PatchSiren cyber security CVE debrief

CVE-2024-3383 Siemens CVE debrief

A vulnerability in Palo Alto Networks PAN-OS software's processing of data from Cloud Identity Engine (CIE) agents enables unauthorized modification of User-ID groups. This affects Siemens RUGGEDCOM APE1808 devices configured with Palo Alto Networks Virtual NGFW, potentially causing inappropriate access control decisions—users may be incorrectly denied or granted access to network resources based on existing Security Policy rules. The vulnerability was disclosed on April 9, 2024, with the advisory subsequently updated multiple times through May 13, 2025, to incorporate additional upstream vulnerabilities and remediation guidance. A vendor fix is available requiring upgrade to Palo Alto Networks Virtual NGFW V11.1.2-h3.

Vendor: Siemens
Product: RUGGEDCOM APE1808
CVSS: HIGH 7.4
CISA KEV: Not listed in stored evidence
Original CVE published: 2024-04-09
Original CVE updated: 2025-05-13
Advisory published: 2024-04-09
Advisory updated: 2025-05-13

Who should care

Organizations operating Siemens RUGGEDCOM APE1808 devices with Palo Alto Networks Virtual NGFW deployments, particularly in industrial control system (ICS/OT) environments. Security teams responsible for identity-based access control, network segmentation, and User-ID implementations in critical infrastructure sectors.

Technical summary

The vulnerability exists in how PAN-OS software processes data received from Cloud Identity Engine (CIE) agents. Insufficient validation of CIE agent data allows modification of User-ID groups, which directly impacts access control decisions in Security Policy rules. This is particularly critical in OT/ICS environments where Siemens RUGGEDCOM APE1808 devices deploy Palo Alto Networks Virtual NGFW for network segmentation and security. Successful exploitation could result in privilege escalation (inappropriate resource access) or denial of access to legitimate users, with no confidentiality impact but high integrity and availability impact per CVSS:3.1 vector (AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H). Attack complexity is rated HIGH, requiring network access but no privileges or user interaction.

Defensive priority

HIGH

Recommended defensive actions

Upgrade Palo Alto Networks Virtual NGFW to version V11.1.2-h3 on affected Siemens RUGGEDCOM APE1808 devices
Contact Palo Alto Networks customer support to obtain patch and update information
Review Security Policy rules for potential inappropriate access grants or denials caused by modified User-ID groups
Monitor User-ID group mappings for unauthorized changes
Apply defense-in-depth practices for industrial control systems per CISA guidance

Evidence notes

CVE description and remediation details sourced from CISA CSAF advisory ICSA-24-102-04. Vendor attribution to Siemens for RUGGEDCOM APE1808 product confirmed via CSAF product tree. CVSS 7.4 (HIGH) per source. Advisory revision history shows ongoing updates through 2025-05-13.

Official resources

2024-04-09