PatchSiren

PatchSiren cyber security CVE debrief

CVE-2024-27947 Siemens CVE debrief

A medium-severity vulnerability in Siemens RUGGEDCOM CROSSBOW could allow an attacker to forward log messages to a specific compromised client under certain circumstances. The issue, published on May 14, 2024, stems from improper handling of log message forwarding that could be exploited to redirect sensitive log data to an attacker-controlled endpoint. Siemens has released version 5.5 or later to address this vulnerability. Organizations should prioritize updating affected systems and review network segmentation controls to limit exposure of industrial control system management interfaces.

Vendor
Siemens
Product
RUGGEDCOM CROSSBOW
CVSS
MEDIUM 5.3
CISA KEV
Not listed in stored evidence
Original CVE published
2024-05-14
Original CVE updated
2024-05-14
Advisory published
2024-05-14
Advisory updated
2024-05-14

Who should care

Organizations operating Siemens RUGGEDCOM CROSSBOW centralized management systems in industrial control environments, particularly those in critical infrastructure sectors where log integrity and confidentiality are essential for security monitoring and incident response.

Technical summary

CVE-2024-27947 affects Siemens RUGGEDCOM CROSSBOW, a centralized management system for industrial network devices. The vulnerability allows log messages to be forwarded to a specific client under certain conditions, potentially enabling an attacker to exfiltrate log data to a compromised client. The CVSS 3.1 score of 5.3 reflects network accessibility, low attack complexity, and low confidentiality impact. No authentication or user interaction is required for exploitation. Siemens has addressed this issue in version 5.5 and later. The vulnerability does not appear in CISA's Known Exploited Vulnerabilities catalog, and no public exploitation has been reported at time of advisory publication.

Defensive priority

medium

Recommended defensive actions

  • Update Siemens RUGGEDCOM CROSSBOW to version 5.5 or later as specified in vendor remediation guidance
  • Review network segmentation to ensure management interfaces are not exposed to untrusted networks
  • Monitor for anomalous log forwarding configurations or unexpected outbound connections from CROSSBOW systems
  • Apply CISA ICS recommended practices for defense-in-depth strategies in industrial control environments

Evidence notes

Vulnerability description and remediation guidance sourced from CISA ICS Advisory ICSA-24-137-10, which references Siemens Security Advisory SSA-916916. CVSS 3.1 vector indicates network attack vector with low attack complexity, no privileges required, and low confidentiality impact.

Official resources

2024-05-14