PatchSiren cyber security CVE debrief

CVE-2024-41976 Siemens CVE debrief

CVE-2024-41976 is a high-severity vulnerability affecting 24 Siemens industrial router products, including SCALANCE M-series routers and RUGGEDCOM RM1224 devices. Published on August 13, 2024, this vulnerability stems from improper input validation in specific VPN configuration fields. An authenticated remote attacker can exploit this weakness to execute arbitrary code on affected devices. The CVSS 3.1 score of 7.2 reflects high impact on confidentiality, integrity, and availability, with network attack vector, low attack complexity, and high privileges required. CISA published advisory ICSA-24-228-01 on the same date, coordinating disclosure with Siemens. The vendor has released firmware version 8.1 or later to address this vulnerability. Organizations should prioritize patching, especially given the critical infrastructure contexts where these industrial routers are typically deployed.

Vendor: Siemens
Product: RUGGEDCOM RM1224 LTE(4G) EU (6GK6108-4AM00-2BA2)
CVSS: HIGH 7.2
CISA KEV: Not listed in stored evidence
Original CVE published: 2024-08-13
Original CVE updated: 2024-08-13
Advisory published: 2024-08-13
Advisory updated: 2024-08-13

Who should care

Organizations operating Siemens SCALANCE or RUGGEDCOM industrial routers in manufacturing, energy, transportation, and critical infrastructure sectors. Security teams responsible for OT/ICS network infrastructure and VPN gateway management.

Technical summary

Improper input validation vulnerability in VPN configuration fields of Siemens industrial routers. Authenticated attackers can inject malicious input through VPN configuration interfaces to achieve arbitrary code execution. Affects 24 product variants across SCALANCE M800/M800PB/M800DSL/M800UMTS/M800LTE and RUGGEDCOM RM1224 families. Fixed in firmware version 8.1.

Defensive priority

HIGH

Recommended defensive actions

Apply Siemens firmware update to version 8.1 or later for all affected SCALANCE and RUGGEDCOM router models
Restrict administrative access to VPN configuration interfaces to trusted personnel only
Monitor VPN configuration changes for unauthorized modifications
Implement network segmentation to isolate affected router management interfaces from untrusted networks
Review and apply CISA ICS recommended practices for industrial control system security

Evidence notes

Vulnerability description and affected product list derived from CISA CSAF source. CVSS vector and remediation details confirmed through Siemens SSA-087301 advisory.

Official resources

Coordinated disclosure via CISA ICS advisory ICSA-24-228-01 and Siemens ProductCERT