CVE-2021-31854 : Exploit Details and Defense Strategies
Learn about CVE-2021-31854, a code injection vulnerability in McAfee Agent for Windows that allows local users to inject arbitrary shell code, potentially leading to privilege escalation.
A command injection vulnerability in McAfee Agent (MA) for Windows before version 5.7.5 allows local users to inject arbitrary shell code into the file cleanup.exe, potentially leading to privilege escalation and obtaining root privileges.
Understanding CVE-2021-31854
This CVE identifier points to a code injection vulnerability in McAfee Agent for Windows that could be exploited by local users for malicious activities.
What is CVE-2021-31854?
CVE-2021-31854 refers to a vulnerability in McAfee Agent for Windows that allows unauthorized local users to inject malicious shell code into specific files, enabling them to execute arbitrary commands and potentially escalate their privileges.
The Impact of CVE-2021-31854
The impact of this vulnerability is rated as high, with a CVSS base score of 7.7. It poses a significant risk to affected systems' confidentiality, integrity, and availability, potentially leading to unauthorized access and control.
Technical Details of CVE-2021-31854
Below are the technical details associated with the CVE-2021-31854 vulnerability:
Vulnerability Description
The vulnerability allows local users to inject arbitrary shell code into the file cleanup.exe, potentially granting them elevated privileges.
Affected Systems and Versions
- Affected Platforms: Windows
- Affected Product: McAfee Agent for Windows
- Affected Versions: Prior to 5.7.5
Exploitation Mechanism
Exploiting this vulnerability involves placing a malicious clean.exe file in a specific folder and running the McAfee Agent deployment feature found in the System Tree. This action enables attackers to execute arbitrary commands.
Mitigation and Prevention
To address the CVE-2021-31854 vulnerability and enhance system security, the following measures are recommended:
Immediate Steps to Take
- Update McAfee Agent for Windows to version 5.7.5 or above to patch the vulnerability.
- Monitor system logs and user activities for any suspicious behavior.
Long-Term Security Practices
- Implement the principle of least privilege to restrict user access.
- Conduct regular security training to enhance user awareness of potential threats.
Patching and Updates
Regularly apply security patches and updates to all software components, including McAfee Agent, to prevent exploitation of known vulnerabilities.