CVE-2021-42787 : Vulnerability Insights and Analysis

CVE-2021-42787, discovered on February 23, 2022, involves directory traversal vulnerabilities in the SteelCentral AppInternals Dynamic Sampling Agent's AgentConfigurationServlet.

Understanding CVE-2021-42787

What is CVE-2021-42787?

It was found that the SteelCentral AppInternals Dynamic Sampling Agent's AgentConfigurationServlet is susceptible to directory traversal attacks, allowing malicious payloads to be injected.

The Impact of CVE-2021-42787

This vulnerability has a CVSS base score of 9.4, categorizing it as critical. It can lead to high availability and integrity impact.

Technical Details of CVE-2021-42787

Vulnerability Description

The issue resides in the lack of input validation at the "/api/appInternals/1.0/agent/configuration" API, enabling unauthorized access.

Affected Systems and Versions

SteelCentral AppInternals Dynamic Sampling Agent 10.x
SteelCentral AppInternals Dynamic Sampling Agent 12.13.0
SteelCentral AppInternals Dynamic Sampling Agent 11.8.8

Exploitation Mechanism

Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged

Mitigation and Prevention

Immediate Steps to Take

Apply security patches promptly
Monitor network traffic for any suspicious activities

Long-Term Security Practices

Implement proper input validation mechanisms
Conduct regular security assessments

Patching and Updates

Regularly update the SteelCentral AppInternals Dynamic Sampling Agent to the latest secure versions.