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CVE-2021-20076 Explained : Impact and Mitigation

Learn about CVE-2021-20076 affecting Tenable.sc 5.13.0 - 5.17.0. This RCE vulnerability allows unauthorized code execution, posing serious security risks. Take immediate action for mitigation.

Tenable.sc and Tenable.sc Core versions 5.13.0 through 5.17.0 have been identified with a vulnerability allowing an authenticated, unprivileged user to execute Remote Code on the server.

Understanding CVE-2021-20076

This section delves into the intricacies of CVE-2021-20076.

What is CVE-2021-20076?

Tenable.sc versions 5.13.0 through 5.17.0 have an authenticated RCE vulnerability allowing unauthorized code execution through PHP unserialization.

The Impact of CVE-2021-20076

The vulnerability enables an attacker to execute arbitrary commands on the Tenable.sc server, compromising its integrity and data.

Technical Details of CVE-2021-20076

Explore the technical aspects

Vulnerability Description

The flaw in Tenable.sc versions 5.13.0 through 5.17.0 permits RCE for authenticated, unprivileged users through PHP unserialization.

Affected Systems and Versions

Tenable.sc and Tenable.sc Core versions 5.13.0 through 5.17.0 are susceptible to this RCE vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability to execute malicious code on the Tenable.sc server via PHP unserialization.

Mitigation and Prevention

Learn how to mitigate the risks associated with CVE-2021-20076.

Immediate Steps to Take

Users are advised to apply security patches, restrict server access, and monitor for any unusual activities.

Long-Term Security Practices

Implementing network segmentation, regular security audits, and user access controls can enhance overall security.

Patching and Updates

Regularly update Tenable.sc to the latest versions and security patches released by the vendor.

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