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Introduction:
A critical vulnerability designated CVE-2025-58443 has been discovered in FOG Project, a widely used open-source cloning and imaging suite. This flaw allows an unauthenticated attacker to bypass authentication entirely, leading to a full database dump and server-side request forgery (SSRF), ultimately paving the way for remote code execution. This article provides a technical deep dive and actionable guidance for both offensive and defensive security professionals.
Learning Objectives:
- Understand the mechanics of the FOG Project authentication bypass and SSRF vulnerability.
- Learn how to exploit the vulnerability to extract credentials and achieve remote code execution.
- Implement immediate mitigation and hardening strategies for FOG Project deployments.
You Should Know:
1. Crafting the Unauthenticated Database Dump Request
The core of the authentication bypass lies in a misconfigured API endpoint that improperly handles session validation. A specially crafted HTTP request can trigger a full database export without any credentials.
`curl -X POST -H “Content-Type: application/json” -d ‘{“export”:true,”type”:”sql”}’ http://
Step-by-step guide:
This `curl` command sends a POST request to the vulnerable `export.php` endpoint. The server fails to verify if the requesting user is authenticated, processing the `export` command regardless. The response will contain the entire FOG database in SQL format, which includes hashed administrator passwords, imaging task details, and stored device credentials.
2. Leveraging the SSRF for Internal Reconnaissance
The same vulnerable endpoint is susceptible to Server-Side Request Forgery (SSRF), allowing an attacker to force the application to make requests to internal services.
`curl -X POST -H “Content-Type: application/json” -d ‘{“url”:”http://169.254.169.254/latest/meta-data/”}’ http://
Step-by-step guide:
This command probes the instance metadata service, often found in cloud environments like AWS. By changing the `url` parameter in the JSON payload, an attacker can scan the internal network (e.g., `http://192.168.1.1:8080/`), interact with unexposed admin panels, or retrieve cloud credentials.
3. Extracting and Cracking Password Hashes
The database dump will contain password hashes for the FOG web interface and potentially other services. These can be extracted and cracked offline.
`grep -oE ‘[a-f0-9]{32}’ database_dump.sql | sort -u > target_hashes.txt<h2 style="color: yellow;">hashcat -m 0 -a 0 target_hashes.txt /usr/share/wordlists/rockyou.txt`
Step-by-step guide:
The `grep` command extracts what appear to be MD5 hashes from the SQL dump. `Hashcat` is then used in mode `-m 0` (MD5) with a wordlist to perform a dictionary attack. Gaining a cleartext password is critical for the next step.
4. Gaining Authenticated Access to the FOG Console
Use the cracked credentials to log into the FOG web administration portal, which provides control over all managed devices.
`firefox http://
Step-by-step guide:
Navigate to the FOG management URL and enter the compromised administrator credentials. Once authenticated, you have full control over the imaging environment, including the ability to deploy modified images to connected clients.
- Abusing FOG’s SSH Keys for Remote Code Execution
FOG stores an SSH private key on the server to access client systems for imaging tasks. The database dump reveals the location and password for this key.
`grep “sshKey” database_dump.sql`
` Locate the private key file on the server (e.g., /opt/fog/.ssh/id_rsa)`
`chmod 600 fog_key.priv`
`ssh -i fog_key.priv foguser@`
Step-by-step guide:
The database contains a reference to the SSH key’s passphrase. Find the key file on the server filesystem. Use the passphrase to decrypt the key and then SSH into any client device managed by the FOG server, achieving full Remote Code Execution.
6. Mitigation: Patching and Access Control
The immediate mitigation is to apply the official patch from the FOG Project. If a patch is not immediately available, implement network access controls.
`sudo ufw deny from any to any port 80,443`
`sudo ufw allow from 192.168.50.0/24 to any port 80,443`
`sudo systemctl enable ufw`
`sudo systemctl start ufw`
Step-by-step guide:
These Uncomplicated Firewall (UFW) commands first deny all HTTP/S traffic and then only allow it from a specific, trusted management subnet (192.168.50.0/24). This restricts attack surface to internal, trusted hosts only.
7. Mitigation: Web Server Hardening
Harden the web server by placing the FOG administration directory behind additional authentication and disabling problematic PHP functions.
` Example Apache .htaccess for /fog/management/`
`AuthType Basic`
`AuthName “Restricted Access”`
`AuthUserFile /etc/apache2/.htpasswd`
`Require valid-user`
` In php.ini`
`disable_functions = curl_exec, curl_multi_exec, shell_exec, exec, system, passthru`
Step-by-step guide:
The `.htaccess` file adds a layer of HTTP Basic authentication before reaching the FOG login page. Modifying `php.ini` to disable dangerous functions can neuter the SSRF component by preventing the PHP `curl`exec functions from operating.
What Undercode Say:
- This vulnerability chain demonstrates the criticality of “dependency security”—many organizations use FOG without considering its external attack surface.
- The pivot from a simple HTTP request to full domain compromise via stored SSH keys is a classic example of penetration testing “chaining” and should be a core lesson for red teams.
The exploit’s simplicity is its most dangerous feature. It requires no advanced tooling, just a basic understanding of HTTP and API interactions, making it accessible to a wide range of threat actors. Defenders must treat internal network management tools with the same security rigor as external-facing applications, as they often hold the keys to the kingdom. The rapid weaponization of this CVE is inevitable and will likely be incorporated into automated attack frameworks targeting misconfigured IT infrastructure.
Prediction:
The public release of this Proof-of-Concept exploit will lead to a rapid increase in scanning activity for exposed FOG Project instances within weeks. We predict this vulnerability will become a primary initial access vector for ransomware groups targeting educational institutions and large enterprises that rely on FOG for endpoint management. The ability to image machines provides a perfect mechanism for deploying ransomware payloads simultaneously across an entire network, potentially leading to widespread, crippling outages. This will force a industry-wide re-evaluation of the security posture of operational technology (OT) and IT management tools.
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IT/Security Reporter URL:
Reported By: Casp3r0x0 Exploit – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
