1. EXECUTIVE SUMMARY
- CVSS v4 8.7
- ATTENTION: Exploitable remotely/low attack complexity
- Vendor: Siemens
- Equipment: SIPROTEC 5 Devices
- Vulnerability: Use of Default Credentials
2. RISK EVALUATION
Successful exploitation of this vulnerability could allow an unauthenticated, remote attacker to retrieve sensitive information of the device.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
Siemens reports that the following products are affected:
- Siemens SIPROTEC 5 7VE85 (CP300): Version V8.80 up to but not including V9.90
- Siemens SIPROTEC 5 7SS85 (CP300): Version V8.80 up to but not including V9.90
- Siemens SIPROTEC 5 Communication Module ETH-BB-2FO (Rev. 2): All versions prior to V9.90
- Siemens SIPROTEC 5 Communication Module ETH-BA-2EL (Rev.2): All versions prior to V9.90
- Siemens SIPROTEC 5 7UT82 (CP150): All versions prior to V9.90
- Siemens SIPROTEC 5 7UT85 (CP300): Version V8.80 up to but not including V9.90
- Siemens SIPROTEC 5 6MD84 (CP300): All versions prior to V9.90
- Siemens SIPROTEC 5 7SJ82 (CP150): All versions prior to V9.90
- Siemens SIPROTEC 5 7SL86 (CP300): Version V8.80 up to but not including V9.90
- Siemens SIPROTEC 5 7KE85 (CP300): Versions later than and including V8.80
- Siemens SIPROTEC 5 7SJ86 (CP300): Version V8.80 up to but not including V9.90
- Siemens SIPROTEC 5 6MD86 (CP300): Version V8.80 up to but not including V9.90
- Siemens SIPROTEC 5 7SX82 (CP150): All versions prior to V9.90
- Siemens SIPROTEC 5 7SL87 (CP300): Version V8.80 up to but not including V9.90
- Siemens SIPROTEC 5 7SA82 (CP150): All versions prior to V9.90
- Siemens SIPROTEC 5 7SL82 (CP150): All versions prior to V9.90
- Siemens SIPROTEC 5 7SJ85 (CP300): Version V8.80 up to but not including V9.90
- Siemens SIPROTEC 5 7ST85 (CP300): Versions later than and including V8.80
- Siemens SIPROTEC 5 7ST86 (CP300): All versions
- Siemens SIPROTEC 5 7SD82 (CP150): All versions prior to V9.90
- Siemens SIPROTEC 5 7SK85 (CP300): Version V8.80 up to but not including V9.90
- Siemens SIPROTEC 5 Compact 7SX800 (CP050): Version V9.50 up to but not including V9.90
- Siemens SIPROTEC 5 6MD85 (CP300): Version V8.80 up to but not including V9.90
- Siemens SIPROTEC 5 6MU85 (CP300): Version V8.80 up to but not including V9.90
- Siemens SIPROTEC 5 7SK82 (CP150): All versions prior to V9.90
- Siemens SIPROTEC 5 7SA87 (CP300): Version V8.80 up to but not including V9.90
- Siemens SIPROTEC 5 7VK87 (CP300): Version V8.80 up to but not including V9.90
- Siemens SIPROTEC 5 7VU85 (CP300): All versions prior to V9.90
- Siemens SIPROTEC 5 7SA86 (CP300): Version V8.80 up to but not including V9.90
- Siemens SIPROTEC 5 7SD87 (CP300): Version V8.80 up to but not including V9.90
- Siemens SIPROTEC 5 Communication Module ETH-BD-2FO: Version V8.80 up to but not including V9.90
- Siemens SIPROTEC 5 6MD89 (CP300): Version V8.80 up to but not including V9.90
- Siemens SIPROTEC 5 7UM85 (CP300): Version V8.80 up to but not including V9.90
- Siemens SIPROTEC 5 7SJ81 (CP150): All versions prior to V9.90
- Siemens SIPROTEC 5 7UT86 (CP300): Version V8.80 up to but not including V9.90
- Siemens SIPROTEC 5 7SX85 (CP300): Version V8.80 up to but not including V9.90
- Siemens SIPROTEC 5 7UT87 (CP300): Version V8.80 up to but not including V9.90
- Siemens SIPROTEC 5 7SY82 (CP150): All versions prior to V9.90
- Siemens SIPROTEC 5 7SD86 (CP300): Version V8.80 up to but not including V9.90
3.2 VULNERABILITY OVERVIEW
3.2.1 USE OF DEFAULT CREDENTIALS CWE-1392
Affected devices do not properly validate SNMP GET requests. This could allow an unauthenticated, remote attacker to retrieve sensitive information of the affected devices with SNMPv2 GET requests using default credentials.
CVE-2024-54015 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been calculated; the CVSS vector string is (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).
A CVSS v4 score has also been calculated for CVE-2024-54015. A base score of 8.7 has been calculated; the CVSS vector string is (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N).
3.3 BACKGROUND
- CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
- COUNTRIES/AREAS DEPLOYED: Worldwide
- COMPANY HEADQUARTERS LOCATION: Germany
3.4 RESEARCHER
Siemens reported this vulnerability to CISA.
4. MITIGATIONS
Siemens has identified the following specific workarounds and mitigations users can apply to reduce risk:
- All affected products: Restrict access to port 161/udp to trusted IP addresses only.
- All affected products: Disable the SNMP service running in the communication modules, if not used.
- SIPROTEC 5 7KE85 (CP300), SIPROTEC 5 7ST85 (CP300), SIPROTEC 5 7ST86 (CP300): Currently no fix is available.
- SIPROTEC 5 Compact 7SX800 (CP050): Update to V9.90 or later version.
- SIPROTEC 5 7SA82 (CP150), SIPROTEC 5 7SD82 (CP150), SIPROTEC 5 7SJ81 (CP150), SIPROTEC 5 7SJ82 (CP150), SIPROTEC 5 7SK82 (CP150), SIPROTEC 5 7SL82 (CP150), SIPROTEC 5 7SX82 (CP150), SIPROTEC 5 7SY82 (CP150), SIPROTEC 5 7UT82 (CP150): Update to V9.90 or later version.
- SIPROTEC 5 6MD84 (CP300), SIPROTEC 5 6MD85 (CP300), SIPROTEC 5 6MD86 (CP300), SIPROTEC 5 6MD89 (CP300), SIPROTEC 5 6MU85 (CP300), SIPROTEC 5 7SA86 (CP300), SIPROTEC 5 7SA87 (CP300), SIPROTEC 5 7SD86 (CP300), SIPROTEC 5 7SD87 (CP300), SIPROTEC 5 7SJ85 (CP300), SIPROTEC 5 7SJ86 (CP300), SIPROTEC 5 7SK85 (CP300), SIPROTEC 5 7SL86 (CP300), SIPROTEC 5 7SL87 (CP300), SIPROTEC 5 7SS85 (CP300), SIPROTEC 5 7SX85 (CP300), SIPROTEC 5 7UM85 (CP300), SIPROTEC 5 7UT85 (CP300), SIPROTEC 5 7UT86 (CP300), SIPROTEC 5 7UT87 (CP300), SIPROTEC 5 7VE85 (CP300), SIPROTEC 5 7VK87 (CP300), SIPROTEC 5 7VU85 (CP300): Update to V9.90 or later version.
- SIPROTEC 5 Communication Module ETH-BA-2EL (Rev.2), SIPROTEC 5 Communication Module ETH-BB-2FO (Rev. 2), SIPROTEC 5 Communication Module ETH-BD-2FO: Update to V9.90 or later version.
As a general security measure, Siemens recommends protecting network access to devices with appropriate mechanisms. To operate the devices in a protected IT environment, Siemens recommends configuring the environment according to Siemens’ operational guidelines for industrial security and following recommendations in the product manuals.
Additional information on industrial security by Siemens can be found on the Siemens industrial security webpage
For more information see the associated Siemens security advisory SSA-767615 in HTML and CSAF.
CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability, such as:
- Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the internet.
- Locate control system networks and remote devices behind firewalls and isolating them from business networks.
- When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs). Recognize VPNs may have vulnerabilities, should be updated to the most recent version available, and are only as secure as the connected devices.
CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.
CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.
Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov in the technical information paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies.
Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.
No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time.
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