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CVE-2024-41939 Siemens CVE debrief

CVE-2024-41939 is a high-severity authorization bypass vulnerability in Siemens SINEC NMS, published on 2024-08-13. The affected application fails to properly enforce authorization checks, allowing an authenticated attacker to bypass these controls and elevate privileges within the application. With a CVSS 3.1 score of 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H), this vulnerability presents significant risk due to its network attack vector, low complexity, and high impact on confidentiality, integrity, and availability. The vendor has released a fix in version 3.0 or later. Organizations should prioritize patching, especially given the critical role of network management systems in industrial control environments.

Vendor
Siemens
Product
SINEC NMS
CVSS
HIGH 8.8
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 SINEC NMS for industrial network management, particularly in critical infrastructure sectors. Security teams responsible for ICS/OT asset protection, network administrators managing SINEC NMS deployments, and compliance officers tracking industrial cybersecurity posture should prioritize this patch.

Technical summary

Siemens SINEC NMS contains an authorization bypass vulnerability due to improper enforcement of authorization checks. An authenticated attacker can exploit this weakness to bypass authorization controls and elevate privileges on the application. The vulnerability is rated CVSS 3.1 8.8 (High) with network attack vector, low attack complexity, and requires low privileges. Impact includes high confidentiality, integrity, and availability compromise. Siemens has remediated this in version 3.0 and later.

Defensive priority

high

Recommended defensive actions

  • Apply vendor fix: Update Siemens SINEC NMS to version 3.0 or later
  • Review and validate authorization controls in SINEC NMS deployments
  • Implement network segmentation to limit exposure of SINEC NMS management interfaces
  • Monitor for anomalous privilege escalation attempts in SINEC NMS audit logs
  • Apply defense-in-depth practices for industrial control systems per CISA guidance

Evidence notes

Authorization bypass with privilege escalation; authenticated attack vector; vendor fix available in V3.0+

Official resources

2024-08-13