CVE-2024-50569: Fortinet FortiWeb RCE Vulnerability

CVE-2024-50569 Overview

CVE-2024-50569 is an OS command injection vulnerability in Fortinet FortiWeb versions 7.0.0 through 7.6.0. The flaw stems from improper neutralization of special elements passed to an operating system command [CWE-78]. An authenticated attacker with high privileges can submit crafted input to execute unauthorized commands on the underlying system. Successful exploitation impacts confidentiality, integrity, and availability of the FortiWeb appliance. Fortinet published advisory FG-IR-24-438 documenting the issue and remediated versions.

Critical Impact
Authenticated attackers can execute arbitrary OS commands on FortiWeb appliances, compromising the web application firewall protecting production workloads.

Affected Products

Fortinet FortiWeb 7.0.0 through 7.0.x
Fortinet FortiWeb 7.2.0 through 7.2.x
Fortinet FortiWeb 7.4.0 through 7.6.0

Discovery Timeline

2025-02-11 - CVE-2024-50569 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-50569

Vulnerability Analysis

CVE-2024-50569 is classified as OS Command Injection under [CWE-78]. FortiWeb accepts input that is passed to an underlying shell or system command without sufficient sanitization of shell metacharacters. An attacker who supplies crafted input containing separators such as ;, |, &, or backticks can append or substitute commands executed by the appliance.

Exploitation requires network access and authentication with high privileges on the FortiWeb management interface. Once triggered, injected commands run in the context of the FortiWeb service, which typically operates with elevated system rights. This exposes device configuration, TLS material, backend web application traffic policies, and potentially credentials cached on the appliance.

Because FortiWeb operates as a web application firewall inline with protected applications, compromise of the device weakens the security posture of every application it fronts. Attackers can disable inspection rules, exfiltrate inspected traffic, or pivot into internal networks.

Root Cause

The root cause is missing or inadequate input sanitization on parameters that flow into system()-style command execution within FortiWeb. Special shell characters are not neutralized before concatenation into the command string, allowing attacker-controlled substrings to break out of the intended argument context.

Attack Vector

The attack vector is network-based against the FortiWeb management surface. An authenticated administrator or high-privilege operator account is required. No user interaction is needed once the attacker has valid credentials or a hijacked session. See the Fortinet Security Advisory FG-IR-24-438 for vendor-confirmed technical scope.

// No verified public proof-of-concept is available for CVE-2024-50569.
// Refer to Fortinet advisory FG-IR-24-438 for authoritative technical details.

Detection Methods for CVE-2024-50569

Indicators of Compromise

Unexpected child processes spawned by FortiWeb management daemons, particularly shells such as /bin/sh or /bin/bash invoked from HTTPS handling components.
Outbound connections from the FortiWeb appliance to unfamiliar IP addresses following administrative sessions.
Modifications to FortiWeb configuration files, cron entries, or startup scripts not tied to a documented change window.
Authentication events for high-privilege FortiWeb accounts from unusual source IPs or at atypical times.

Detection Strategies

Ingest FortiWeb administrative and audit logs into a centralized SIEM and alert on command execution patterns containing shell metacharacters in API or CLI parameters.
Correlate administrative login events with subsequent egress traffic from the appliance to identify post-authentication abuse.
Baseline expected process trees on FortiWeb and alert on deviations, focusing on unexpected shell invocations.

Monitoring Recommendations

Restrict and monitor access to the FortiWeb management interface using network segmentation and jump host requirements.
Enable verbose audit logging for all administrative API calls and CLI commands on FortiWeb.
Review privileged account usage weekly and rotate credentials for any account with admin or equivalent rights.

How to Mitigate CVE-2024-50569

Immediate Actions Required

Inventory all FortiWeb appliances and identify instances running versions 7.0.0 through 7.6.0.
Upgrade to the fixed FortiWeb release identified in Fortinet advisory FG-IR-24-438.
Rotate credentials for all high-privilege FortiWeb administrative accounts after patching.
Review recent administrative activity logs for evidence of command injection attempts.

Patch Information

Fortinet has published fixed versions in advisory FG-IR-24-438. Consult the advisory for the exact upgrade targets that correspond to your current FortiWeb branch. Apply the vendor-supplied firmware update through the standard FortiWeb upgrade process.

Workarounds

Limit management interface exposure to a dedicated administrative VLAN or bastion host until patching is complete.
Enforce multi-factor authentication on all FortiWeb administrator accounts to reduce risk of credential compromise.
Remove or disable unused high-privilege accounts on the appliance.

bash

# Example: restrict FortiWeb management access to a trusted subnet
config system interface
  edit "port1"
    set allowaccess https ssh
    set trusthost1 10.0.0.0 255.255.255.0
  next
end