CVE-2021-31838 : Security Advisory and Response
Learn about CVE-2021-31838, a command injection vulnerability in MVISION EDR that allows executing arbitrary commands through PowerShell. Understand its impact, affected versions, and mitigation steps.
A command injection vulnerability in MVISION EDR (MVEDR) prior to 3.4.0 allows an authenticated MVEDR administrator to trigger the EDR client to execute arbitrary commands through PowerShell using the EDR functionality 'execute reaction'.
Understanding CVE-2021-31838
This CVE describes a command injection vulnerability in MVISION EDR (MVEDR) versions prior to 3.4.0 that enables an authenticated MVEDR administrator to execute arbitrary commands through PowerShell.
What is CVE-2021-31838?
CVE-2021-31838 is a vulnerability in MVISION EDR (MVEDR) that allows an authenticated administrator to trigger the EDR client to execute arbitrary commands through PowerShell using the 'execute reaction' functionality.
The Impact of CVE-2021-31838
The vulnerability poses a high risk with a CVSS base score of 8.4, allowing attackers to execute arbitrary commands with high impacts on confidentiality, integrity, and availability of affected systems.
Technical Details of CVE-2021-31838
This section provides more in-depth technical details about the vulnerability.
Vulnerability Description
The vulnerability involves a command injection issue in MVISION EDR (MVEDR) versions before 3.4.0, enabling authenticated administrators to run arbitrary commands through PowerShell.
Affected Systems and Versions
MVISION EDR (MVEDR) versions prior to 3.4.0 are impacted by this vulnerability.
Exploitation Mechanism
Attackers can exploit this vulnerability by manipulating environment variables in MVISION EDR to execute unauthorized PowerShell commands.
Mitigation and Prevention
To mitigate the risks associated with CVE-2021-31838, immediate actions and long-term security practices are crucial.
Immediate Steps to Take
- Upgrade MVISION EDR to version 3.4.0 or higher to patch the vulnerability.
- Monitor system logs for any suspicious activities.
Long-Term Security Practices
- Regularly update and patch all software and applications to prevent similar vulnerabilities.
- Implement strong authentication mechanisms and access controls.
Patching and Updates
Maintain regular communication with security vendors and update security protocols as recommended.