Full Report
Several Industrial Communication Devices based on SINEC OS before V3.1 contain an incorrect authorization check vulnerability that could allow an attacker to perform actions that exceed the permissions of the “guest” role. Siemens has released new versions for the affected products and recommends to update to the latest versions.
Analysis Summary
# Vulnerability: Incorrect Authorization Check in Siemens SINEC OS Industrial Devices
## CVE Details
- **CVE ID:** CVE-2024-41797
- **CVSS Score:** 4.3 (Medium) / CVSS v4.0: 5.3 (Medium)
- **CWE:** CWE-269: Improper Privilege Management
## Affected Systems
- **Products:** Industrial Communication Devices including:
- RUGGEDCOM RST2428P (6GK6242-6PA00)
- SCALANCE XC-300 family (XC316-8, XC324-4, XC324-4 EEC, XC332)
- SCALANCE XC-400 family (XC416-8, XC424-4, XC432)
- SCALANCE XCM-/XRM-/XCH-/XRH-300 family (XCH328, XCM324)
- **Versions:** All versions prior to V3.1.
- **Configurations:** Systems where the "guest" role is enabled and accessible.
## Vulnerability Description
Affected devices contain a flaw where authorization checks are incorrectly performed. An authenticated remote attacker assigned the **"guest"** role can invoke an internal "do system" command. This command allows the guest user to bypass intended role restrictions and execute actions normally reserved for higher-privileged accounts. Technical analysis indicates the most critical action available via this flaw is the ability to clear the local system log.
## Exploitation
- **Status:** Not exploited (No known active exploitation or public PoC reported at time of advisory).
- **Complexity:** Low
- **Attack Vector:** Network (Remote)
## Impact
- **Confidentiality:** None
- **Integrity:** Low (Ability to clear system logs and perform low-risk actions).
- **Availability:** None
## Remediation
### Patches
Siemens recommends updating all affected products to **V3.1 or later**.
- Firmware available via Siemens Industry Online Support:
- hxxps://support[.]industry[.]siemens[.]com/cs/ww/en/view/109977557/
### Workarounds
The advisory does not list specific feature-based workarounds. General mitigations include:
- Protecting network access to devices with firewalling and VPCs.
- Following Siemens' operational guidelines for Industrial Security.
## Detection
- **Indicators of Compromise:** Unexpected clearing of local system logs or log entries showing "guest" users interacting with system-level commands.
- **Detection methods and tools:** Audit administrative logs and monitor for unauthorized role-based activities.
## References
- **Siemens Security Advisory SSA-633269:**
- hxxps://cert-portal[.]siemens[.]com/productcert/html/ssa-633269[.]html
- **Siemens Operational Guidelines:**
- hxxps://www[.]siemens[.]com/cert/operational-guidelines-industrial-security