CVE-2024-2550 Palo Alto Networks CVE debrief

Who should care

Organizations operating Siemens RUGGEDCOM APE1808 devices with Palo Alto Networks Virtual NGFW, particularly in industrial control system (ICS) and operational technology (OT) environments. Security teams responsible for VPN gateway infrastructure, firewall administrators, and OT security practitioners should prioritize this vulnerability due to the unauthenticated attack vector and potential for repeated exploitation to force maintenance mode. Organizations with remote access dependencies on GlobalProtect for critical infrastructure operations face elevated risk from service disruption.

Technical summary

The vulnerability exists in the GlobalProtect gateway component of Palo Alto Networks PAN-OS software. A null pointer dereference can be triggered by an unauthenticated attacker sending a specially crafted packet to the GlobalProtect gateway. Successful exploitation causes the GlobalProtect service to stop, resulting in denial of service. Repeated exploitation attempts can escalate the impact, causing the firewall to enter maintenance mode. The CVSS 3.1 vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H indicates network attack vector, low attack complexity, no privileges required, no user interaction, and high availability impact. This vulnerability is particularly significant in operational technology (OT) environments where Siemens RUGGEDCOM APE1808 devices deploy Palo Alto Networks Virtual NGFW for industrial network protection.

Defensive priority

HIGH

Recommended defensive actions

• Upgrade Palo Alto Networks Virtual NGFW to version 11.1.8 per vendor guidance; contact Palo Alto Networks customer support to obtain patch and update information
• Monitor GlobalProtect service availability and firewall operational state for unexpected maintenance mode transitions
• Apply network segmentation to restrict GlobalProtect gateway exposure to authorized sources only
• Review and implement CISA ICS recommended practices for defense-in-depth strategies
• Validate that DNS Security logging configurations do not introduce additional attack surface from related vulnerabilities (CVE-2024-3393) documented in subsequent advisory revisions

Evidence notes

CVE description and remediation details sourced from CISA CSAF advisory ICSA-24-338-02. CVSS 3.1 score of 7.5 (HIGH) confirmed. Vendor fix specified as upgrade to Palo Alto Networks Virtual NGFW V11.1.8 with contact to customer support for patch information.

Official resources