v3.9.6.4; and Vigor2832 v3.9.6.2.

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting and injecting malicious scripts into the affected scripts within the router's web application, potentially leading to unauthorized code execution and compromise of the target system.

Mitigation and Prevention

To safeguard against the CVE-2023-23313 vulnerability, it is crucial to take immediate actions and implement long-term security practices to mitigate the risk of exploitation.

Immediate Steps to Take

Update the firmware of the affected Draytek products to the latest patched versions.
Regularly monitor and restrict access to the web application management portal of the routers.
Implement network-level security measures to detect and prevent XSS attacks.

Long-Term Security Practices

Conduct regular security assessments and penetration testing to identify and address vulnerabilities proactively.
Educate users and administrators about safe web browsing practices and potential security risks.
Keep abreast of security advisories and updates from Draytek to stay informed about emerging threats and vulnerabilities.

Patching and Updates

Draytek has released patches and updates to address the Cross-Site Scripting vulnerability in the impacted products. It is essential to apply these patches promptly to secure the systems and prevent exploitation of the CVE-2023-23313 vulnerability.