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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2022.6114.2 Advisory (icsa-22-326-01) AVEVA Edge 23 November 2022 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: AVEVA Edge Publisher: ICS-CERT Operating System: Network Appliance Resolution: Patch/Upgrade CVE Names: CVE-2021-42797 CVE-2021-42796 CVE-2021-42794 CVE-2016-2542 Original Bulletin: https://us-cert.cisa.gov/ics/advisories/icsa-22-326-01 Revision History: November 23 2022: Fixed formatting in the bulletin November 23 2022: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- ICS Advisory (ICSA-22-326-01) AVEVA Edge Original release date: November 22, 2022 Legal Notice All information products included in https://us-cert.cisa.gov/ics are provided "as is" for informational purposes only. The Department of Homeland Security (DHS) does not provide any warranties of any kind regarding any information contained within. DHS does not endorse any commercial product or service, referenced in this product or otherwise. Further dissemination of this product is governed by the Traffic Light Protocol (TLP) marking in the header. For more information about TLP, see https://us-cert.cisa.gov/tlp/ . 1. EXECUTIVE SUMMARY o CVSS v3 9.8 o ATTENTION: Exploitable remotely/low attack complexity o Vendor: AVEVA o Equipment: Edge o Vulnerabilities: Uncontrolled Search Path Element, Exposure of Sensitive Information to an Unauthorized Actor, Uncontrolled Resource Consumption, Improper Access Control, Windows UNC Share 2. RISK EVALUATION Successful exploitation of these vulnerabilities could allow an attacker to insert malicious DLL files and trick the application into executing code. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following versions of AVEVA Edge, an HMI/SCADA software, are affected: o AVEVA Edge 2020 R2 SP1 o AVEVA Edge 2020 R2 SP1 w/ HF 2020.2.00.40 o AVEVA Edge 2020 R2 and all prior versions (formerly known as InduSoft Web Studio) 3.2 VULNERABILITY OVERVIEW 3.2.1 UNCONTROLLED SEARCH PATH ELEMENT CWE-427 In AVEVA Edge versions R2020 and prior could allow a malicious entity with access to the file system to achieve arbitrary code execution and privilege escalation by tricking the AVEVA Edge InstallShield package to load an unsafe DLL. This attack is only possible during the installation or when performing an install or repair operation. CVE-2016-2542 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is ( AV:L/AC:L/PR:L/UI:N/S:U/ C:H/I:H/A:H ). 3.2.2 EXPOSURE OF SENSITIVE INFORMATION TO AN UNAUTHORIZED ACTOR CWE-200 AVEVA Edge versions R2020 and prior could allow internal network scanning and expose sensitive device information. CVE-2021-42794 has been assigned to this vulnerability. A CVSS v3 base score of 5.3 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/ C:L/I:N/A:N ). 3.2.3 IMPROPER ACCESS CONTROL CWE-284 AVEVA Edge versions R2020 and prior could allow unauthenticated arbitrary commands to be executed with the security context of the StADOSvr.exe process. In most instances, this will be a standard-privileged user account under which the AVEVA Edge runtime was started. It's possible for a high-privileged service account to have been configured and assigned for running AVEVA Edge runtime. CVE-2021-42796 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/ C:H/I:H/A:H ). 3.2.4 PATH TRAVERSAL: '\\UNC\SHARE\NAME\' (WINDOWS UNC SHARE) CWE-40 AVEVA Edge versions R2020 and prior could allow an unauthenticated actor to trick the AVEVA Edge runtime into disclosing a Windows access token of the user account configured for accessing external DB resources. CVE-2021-42797 has been assigned to this vulnerability. A CVSS v3 base score of 8.6 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:C/ C:H/I:N/A:N ). 3.3 BACKGROUND o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing o COUNTRIES/AREAS DEPLOYED: Worldwide o COMPANY HEADQUARTERS LOCATION: United Kingdom 3.4 RESEARCHER Sam Hanson of Dragos reported these vulnerabilities to CISA. 4. MITIGATIONS AVEVA recommends organizations evaluate the impact of these vulnerabilities based on operational environment, architecture, and product implementations. o Users of AVEV Edge (formerly known as InduSoft Web Studio) up to 2020 R2 SP1 w/ HF 2020.2.00.40 should apply AVEVA Edge 2020 R2 SP2 as soon as possible. o Restrict access to port TCP/3997 CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability these vulnerabilities. Specifically, users should: o Minimize network exposure for all control system devices and/or systems, and ensure they are not accessible from the Internet . o Locate control system networks and remote devices behind firewalls and isolate them from business networks. o When remote access is required, use secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as its 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 at cisa.gov/ics . 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 . Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov/ics 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 exploits specifically target these vulnerabilities. For any questions related to this report, please contact the CISA at: Email: CISAservicedesk@cisa.dhs.gov Toll Free: 1-888-282-0870 CISA continuously strives to improve its products and services. You can help by choosing one of the links below to provide feedback about this product. - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. 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Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: https://auscert.org.au/gpg-key/ iQIVAwUBY32aGskNZI30y1K9AQi6AA//TjB0w27nwJtjnL7dy0ChuF0wJm+BbgSS s8EaljSTX/cOCY2+iCqpqxGr4jQuxSSZ7dSIK3c0lDRdIRQF750PnX4efwdpn7I4 bmjIwFjyly48IAymMj8r3BmxXKldPl1XPwIyJ70Ru3ADVOSQETY6s43TC5ZrnYxI lqLzMVtgYSs+0wshNv7ULM+v0JVYwYmvyZV10XIp95gDaNxB6vFJgWKQ9HQVESEH iBcwwQl6c/Ij8hOjpHCl1Gq1S5WjA1anu0k1R6BfAfQ3CRLmvYkTv75Ai1ZoAJwx PyhBGXB72K5WrzQvVaCrHsvVuMKqW/lehYE/oW/vsK4t8WMqmLPut1/7yatGBd5w avbuCqBhQk6wgcnyWYJTOmVHmcqHh++nhGw39Pnx7HoE54RkNc57v4Wi86/fns8s aUlToMBDQ6ssuo++wtBI0PHIDDCbAzfaJMl9hD0bNsGK6todCFbDZmp8xrds/kJQ m1RRtWG1lReEFt9T1aTX7axVV1aGcCCH5aae6W+bzhxzwRDnngHr1BaGwlV1GH8a XGBeYrRPKpWUFRPiqto9oVikiYFrdc7OYqOfi0Gxi0cxGH/YLKgqQbZxfbFXzTPH 72d3aV3L99Cq48/KUPGeULEgoFO5+qfHolEerzRWxz5/dPEHd2NGKDsgQtB7/ORb YfXAY1XFGyk= =kf3+ -----END PGP SIGNATURE-----