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CVE-2021-42854 : Exploit Details and Defense Strategies

Discover the critical directory traversal vulnerability in SteelCentral AppInternals Dynamic Sampling Agent's PluginServlet with a CVSS base score of 9.8. Learn about affected versions and mitigation steps.

A directory traversal vulnerability in SteelCentral AppInternals Dynamic Sampling Agent allows for malicious payload injection, posing a critical threat.

Understanding CVE-2021-42854

What is CVE-2021-42854?

The SteelCentral AppInternals Dynamic Sampling Agent's PluginServlet is vulnerable to directory traversal attacks at the "/api/appInternals/1.0/plugin/pmx" endpoint due to lack of input validation.

The Impact of CVE-2021-42854

The vulnerability has a CVSS base score of 9.8, indicating a critical severity level with high impact on confidentiality, integrity, and availability.

Technical Details of CVE-2021-42854

Vulnerability Description

        Directory traversal vulnerability in PluginServlet
        Lack of input validation allows malicious payload injection

Affected Systems and Versions

        SteelCentral AppInternals Dynamic Sampling Agent 10.x
        Versions less than 12.13.0 and 11.8.8 (custom builds) affected

Exploitation Mechanism

        Attack complexity: Low
        Attack vector: Network
        Privileges required: None

Mitigation and Prevention

Immediate Steps to Take

        Apply vendor-supplied patches promptly
        Implement strict input validation mechanisms

Long-Term Security Practices

        Conduct regular security assessments
        Educate users on safe browsing habits
        Employ intrusion detection systems

Patching and Updates

Stay informed about security updates and apply patches regularly.

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