CVE-2021-38648: Open Management Infrastructure Elevation of Privilege Vulnerability

Overview

Severity: High (CVSS 7.8)
CVSS Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Category: Elevation of Privilege
Exploit Status: Not Exploited
Exploitation Likelihood: Less Likely
Patch Tuesday: 2021-Sep
Released: 2021-09-14
Last Updated: 2021-09-20
EPSS Score: 31.79% (percentile: 96.8%)
CISA KEV: Listed — due 2021-11-17

FAQ

Update 9/16/2021: Where can I find more information about how to know if I'm protected and what steps can be taken to be protected? Please see Additional Guidance Regarding OMI Vulnerabilities within Azure VM Management Extensions for more information. What is OMI? Open Management Infrastructure (OMI) is an open source project to further the development of a production quality implementation of the DMTF CIM/WBEM standards. The OMI CIMOM is also designed to be portable and highly modular. In order to attain its small footprint, it is coded in C, which also makes it a much more viable CIM Object Manager for embedded systems and other infrastructure components that have memory constraints for their management processor. OMI is also designed to be inherently portable. It builds and runs today on most UNIX® systems and Linux. In addition to OMI's small footprint, it also demonstrates very high performance. Refer this link for more details : GitHub - microsoft/omi: Open Management Infrastructure How do I protect myself from this vulnerability? Please see Additional Guidance Regarding OMI Vulnerabilities within Azure VM Management Extensions for more information. The updates for this vulnerability were published on GitHub on August 11, 2021. Why is Microsoft just now releasing a CVE? The fix to address this vulnerability in open-source code was made available on August 11 to provide partners who depend on this software time to implement the updates before we released the details of the vulnerability.

Detection & Weaponization (1 sources)

Maturity: Exploit

Metasploit modules: Microsoft OMI Management Interface Authentication Bypass

Affected Products (10)

Azure

Open Management Infrastructure
Azure Automation State Configuration, DSC Extension
Azure Automation Update Management
Log Analytics Agent
Azure Diagnostics (LAD)
Container Monitoring Solution
Azure Security Center
Azure Sentinel
Azure Stack Hub

System Center

System Center Operations Manager (SCOM)

Security Updates (1)

Release Notes

Acknowledgments

<a href="https://twitter.com/shirtamari">Shir Tamari</a> with <a href="https://wiz.io">Wiz.io</a>, <a href="https://twitter.com/nirohfeld">Nir Ohfeld</a> with <a href="https://wiz.io">Wiz.io</a>

Revision History

2021-09-14: Information published.
2021-09-16: The following revisions have been made: 1) Additional affected products added to the Security Updates table. 2) FAQ updated to provide link to more information about protecting resources. See Additional Guidance Regarding OMI Vulnerabilities within Azure VM Management Extensions for more information.
2021-09-17: The following revisions have been made: 1) In the Security Updates table, additional affected products have been added. 2) Additional Guidance Regarding OMI Vulnerabilities within Azure VM Management Extensions has been updated with further information about identifying VMs that are affected by this vulnerability.
2021-09-20: The following revisions have been made in the Security Updates table: 1) Updated version number of Azure Diagnostics (LAD) 2) Added information for new updates available for Azure Stack Hub.