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CVSS v3 5.9 ATTENTION: Remotely exploitable. Vendor: Siemens Equipment: LOGO! Soft Comfort Vulnerability: Download of Code without Integrity Check AFFECTED PRODUCTS Siemens reports that the vulnerability affects the following LOGO!
Soft Comfort engineering software products:. LOGO!
Soft Comfort: All versions prior to V8.2 IMPACT Successful exploitation of this vulnerability could allow a remote attacker in a privileged network position to manipulate a software package during download. MITIGATION Siemens removed the Update Center from LOGO! Soft Comfort V8.2 and provides SHA-256 checksums for all LOGO! Soft Comfort software packages via a secured HTTPS channel.
Siemens recommends verifying legitimacy by comparing the SHA-256 checksum of the downloaded software package with the SHA-256 checksum provided for the software package. Software version 8.2 for LOGO!
Soft Comfort and SHA-256 checksums for LOGO! Soft Comfort downloads can be obtained via: As a general security measure, Siemens strongly recommends protecting network access to the devices with appropriate mechanisms. Siemens advises configuring the environment according to Siemens operational guidelines in order to run the devices in a protected IT environment. For more information on this vulnerability and more detailed mitigation instructions, please see Siemens Security Advisory SSA-888929 at the following location: NCCIC/ICS-CERT recommends that users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should:. Minimize network exposure for all control system devices and/or systems, and ensure that they are not accessible from the Internet.
Software – simply professional. Soft Comfort – stands for sensationally easy and quick configuration. This allows the creation of user programs. Have been approved or recommended by Siemens. Correct, reliable operation of the product requires proper transport. 3.4 From circuit diagram to LOGO! Have been approved or recommended by Siemens. Correct, reliable operation of the product requires proper transport. 3.4 From circuit diagram to LOGO!
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Locate control system networks and remote devices behind firewalls, and isolate them from the business network. 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. Also recognize that VPN is only as secure as the connected devices. ICS-CERT reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. ICS-CERT also provides a section for on the ICS-CERT web page. Several recommended practices are available for reading and download, including Additional mitigation guidance and recommended practices are publicly available in the ICS‑CERT Technical Information Paper, that is available for download from the.
Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to ICS-CERT for tracking and correlation against other incidents. In addition, ICS-CERT recommends that users take the following measures to protect themselves from social engineering attacks:.
Do not click web links or open unsolicited attachments in email messages. Refer to for more information on avoiding email scams. Refer to for more information on social engineering attacks. No known public exploits specifically target this vulnerability. High skill level is needed to exploit. VULNERABILITY OVERVIEW. The update center of LOGO!
Soft Comfort lacks integrity verification on software packages downloaded via an unprotected communication channel. This could allow a remote attacker to manipulate the software package while performing a man-in-the-middle (MitM) attack. Has been assigned to this vulnerability. A CVSS v3 base score of 5.9 has been calculated; the CVSS vector string is. RESEARCHER Tobias Gebhardt reported this vulnerability to Siemens. BACKGROUND Critical Infrastructure Sectors: Commercial Facilities, Transportation Systems Countries/Areas Deployed: Worldwide Company Headquarters Location: Germany Contact Information For any questions related to this report, please contact the NCCIC at: Email: Toll Free: 1-888-282-0870 For industrial control systems cybersecurity information: or incident reporting: The NCCIC continuously strives to improve its products and services. You can help by choosing one of the links below to provide feedback about this product.