CVE-2021-42855 : What You Need to Know
Discover CVE-2021-42855 affecting SteelCentral AppInternals Dynamic Sampling Agent. Learn the impact, affected versions, and mitigation steps for local privilege escalation.
CVE-2021-42855, discovered on February 23, 2022, affects SteelCentral AppInternals Dynamic Sampling Agent by Aternity. The vulnerability allows local privilege escalation due to misconfigured write permission on the .debug_command.config file.
Understanding CVE-2021-42855
What is CVE-2021-42855?
It was found that the SteelCentral AppInternals Dynamic Sampling Agent uses a file to store commands, leading to a privilege escalation risk.
The Impact of CVE-2021-42855
The vulnerability poses a high impact on availability, confidentiality, and integrity, with a CVSS base score of 7.8.
Technical Details of CVE-2021-42855
Vulnerability Description
The SteelCentral AppInternals DSA uses a configuration file to map IDs to commands, allowing unauthorized command execution.
Affected Systems and Versions
- SteelCentral AppInternals DSA 10.x
- Versions 12.13.0 and below
- Versions 11.8.8 and below
Exploitation Mechanism
The misconfiguration of the .debug_command.config file enables attackers to execute unauthorized commands.
Mitigation and Prevention
Immediate Steps to Take
- Restrict access to sensitive files and directories
- Regularly monitor and review file permissions
Long-Term Security Practices
- Conduct security awareness training for staff
- Implement the principle of least privilege
Patching and Updates
Apply patches provided by Aternity to address the vulnerability.