Sangfor Next Gen Application Firewall Local File Inclusion Scanner

Sangfor Next Gen Application Firewall is a security solution used by enterprises to protect their networks from various cyber threats. Typically deployed at network boundaries, it helps in analyzing traffic and mitigating attacks. Businesses and organizations implement this software to ensure data integrity and confidentiality. The firewall also aids in the monitoring of incoming and outgoing network traffic. It has advanced capabilities to filter web content and applications. Sangfor's software is known for its robust performance in protecting against novel cybersecurity vulnerabilities.

Local File Inclusion (LFI) is a vulnerability that allows an attacker to include files on a server through the web browser. This can potentially lead to the exposure of sensitive data, unauthorized access, and even full system compromise in extreme cases. The vulnerability arises when input data is not properly sanitized, allowing an attacker to manipulate the file paths. Attackers can exploit this vulnerability by tricking the application into executing or displaying malicious files. LFI can be used in conjunction with other vulnerabilities to escalate attacks further. Detecting such vulnerabilities is crucial to safeguarding sensitive information and maintaining system integrity.

In this particular case of Local File Inclusion (LFI), the vulnerability is found in the 'loadfile.php' endpoint of the Sangfor Next Gen Application Firewall. The parameter 'file' is vulnerable and does not undergo proper validation, allowing attackers to include files like '/etc/passwd' from the server's directory structure. By crafting a request that accesses unauthorized files, attackers gain insights into sensitive information stored on the server. The lack of proper input validation and sanitization in the file inclusion process exacerbates this vulnerability. Consequently, exploits can be executed by manipulating file path inputs via the URL. Mitigating such vulnerabilities necessitates rigorous security measures and code auditing.

If exploited, the Local File Inclusion vulnerability could allow an attacker to read arbitrary files on the server. This might result in data leaks, unveiling sensitive information like user credentials or system configurations. In severe scenarios, it can lead to further exploitation, such as remote code execution, if combined with other vulnerabilities or misconfigurations. The breach of confidentiality and potential unauthorized access to systems can severely disrupt business operations. Hence, the fallout of such exploitation might include reputational damage, financial loss, and regulatory fines. It is imperative to address these vulnerabilities to safeguard organizational assets effectively.

REFERENCES

• https://labs.watchtowr.com/yet-more-unauth-remote-command-execution-vulns-in-firewalls-sangfor-edition/