CVE-2017-7733 : Security Advisory and Response

A Cross-Site-Scripting (XSS) vulnerability in Fortinet FortiOS versions 5.4.0 to 5.4.5 and 5.6.0 allows remote unauthenticated attackers to execute arbitrary JavaScript code via the webUI 'Login Disclaimer' redir parameter.

Understanding CVE-2017-7733

An XSS vulnerability in Fortinet FortiOS versions 5.4.0 to 5.4.5 and 5.6.0 that enables attackers to execute malicious JavaScript code.

What is CVE-2017-7733?

This CVE refers to a Cross-Site Scripting (XSS) vulnerability in Fortinet FortiOS versions 5.4.0 to 5.4.5 and 5.6.0, allowing unauthorized execution of JavaScript code.

The Impact of CVE-2017-7733

Attackers can exploit the 'Login Disclaimer' redir parameter on the webUI to execute malicious scripts.

Technical Details of CVE-2017-7733

A vulnerability description, affected systems, and exploitation mechanism.

Vulnerability Description

Type: Cross-Site Scripting (XSS)
Attack Vector: Remote
Security Risk: High

Affected Systems and Versions

Product: Fortinet FortiOS
Versions: 5.4.0 to 5.4.5, 5.6.0

Exploitation Mechanism

Attackers can execute arbitrary JavaScript code by manipulating the 'Login Disclaimer' redir parameter.

Mitigation and Prevention

Steps to mitigate and prevent exploitation of CVE-2017-7733.

Immediate Steps to Take

Update Fortinet FortiOS to a patched version.
Implement network security measures to detect and block XSS attacks.

Long-Term Security Practices

Regularly monitor and update security patches.
Educate users on safe browsing practices to prevent XSS attacks.

Patching and Updates

Fortinet has released patches to address this vulnerability.