OSIsoft PI Data Archive Deserialization of Untrusted Data, Improper Input (CVE-2018-7531 CVE-2018-7533 CVE-2018-7529 )

# ICS Advisory (ICSA-18-072-02) ## OSIsoft PI Data Archive Original release date: March 13, 2018 [Print Document](javascript:window.print\(\);) [Tweet](https://twitter.com/share?url=https%3A%2F%2Fus- cert.cisa.gov%2Fics%2Fadvisories%2FICSA-18-072-02) [Like Me](https://www.facebook.com/sharer.php?u=https%3A%2F%2Fus- cert.cisa.gov%2Fics%2Fadvisories%2FICSA-18-072-02) [Share](http://www.addthis.com/bookmark.php?url=https%3A%2F%2Fus- cert.cisa.gov%2Fics%2Fadvisories%2FICSA-18-072-02) ### 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/). * * * ### **CVSS v3 7.5** **ATTENTION:** Exploitable remotely/low skill level to exploit. **Vendor:** OSIsoft **Equipment:** PI Data Archive **Vulnerabilities:** Deserialization of Untrusted Data, Improper Input Validation, Incorrect Default Permissions ## AFFECTED PRODUCTS The following versions of PI Data Archive, a data storage solution, are affected: * PI Data Archive versions 2017 and prior. ## IMPACT Successful exploitation of these vulnerabilities could cause loss of network access to the device or allow escalated privileges that may result in gaining full control of the PI Data Archive server. ## MITIGATION OSIsoft recommends that customers upgrade to PI Data Archive 2017 R2. Obtain the update from OSIsoft. OSIsoft has released the following advisory: <https://techsupport.osisoft.com/Troubleshooting/Alerts/AL00339> NCCIC recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities. 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 in the NCCIC Technical Information Paper, [ICS-TIP-12-146-01B-- Targeted Cyber Intrusion Detection and Mitigation Strategies](/ics/tips/ICS- TIP-12-146-01B), that is available for download from the [ICS-CERT website](/ics/). 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. No known public exploits specifically target these vulnerabilities. ## VULNERABILITY OVERVIEW ## [DESERIALIZATION OF UNTRUSTED DATA CWE-502](https://cwe.mitre.org/data/definitions/502.html) Unauthenticated users may modify deserialized data to send custom requests that crash the server. [CVE-2018-7529](http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-7529) has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been calculated; the CVSS vector string is ([AV:N/AC:L/PR:N/UI:N/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:N/S:U/C:N/I:N/A:H)). ## [INCORRECT DEFAULT PERMISSIONS CWE-276](https://cwe.mitre.org/data/definitions/276.html) Insecure default configuration may allow escalation of privileges that gives the actor full control over the system. [CVE-2018-7533](http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-7533) 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](https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H)). ## [IMPROPER INPUT VALIDATION CWE-20](https://cwe.mitre.org/data/definitions/20.html) Unauthenticated users may use unvalidated custom requests to crash the server. [CVE-2018-7531](http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-7531) has been assigned to this vulnerability. A CVSS v3 base score of 5.9 has been calculated; the CVSS vector string is ([AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H](https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H)). ## RESEARCHER OSIsoft self reported these vulnerabilities to NCCIC. ## BACKGROUND **Critical Infrastructure Sectors:** Multiple Sectors **Countries/Areas Deployed:** Worldwide **Company Headquarters Location:** USA