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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2020.3529 ICS Advisory (ICSA-20-287-03) - Flexera InstallShield 14 October 2020 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Flexera InstallShield Publisher: ICS-CERT Operating System: Windows Impact/Access: Execute Arbitrary Code/Commands -- Existing Account Resolution: None CVE Names: CVE-2016-2542 Reference: ASB-2019.0353 ESB-2016.1903 ESB-2016.1852 ESB-2016.1833 Original Bulletin: https://us-cert.cisa.gov/ics/advisories/icsa-20-287-03 - --------------------------BEGIN INCLUDED TEXT-------------------- ICS Advisory (ICSA-20-287-03) Flexera InstallShield Original release date: October 13, 2020 Legal Notice All information products included in https://us-cert.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://www.us-cert.gov/tlp/ . 1. EXECUTIVE SUMMARY o CVSS v3 7.3 o ATTENTION: Low skill level to exploit o Vendor: Flexera o Equipment: InstallShield o Vulnerability: Untrusted Search Path 2. RISK EVALUATION Successful exploitation of this vulnerability could allow execution of a malicious DLL. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following versions of Flexera InstallShield are affected: o Flexera InstallShield through 2015 SP1 o Flexera InstallShield is integrated into many products sold by other companies 3.2 VULNERABILITY OVERVIEW 3.2.1 UNTRUSTED SEARCH PATH CWE-426 The affected product is subject to an untrusted search path vulnerability, which may allow an attacker to execute a malicious DLL if placed into the working directory of the setup-launcher executable file through social engineering. CVE-2016-2542 has been assigned to this vulnerability. A CVSS v3 base score of 7.3 has been calculated; the CVSS vector string is ( AV:L/AC:L/PR:L/UI:R/S:U/ C:H/I:H/A:H ). 3.3 BACKGROUND o CRITICAL INFRASTRUCTURE SECTORS: Multiple Sectors o COUNTRIES/AREAS DEPLOYED: Worldwide o COMPANY HEADQUARTERS LOCATION: United States 3.4 RESEARCHER An anonymous researcher reported this vulnerability to Flexera. 4. MITIGATIONS It is recommended that users contact the product's vendor support team for guidance on any mitigations and workarounds regarding Flexera InstallShield issues in relation to that product. For more information see Flexera's KBR-Article . CISA recommends users take the following measures to protect themselves from social engineering attacks: o Do not click web links or open unsolicited attachments in email messages. o Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams. o Refer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks. 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 us-cert.gov . Several recommended 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 on us-cert.gov in the Technical Information Paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies . Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to CISA for tracking and correlation against other incidents. No known public exploits specifically target this vulnerability. This vulnerability is not exploitable remotely. 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: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBX4aJ++NLKJtyKPYoAQhmDBAAhuQkw8eze98Ib4+5/NcTCR44E3OJyrmM pqdeindd1TUIO3/kOKo/pJJF1uzg2fdXGpKnyYcA3+uN9Ls4zYZO2HgyAsAhk0oS m5oG3fTF3LF4y+kBYsn/rZuZAtSboMz46/yc/nocRoT6HnG5OLLMzUZi9TUgcKx1 U0YWnPcx1UXjNd4ySYIFmulsCzj2vSbd/n3ULmnyeEirvHmrzfXOjUKuTOJUF3/l uCIQdVNFR1miS2K24a3w2m6aOqkWsCmTRuW/zMhDFPgyOJplIqQ1fCttgzww3ZNb XiiS3iHabjRE7YfPOgOIzgaxsDlR6QLAaZVYGaARpUnRla6W2su0QcGYpBRKIWDZ 3ke1DlQvMK7HaP5Jbp95IznJyMAzu9fetNDbSW6e2GSjVvwaHivH3biFDqXkVjMi 3kUmqjIvJ7GZPLy+p6tq8ReS/QfYeGqX1Vy3Yth8Xsm+G4/kDCcQYrgpOxoLmqt/ UOD9XEfY9RNufrNp6u2DEg60V0XmJSGk7zfYbtzsbryMN7BciVpFzOf7I9y+kOcd EV/AOuoCOBuhet6stR2CgvK6+jOturxlODdRRmmDEK5bojCkwcs3ViSyGHu65LfT /bTBplSrxGecOTb6dnxIFC8N0J3YkRib0U8lxlEr3uH2snIQ4DwLmguQtc+Hh2n5 jYPZzrSc0Bg= =JonD -----END PGP SIGNATURE-----