Schweitzer Engineering Laboratories, Inc. Compass and AcSELerator Architect Incorrect Default Permissions, XXE, Resource Exhaustion (CVE-2018-10608 CVE-2018-10600 CVE-2018-10604 )

# ICS Advisory (ICSA-18-191-02) ## Schweitzer Engineering Laboratories, Inc. Compass and AcSELerator Architect Original release date: July 10, 2018 | Last revised: July 11, 2018 [Print Document](javascript:window.print\(\);) [Tweet](https://twitter.com/share?url=https%3A%2F%2Fus- cert.cisa.gov%2Fics%2Fadvisories%2FICSA-18-191-02) [Like Me](https://www.facebook.com/sharer.php?u=https%3A%2F%2Fus- cert.cisa.gov%2Fics%2Fadvisories%2FICSA-18-191-02) [Share](http://www.addthis.com/bookmark.php?url=https%3A%2F%2Fus- cert.cisa.gov%2Fics%2Fadvisories%2FICSA-18-191-02) ### Legal Notice All information products included in [https://us-cert.gov/ics](/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/](/tlp/). * * * ## 1\. EXECUTIVE SUMMARY * **CVSS v3 8.2** * **ATTENTION:** Exploitable remotely/Low skill level to exploit/Public exploits are available for these vulnerabilities * **Vendor:** Schweitzer Engineering Laboratories, Inc. (SEL) * **Equipment:** Compass and AcSELerator Architect * **Vulnerabilities:** Incorrect Default Permissions, XXE, Resource Exhaustion ## 2\. RISK EVALUATION Successful exploitation of these vulnerabilities could allow modification/replacement of files within the Compass installation directory, disclosure of information, or denial of service. ## 3\. TECHNICAL DETAILS ### 3.1 AFFECTED PRODUCTS The following products from SEL are affected. Not all products are affected by all vulnerabilities. * Compass Version 3.0.5.1 and prior, and * AcSELerator Architect Version 2.2.24.0 and prior. ### 3.2 VULNERABILITY OVERVIEW **3.2.1 [INCORRECT DEFAULT PERMISSIONS CWE-276](https://cwe.mitre.org/data/definitions/276.html)** Incorrect default permissions allows all users full access to the SEL Compass directory, which may allow modification or overwriting of files within the Compass installation folder, resulting in escalation of privilege and/or malicious code execution. [CVE-2018-10604](http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-10604) has been assigned to this vulnerability. A CVSS v3 base score of 8.2 has been calculated; the CVSS vector string is ([AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H](https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H)). **3.2.2 [IMPROPER RESTRICTION OF XML EXTERNAL ENTITY REFERENCE ('XXE') CWE-611](https://cwe.mitre.org/data/definitions/611.html)** An XXE vulnerability allows unsanitized input to be passed to the AcSELerator Architect XML parser, which may allow disclosure and retrieval of arbitrary data, arbitrary code execution (in certain situations on specific platforms), and denial of service attacks. [CVE-2018-10600](http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-10600) has been assigned to this vulnerability. A CVSS v3 base score of 8.2 has been calculated; the CVSS vector string is ([AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:L](https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:L)). **3.2.3 [UNCONTROLLED RESOURCE CONSUMPTION ('RESOURCE EXHAUSTION') CWE-400](https://cwe.mitre.org/data/definitions/400.html)** A resource exhaustion vulnerability can be exploited when the AcSELerator Architect FTP client connects to a malicious FTP server, which may cause denial of service via 100% CPU utilization. Restart of the application is required. [CVE-2018-10608](http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-10608) has been assigned to this vulnerability. A CVSS v3 base score of 6.5 has been calculated; the CVSS vector string is ([AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H](https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H)). ### 3.3 BACKGROUND * **CRITICAL INFRASTRUCTURE SECTORS:** Energy * **COUNTRIES/AREAS DEPLOYED:** Worldwide * **COMPANY HEADQUARTERS LOCATION:** USA ### 3.4 RESEARCHER Gjoko Krstic of Applied Risk reported this vulnerability to NCCIC. ## 4\. MITIGATIONS SEL recommends affected users upgrade to latest release: SEL Compass v3.0.6.1 or later <https://selinc.com/products/compass/#tab-downloads> SEL AcSELerator v2.2.29.0 or later <https://selinc.com/products/5032/#tab-downloads> Contact SEL Support for specific instructions and downloads: <https://selinc.com/support/?categories.Customer%20Service> NCCIC recommends 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](/ics/alerts/ICS-ALERT-10-301-01). * 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. NCCIC reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. NCCIC also provides a section for [control systems security recommended practices](/ics/content/recommended-practices) on the ICS-CERT web page. Several recommended practices are available for reading and download, including [Improving Industrial Control Systems Cybersecurity with Defense-in- Depth Strategies](/sites/default/files/recommended_practices/NCCIC_ICS- CERT_Defense_in_Depth_2016_S508C.pdf). Additional mitigation guidance and recommended practices are publicly available on the [ICS-CERT website](/ics/) in the Technical Information Paper, [ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies](/ics/tips/ICS-TIP-12-146-01B). 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.