CVE-2019-9161 Explained : Impact and Mitigation

Sangfor Sundray WLAN Controller version 3.7.4.2 and earlier is vulnerable to remote code execution, allowing attackers to gain full system access by exploiting shell metacharacters in the nginx_webconsole.php Cookie header.

Understanding CVE-2019-9161

This CVE involves a critical vulnerability in the Sangfor Sundray WLAN Controller that can lead to a complete system compromise.

What is CVE-2019-9161?

The vulnerability in the Sangfor Sundray WLAN Controller version 3.7.4.2 and earlier allows remote attackers to execute arbitrary code and obtain full system access by manipulating shell metacharacters in the nginx_webconsole.php Cookie header.

The Impact of CVE-2019-9161

Exploiting this vulnerability can result in unauthorized access to sensitive system files, including the admin password stored in the etc/config/wac/wns_cfg_admin_detail.xml file. Attackers can potentially gain control over the entire system, compromising its integrity and confidentiality.

Technical Details of CVE-2019-9161

Sangfor Sundray WLAN Controller vulnerability specifics.

Vulnerability Description

The vulnerability arises from the presence of shell metacharacters in the nginx_webconsole.php Cookie header, enabling attackers to read the admin password from the wns_cfg_admin_detail.xml file.

Affected Systems and Versions

Sangfor Sundray WLAN Controller version 3.7.4.2 and earlier

Exploitation Mechanism

Attackers exploit shell metacharacters in the Cookie header to access sensitive system files and retrieve the admin password.

Mitigation and Prevention

Protecting systems from CVE-2019-9161.

Immediate Steps to Take

Update the Sangfor Sundray WLAN Controller to a patched version that addresses the vulnerability.
Monitor network traffic for any suspicious activities that may indicate exploitation attempts.

Long-Term Security Practices

Implement strong password policies and regularly update passwords to prevent unauthorized access.
Conduct regular security audits and penetration testing to identify and address potential vulnerabilities.

Patching and Updates

Apply security patches and updates provided by Sangfor to mitigate the CVE-2019-9161 vulnerability.