CVE-2020-5808 : Security Advisory and Response

In certain scenarios in Tenable.sc prior to version 5.17.0, a vulnerability exists that could allow a scanner to operate outside the user's defined scan zone without proper configuration.

Understanding CVE-2020-5808

This CVE involves an improper access control issue in Tenable.sc.

What is CVE-2020-5808?

The vulnerability in Tenable.sc prior to version 5.17.0 allows a scanner to function outside the user's designated scan zone without the necessary zone specification in the Automatic Distribution configuration.

The Impact of CVE-2020-5808

The vulnerability could potentially lead to unauthorized scanning activities outside the intended scope, compromising the security posture of the system.

Technical Details of CVE-2020-5808

This section provides detailed technical information about the CVE.

Vulnerability Description

The vulnerability in Tenable.sc allows a scanner to operate beyond the user's defined scan zone without proper configuration.

Affected Systems and Versions

Product: Tenable.sc
Versions affected: All versions prior to 5.17.0

Exploitation Mechanism

The vulnerability can be exploited by configuring the scanner to operate outside the designated scan zone without the required zone specification.

Mitigation and Prevention

Protecting systems from CVE-2020-5808 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Tenable.sc to version 5.17.0 or later to mitigate the vulnerability.
Review and adjust the Automatic Distribution configuration to ensure proper scan zone settings.

Long-Term Security Practices

Regularly monitor and audit scan configurations to prevent unauthorized scanning activities.
Implement access controls and restrictions to limit scanner operations within defined scan zones.

Patching and Updates

Apply patches and updates provided by Tenable to address the vulnerability in Tenable.sc.