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You can help by choosing one of the links below to provide feedback about this product. BACKGROUNDĬritical Infrastructure Sectors: Communications, Critical Manufacturing, Information Technologyįor any questions related to this report, please contact the CISA at:įor industrial control systems cybersecurity information: ĬISA continuously strives to improve its products and services.

coordinated this vulnerability with NCCIC. PHOENIX CONTACT reported to that their products are affected. A CVSS v3 base score of 7.8 has been assigned the CVSS vector string is ( AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).

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Verification may not always be performed correctly, allowing an attacker to modify firmware update packages.ĬVE-2018-5441 has been assigned to this vulnerability. MGuard devices rely on internal checksums for verification of the internal integrity of the update packages. IMPROPER VALIDATION OF INTEGRITY CHECK VALUE CWE-354 This vulnerability is not remotely exploitable. FL mGuard routers from Phoenix Contact protect your industrial network with a powerful, flexible and fast firewall. No known public exploits specifically target this vulnerability. Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to NCCIC for tracking and correlation against other incidents.

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Several recommended practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.Īdditional mitigation guidance and recommended practices are publicly available in the NCCIC Technical Information Paper, ICS-TIP-12-146-01B-Targeted Cyber Intrusion Detection and Mitigation Strategies, that is available for download from the ICS-CERT web site. NCCIC also provides a section for control systems security recommended practices on the ICS-CERT web page. NCCIC reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. Also recognize that VPN is only as secure as the connected devices.

When remote access is required, use secure methods, such as Virtual Private Networks (VPNs), recognizing that VPNs may have vulnerabilities and should be updated to the most current version available.

Locate control system networks and remote devices behind firewalls, and isolate them from the business network.

Minimize network exposure for all control system devices and/or systems, and ensure that they are not accessible from the Internet.

NCCIC recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities.

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PHOENIX CONTACT recommends that affected users upgrade to firmware version 8.6.1 Successful exploitation of this vulnerability could allow for an attacker to modify firmware update packages. The following versions of mGuard, a network device, are affected: Vulnerability: Improper Validation of Integrity Check Value AFFECTED PRODUCTS