CVE-2024-5974 Overview
CVE-2024-5974 is a buffer overflow vulnerability in WatchGuard Fireware OS affecting a broad range of Firebox appliances. An authenticated remote attacker with privileged management access can exploit the flaw to execute arbitrary code with system privileges on the firewall. The issue affects Fireware OS versions from 11.9.6 through 12.10.3, spanning physical Firebox M-series and T-series appliances, XTM series, FireboxV, XTMv, and FireboxCloud deployments. The vulnerability is tracked under [CWE-120] (Classic Buffer Overflow) and was published to the National Vulnerability Database (NVD) on July 9, 2024.
Critical Impact
Successful exploitation grants system-level code execution on perimeter firewall devices, giving attackers control over traffic inspection, VPN termination, and network segmentation enforcement.
Affected Products
- WatchGuard Fireware OS versions 11.9.6 through 12.10.3
- WatchGuard Firebox M-series (M200, M270, M290, M300, M370, M390, M400, M440, M470, M500, M570, M590, M670, M690, M4800, M5800) and T-series appliances (T10 through T85 variants)
- WatchGuard FireboxV, XTMv, FireboxCloud, and legacy XTM appliances (XTM850, XTM860, XTM870, XTM1520-RP, XTM1525-RP, XTM2520)
Discovery Timeline
- 2024-07-09 - CVE-2024-5974 published to NVD
- 2026-08-07 - Last updated in NVD database
Technical Details for CVE-2024-5974
Vulnerability Analysis
CVE-2024-5974 is a Classic Buffer Overflow [CWE-120] residing in the management plane of Fireware OS. The vulnerable code path copies attacker-influenced input into a fixed-size buffer without validating the input length. Because the flaw sits in privileged firewall firmware, corruption of adjacent memory can be steered into arbitrary code execution running as the system user.
Exploitation requires that the attacker already hold high-privilege credentials against the management interface. This constraint reduces mass exploitation risk but does not eliminate impact. Privileged management credentials are frequently harvested through phishing, credential reuse, or lateral movement from a compromised administrator workstation. Once code execution is achieved on the firewall, attackers can inspect and modify inbound and outbound traffic, disable logging, and pivot into internal network segments the device was meant to protect.
Root Cause
The root cause is insufficient bounds checking when Fireware OS handles a length-sensitive field submitted through an authenticated management operation. The affected function writes past the end of the destination buffer, corrupting adjacent stack or heap memory structures used by the management process.
Attack Vector
The attack vector is network-based and requires authentication with privileged management access. The attacker sends a crafted management request that overflows the vulnerable buffer, overwrites control data, and redirects execution to attacker-supplied code. WatchGuard has not published detailed exploitation mechanics. Refer to the WatchGuard Security Advisory WGSA-2024-00011 for vendor guidance.
Detection Methods for CVE-2024-5974
Indicators of Compromise
- Unexpected reboots, crashes, or restarts of Fireware management processes on Firebox appliances
- Successful privileged administrator logins from unusual source IPs or outside normal change windows
- Unexplained configuration changes, new admin accounts, or modified logging and VPN policies
- Outbound connections initiated from the Firebox management interface to unknown external hosts
Detection Strategies
- Correlate authentication events on the Firebox management interface with source IP reputation and geolocation to surface anomalous privileged logins.
- Alert on repeated malformed or oversized management API requests, which are consistent with buffer overflow exploitation attempts.
- Baseline normal Firebox management traffic patterns and flag deviations in request size, endpoint use, and session duration.
Monitoring Recommendations
- Forward Fireware syslog and authentication events to a centralized SIEM for long-term retention and correlation with endpoint telemetry.
- Monitor Firebox running configuration integrity by comparing periodic exports against a known-good baseline.
- Track firmware version inventory across all Firebox appliances to identify unpatched devices in scope for CVE-2024-5974.
How to Mitigate CVE-2024-5974
Immediate Actions Required
- Upgrade Fireware OS to a fixed release above 12.10.3 as directed by the WatchGuard PSIRT advisory.
- Restrict management interface access to a dedicated management VLAN or jump host and block administrative access from the internet.
- Rotate all privileged Firebox administrator credentials and enforce multi-factor authentication for management access.
- Audit administrator accounts, API keys, and configuration history for unauthorized changes prior to patching.
Patch Information
WatchGuard has released fixed Fireware OS versions addressing CVE-2024-5974. Consult the WatchGuard Security Advisory WGSA-2024-00011 for the specific patched build for each Firebox model and firmware branch. Apply the upgrade through WatchGuard System Manager or the Web UI following the vendor's documented upgrade path.
Workarounds
- Limit management access to trusted internal IP ranges using Firebox policy until the firmware upgrade can be scheduled.
- Disable remote management over untrusted networks and require VPN plus MFA to reach the management plane.
- Reduce the number of accounts holding privileged management roles to the minimum required for operations.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
