CVE-2021-27461 Explained : Impact and Mitigation

A vulnerability has been found in multiple revisions of Emerson Rosemount X-STREAM Gas Analyzer. The affected webserver applications allow access to stored data that can be obtained by using specially crafted URLs.

Understanding CVE-2021-27461

This CVE-2021-27461 advisory pertains to a vulnerability discovered in various versions of Emerson Rosemount X-STREAM Gas Analyzer.

What is CVE-2021-27461?

The vulnerability in Emerson Rosemount X-STREAM Gas Analyzer allows attackers to access stored data via manipulated URLs, potentially leading to unauthorized information disclosure.

The Impact of CVE-2021-27461

Exploitation of this vulnerability could result in unauthorized access to sensitive data stored within the affected webserver applications.

Technical Details of CVE-2021-27461

The following technical details outline the specifics of CVE-2021-27461.

Vulnerability Description

CVE-2021-27461 involves improper limitation of a pathname to a restricted directory (path traversal), as identified by CWE-22.

Affected Systems and Versions

The vulnerability impacts multiple revisions of Emerson Rosemount X-STREAM Gas Analyzer, specifically versions: X-STREAM enhanced XEGP – all revisions, X-STREAM enhanced XEGK – all revisions, X-STREAM enhanced XEFD – all revisions.

Exploitation Mechanism

Attackers can exploit this vulnerability by using specially crafted URLs to gain unauthorized access to stored data within the webserver applications.

Mitigation and Prevention

To address CVE-2021-27461, consider the following mitigation strategies and security best practices.

Immediate Steps to Take

Apply security patches provided by the vendor as soon as they are available.
Monitor and restrict network traffic to and from affected devices.

Long-Term Security Practices

Regularly update firmware and software to the latest versions.
Implement network segmentation to isolate critical devices from potential threats.

Patching and Updates

Stay informed about security updates and advisories related to Emerson Rosemount X-STREAM Gas Analyzer to promptly apply patches and protect against potential threats.