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Threat Brief: OMI Vulnerabilities (CVE-2021-38645, CVE-2021-38647, CVE-2021-38648 and CVE-2021-38649) ![Clock Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-clock.svg) 2 min read Related Products [![Network Security CN-Series icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/06/strata_RGB_logo_Icon_Color.png)Network Security CN-Series](https://unit42.paloaltonetworks.com/product-category/network-security-cn-series/ "Network Security CN-Series")[![Prisma Cloud Compute icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/06/prisma_RGB_logo_Icon_Color.png)Prisma Cloud Compute](https://unit42.paloaltonetworks.com/product-category/prisma-cloud-compute/ "Prisma Cloud Compute") * ![Profile Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-profile-grey.svg) By: * [Nathaniel Quist](https://unit42.paloaltonetworks.com/author/nathaniel-quist/) * ![Published Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-calendar-grey.svg) Published:September 16, 2021 * ![Tags Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-category.svg) Categories: * [Cloud Cybersecurity Research](https://unit42.paloaltonetworks.com/category/cloud-cybersecurity-research/) * [High Profile Threats](https://unit42.paloaltonetworks.com/category/top-cyberthreats/) * [Vulnerabilities](https://unit42.paloaltonetworks.com/category/vulnerabilities/) * ![Tags Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-tags-grey.svg) Tags: * [Azure](https://unit42.paloaltonetworks.com/tag/azure/) * [CVE-2021-38645](https://unit42.paloaltonetworks.com/tag/cve-2021-38645/) * [CVE-2021-38647](https://unit42.paloaltonetworks.com/tag/cve-2021-38647/) * [CVE-2021-38648](https://unit42.paloaltonetworks.com/tag/cve-2021-38648/) * [CVE-2021-38649](https://unit42.paloaltonetworks.com/tag/cve-2021-38649/) * [OMI](https://unit42.paloaltonetworks.com/tag/omi/) * [OMIGOD](https://unit42.paloaltonetworks.com/tag/omigod/) * [![Download Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-download.svg)](https://unit42.paloaltonetworks.com/omi-vulnerabilities/?pdf=download&lg=en&_wpnonce=279fa6c5e6 "Click here to download") * [![Print Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-print.svg)](https://unit42.paloaltonetworks.com/omi-vulnerabilities/?pdf=print&lg=en&_wpnonce=279fa6c5e6 "Click here to print") Share![Down arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/down-arrow.svg) * ![Link Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-share-link.svg) * [![Link Email](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-sms.svg)]( "Share in email") * [![Facebook Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-fb-share.svg)](https://www.facebook.com/sharer/sharer.php?u=https%3A%2F%2Funit42.paloaltonetworks.com%2Fomi-vulnerabilities%2F "Share in Facebook") * [![LinkedIn Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-linkedin-share.svg)]( "Share in LinkedIn") * [![Twitter Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-twitter-share.svg)]( "Share in Twitter") * [![Reddit Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-reddit-share.svg)](https://www.paloaltonetworks.com//www.reddit.com/submit?url=https%3A%2F%2Funit42.paloaltonetworks.com%2Fomi-vulnerabilities%2F&ts=markdown "Share in Reddit") * [![Mastodon Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-mastodon-share.svg)]( "Share in Mastodon") ## Executive Summary On Sept. 14, 2021, Microsoft's Security Response Center (MSRC) [released security patches](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-38647) detailing the findings of four critical vulnerabilities affecting the Microsoft Azure package [Open Management Infrastructure (OMI)](https://github.com/microsoft/omi). The open-source OMI package is designed to provide a portable infrastructure backbone for web-based management tools, such as diagnostic monitoring, log analytic services and automation functionality within UNIX and Linux systems. OMI is used by Microsoft Azure to manage UNIX packages within Azure virtual machines (VMs), containers and serverless cloud instances. According to Microsoft's security release notes, any system created, or which has updated its OMI package, after Aug. 11, 2021, should automatically be patched. ## Four Critical OMI Vulnerabilities The four critical vulnerabilities discovered by security researchers from Wiz include one unauthenticated remote code execution (RCE) and three privilege escalation vulnerabilities. * [CVE-2021-38645 -- Privilege Escalation vulnerability](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-38645) * [CVE-2021-38647 -- Unauthenticated RCE as root](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-38647) * [CVE-2021-38648 -- Privilege Escalation vulnerability](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-38648) * [CVE-2021-38649 -- Privilege Escalation vulnerability](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-38649) Dubbed OMIGOD, the four vulnerabilities were found to directly affect Azure cloud instances using the following Azure services: * Azure Automation * Azure Automatic Update * Azure Operations Management Suite * Azure Log Analytics * Azure Configuration Management * Azure Diagnostics [Prisma Cloud Compute](https://docs.paloaltonetworks.com/prisma/prisma-cloud/prisma-cloud-admin-compute/vulnerability_management/vuln_management_rules) Defender agents can detect whether any Azure system is vulnerable to any of the four CVEs. Additionally, Prisma Cloud users can also build a custom vulnerability detection rule to identify if any system is running an OMI package with a version previous to 1.6.8.1. To build a custom vulnerability detection rule, open Prisma Cloud and navigate to the following page: * Compute \> Manage \> System \> Custom Feeds \> Custom Vulnerabilities \> Import CSV * Create a csv file and populate that file with the following text: name,type,package,minVersionInclusive,maxVersionInclusive,md5 OMIGOD,package,omi,\*,1.6.8.0, Palo Alto Networks Azure-based [VM-](https://www.paloaltonetworks.com/prisma/virtual-firewall-security?utm_source=google&utm_medium=paid-search&utm_term=virtual%20firewall&utm_campaign=NGFW-AMER-EN-Search-Lead_Gen-US/CA-VM_Series&utm_network=&sfdcid=7014u000000eW34AAE&_bt=537069486154&_bm=p&_bn=g&gclid=EAIaIQobChMI3rrMzfyD8wIVgpOzCh02igJIEAAYASAAEgKu0fD_BwE) and [CN-Series](https://www.paloaltonetworks.com/network-security/cn-series) Firewall instances do not use the OMI package and are not vulnerable to the OMI critical vulnerabilities. ## Remediation Prisma Cloud will create an alert for any system which maintains an OMI package vulnerable to the OMI critical vulnerabilities. Should a system be identified as vulnerable, the following steps should be taken for that Azure Cloud Instance: 1. Log on to the Azure instance using SSH. 2. Execute the following command: 1. Debian -- sudo apt list omi 2. CentOS -- sudo yum list omi 3. Determine if OMI version is \< 1.6.8.1. 4. If the system maintains an older version of OMI, perform the steps listed within the [OMI GitHub Page](https://github.com/microsoft/omi/releases/tag/v1.6.8-1). ## Conclusion On Sept. 14, 2021, security researchers from Wiz released a report detailing the findings of four critical vulnerabilities affecting the Microsoft Azure package OMI. Dubbed OMIGOD, the four vulnerabilities were found to directly affect Azure Cloud Instances. Palo Alto Networks Azure-based VM and CN Series Firewall instances do not use the OMI package and are not vulnerable to the OMI critical vulnerabilities. Customers of Prisma Cloud have the ability to create alerts to detect vulnerabilities. ### Additional Resources * [Microsoft Releases Security Update for Azure Linux Open Management Infrastructure](https://us-cert.cisa.gov/ncas/current-activity/2021/09/16/microsoft-releases-security-update-azure-linux-open-management) * [Open Management Infrastructure GitHub](https://github.com/microsoft/omi) * [OMI GitHub v.1.6.8-1](https://github.com/microsoft/omi/releases/tag/v1.6.8-1) Back to top ### Tags * [Azure](https://unit42.paloaltonetworks.com/tag/azure/ "Azure") * [CVE-2021-38645](https://unit42.paloaltonetworks.com/tag/cve-2021-38645/ "CVE-2021-38645") * [CVE-2021-38647](https://unit42.paloaltonetworks.com/tag/cve-2021-38647/ "CVE-2021-38647") * [CVE-2021-38648](https://unit42.paloaltonetworks.com/tag/cve-2021-38648/ "CVE-2021-38648") * [CVE-2021-38649](https://unit42.paloaltonetworks.com/tag/cve-2021-38649/ "CVE-2021-38649") * [OMI](https://unit42.paloaltonetworks.com/tag/omi/ "OMI") * [OMIGOD](https://unit42.paloaltonetworks.com/tag/omigod/ "OMIGOD") [Threat Research Center](https://unit42.paloaltonetworks.com "Threat Research") [Next: Dangling Domains: Security Threats, Detection and Prevalence](https://unit42.paloaltonetworks.com/dangling-domains/ "Dangling Domains: Security Threats, Detection and Prevalence") ### Table of Contents * ### Related Articles * [Model Namespace Reuse: An AI Supply-Chain Attack Exploiting Model Name Trust](https://unit42.paloaltonetworks.com/model-namespace-reuse/ "article - table of contents") * [Cloud Logging for Security and Beyond](https://unit42.paloaltonetworks.com/cloud-logging-for-security/ "article - table of contents") * [Attack Paths Into VMs in the Cloud](https://unit42.paloaltonetworks.com/cloud-virtual-machine-attack-vectors/ "article - table of contents") ## Related Resources ![Pictorial representation of a group of people interacting with a dynamic 3D holographic display of colorful, undulating data waves on a table.](https://unit42.paloaltonetworks.com/wp-content/uploads/2025/09/11_Myth-Busting_Overview_1920x900-786x368.jpg) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2025/08/Insights-icon-white.svg)Insights](https://unit42.paloaltonetworks.com/category/insights/) August 4, 2026 [#### The Frontier AI Vulnerability Burst: Industrializing Autonomous Zero-Day Discovery in Open-Source Software](https://unit42.paloaltonetworks.com/frontier-ai-vulnerability-burst/) * [AI](https://unit42.paloaltonetworks.com/tag/ai/ "AI") * [Frontier AI](https://unit42.paloaltonetworks.com/tag/frontier-ai/ "Frontier AI") * [Vulnerability Exploitation](https://unit42.paloaltonetworks.com/tag/vulnerability-exploitation/ "Vulnerability Exploitation") [Read now ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/frontier-ai-vulnerability-burst/ "The Frontier AI Vulnerability Burst: Industrializing Autonomous Zero-Day Discovery in Open-Source Software") ![Pictorial representation of AI-enabled autonomous cyberattacks. A digital illustration depicting abstract, interconnected data streams in vibrant colors on a dark blue background](https://unit42.paloaltonetworks.com/wp-content/uploads/2026/07/AdobeStock_992950050-3-782x440.jpeg) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/06/icon-threat-research.svg)Threat Research](https://unit42.paloaltonetworks.com/category/threat-research/) July 30, 2026 [#### Chinese-Speaking Threat Actor Harnesses AI Models for Autonomous Cyberattacks](https://unit42.paloaltonetworks.com/autonomous-ai-cyber-attack-campaign/) * [ChatGPT](https://unit42.paloaltonetworks.com/tag/chatgpt/ "ChatGPT") * [Claude code](https://unit42.paloaltonetworks.com/tag/claude-code/ "Claude code") * [CVEs](https://unit42.paloaltonetworks.com/tag/cves/ "CVEs") [Read now ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/autonomous-ai-cyber-attack-campaign/ "Chinese-Speaking Threat Actor Harnesses AI Models for Autonomous Cyberattacks") ![Pictorial representation of three zero-day vulnerabilities in Siemens ROX II OT switches. 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Digital illustration of Europe map highlighting network connections and nodes, depicted as glowing points and lines on a dark blue background, emphasizing major cities and connectivity across the continent.](https://unit42.paloaltonetworks.com/wp-content/uploads/2026/06/09_Cloud_cybersecurity_research_Overview_1920x900-786x368.jpg) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/06/icon-threat-research.svg)Threat Research](https://unit42.paloaltonetworks.com/category/threat-research/) June 22, 2026 [#### The Global Namespace Risk: Universal Bucket Hijacking Technique for Cloud Data Exfiltration](https://unit42.paloaltonetworks.com/cloud-bucket-hijacking-risks/) * [AWS](https://unit42.paloaltonetworks.com/tag/aws/ "AWS") * [Bucket hijacking](https://unit42.paloaltonetworks.com/tag/bucket-hijacking/ "bucket hijacking") * [Cloud data exfiltration](https://unit42.paloaltonetworks.com/tag/cloud-data-exfiltration/ "cloud data exfiltration") [Read now ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/cloud-bucket-hijacking-risks/ "The Global Namespace Risk: Universal Bucket Hijacking Technique for Cloud Data Exfiltration") ![Pictorial representation of Vertex AI model uploads. Close-up view of a digital wall displaying various glowing icons, representing a high-tech network interface.](https://unit42.paloaltonetworks.com/wp-content/uploads/2026/06/AdobeStock_1270203474-1-786x354.png) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/06/icon-threat-research.svg)Threat Research](https://unit42.paloaltonetworks.com/category/threat-research/) June 16, 2026 [#### Pickle in the Middle -- Hijacking Vertex AI Model Uploads for Cross-Tenant RCE](https://unit42.paloaltonetworks.com/hijacking-vertex-ai-model/) * [Bucket squatting](https://unit42.paloaltonetworks.com/tag/bucket-squatting/ "bucket squatting") * [Google Cloud](https://unit42.paloaltonetworks.com/tag/google-cloud/ "Google Cloud") * [Joblib](https://unit42.paloaltonetworks.com/tag/joblib/ "joblib") [Read now ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/hijacking-vertex-ai-model/ "Pickle in the Middle – Hijacking Vertex AI Model Uploads for Cross-Tenant RCE") ![Pictorial representation of Cloud Logging services for defense evasion. A vibrant digital illustration depicting a glowing, neon blue cloud symbol positioned over a circuit board landscape. The cloud symbolizes cloud computing technology, and the landscape features intricate electronic circuits with glowing lines and nodes, suggesting high-tech data transfer and connectivity.](https://unit42.paloaltonetworks.com/wp-content/uploads/2026/06/11_Cloud_cybersecurity_research_Overview_1920x900-786x368.jpg) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/06/icon-threat-research.svg)Threat Research](https://unit42.paloaltonetworks.com/category/threat-research/) June 9, 2026 [#### Blinding the Watchmen: Abusing Cloud Logging Services for Defense Evasion and Visibility](https://unit42.paloaltonetworks.com/cloud-logging-defense-evasion/) * [AWS CloudTrail](https://unit42.paloaltonetworks.com/tag/aws-cloudtrail/ "AWS CloudTrail") * [Cloud logging](https://unit42.paloaltonetworks.com/tag/cloud-logging/ "cloud logging") * [Defense evasion](https://unit42.paloaltonetworks.com/tag/defense-evasion/ "defense evasion") [Read now ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/cloud-logging-defense-evasion/ "Blinding the Watchmen: Abusing Cloud Logging Services for Defense Evasion and Visibility") ![Pictorial representation of PAN-OS CVE-2026-0257. A vibrant city skyline at night, with tall skyscrapers and glowing digital beams extending into the sky, suggesting advanced technology and connectivity.](https://unit42.paloaltonetworks.com/wp-content/uploads/2026/06/07_Vulnerabilities_1920x900-786x368.jpg) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/07/top-threats.svg)High Profile Threats](https://unit42.paloaltonetworks.com/category/top-cyberthreats/) June 9, 2026 [#### Threat Brief: Active Exploitation of PAN-OS CVE-2026-0257](https://unit42.paloaltonetworks.com/active-exploitation-of-pan-os-cve-2026-0257/) * [CVE-2026-0257](https://unit42.paloaltonetworks.com/tag/cve-2026-0257/ "CVE-2026-0257") * [Vulnerability](https://unit42.paloaltonetworks.com/tag/vulnerability/ "vulnerability") [Read now ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/active-exploitation-of-pan-os-cve-2026-0257/ "Threat Brief: Active Exploitation of PAN-OS CVE-2026-0257") ![Pictorial representation of ROADtools framework in the cloud. An Asian man wearing glasses sits in front of a computer screen. Reflecting in the glasses are lines indicating analysis. Bright blue city lights illuminate the rest of the image.](https://unit42.paloaltonetworks.com/wp-content/uploads/2026/05/10_Cloud_cybersecurity_research_Overview_1920x900-1-786x368.jpg) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/06/icon-threat-research.svg)Threat Research](https://unit42.paloaltonetworks.com/category/threat-research/) May 22, 2026 [#### Paved With Intent: ROADtools and Nation-State Tactics in the Cloud](https://unit42.paloaltonetworks.com/roadtools-cloud-attacks/) * [Curious Serpens](https://unit42.paloaltonetworks.com/tag/curious-serpens/ "Curious Serpens") * [Entra ID](https://unit42.paloaltonetworks.com/tag/entra-id/ "Entra ID") * [Microsoft Azure](https://unit42.paloaltonetworks.com/tag/microsoft-azure/ "Microsoft Azure") [Read now ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/roadtools-cloud-attacks/ "Paved With Intent: ROADtools and Nation-State Tactics in the Cloud") ![Pictorial representation of CVE-2026-30300. Digital illustration of a map of North America with interconnected glowing lines and dots symbolizing network connections across the continent.](https://unit42.paloaltonetworks.com/wp-content/uploads/2026/05/06_Vulnerabilities_1920x900-3-1-786x368.jpg) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/07/top-threats.svg)High Profile Threats](https://unit42.paloaltonetworks.com/category/top-cyberthreats/) May 6, 2026 [#### Threat Brief: Exploitation of PAN-OS Captive Portal Zero-Day for Unauthenticated Remote Code Execution](https://unit42.paloaltonetworks.com/captive-portal-zero-day/) * [CVE-2026-0300](https://unit42.paloaltonetworks.com/tag/cve-2026-0300/ "CVE-2026-0300") * [EarthWorm](https://unit42.paloaltonetworks.com/tag/earthworm/ "EarthWorm") * [PAN-OS](https://unit42.paloaltonetworks.com/tag/pan-os/ "PAN-OS") [Read now ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/captive-portal-zero-day/ "Threat Brief: Exploitation of PAN-OS Captive Portal Zero-Day for Unauthenticated Remote Code Execution") ![Pictorial representation of a severe Linux vulnerability. 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