As of January 10, 2023, CISA will no longer be updating ICS security advisories for Siemens product vulnerabilities beyond the initial advisory.
For the most up-to-date information on vulnerabilities in this advisory, please see Siemens' ProductCERT Security Advisories.
RISK EVALUATION. Successful exploitation of these vulnerabilities could allow an attacker with administrative privileges to execute arbitrary code on the affected device.
Affected products do not properly validate the content of uploaded X509 certificates which could allow an attacker with administrative privileges to execute arbitrary code on the device.
CVE-2023-44317 has been assigned to this vulnerability.
An improper neutralization of special elements used in an OS command with root privileges vulnerability exists in the parsing of the IPSEC configuration.
CVE-2023-49692 has been assigned to this vulnerability.
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.
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.
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.
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.
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 these vulnerabilities has been reported to CISA at this time.
This Cyber News was published on www.cisa.gov. Publication date: Thu, 14 Dec 2023 18:13:05 +0000