CVE-2021-36123 : Security Advisory and Response

An issue was discovered in Echo ShareCare 8.15.5. The TextReader feature in General/TextReader/TextReader.cfm is susceptible to a local file inclusion vulnerability when processing remote input in the textFile parameter from an authenticated user, leading to the ability to read arbitrary files on the server filesystems as well as any files accessible via Universal Naming Convention (UNC) paths.

Understanding CVE-2021-36123

This section provides a detailed insight into the CVE-2021-36123 vulnerability.

What is CVE-2021-36123?

CVE-2021-36123 involves a local file inclusion vulnerability in Echo ShareCare 8.15.5, specifically in the TextReader feature, that allows an authenticated user to read arbitrary files on the server's filesystem and those accessible via UNC paths.

The Impact of CVE-2021-36123

The impact of this vulnerability is significant as it permits an attacker to access sensitive information stored on the server's filesystem and any files available through UNC paths.

Technical Details of CVE-2021-36123

In this section, you will find technical details of the CVE-2021-36123 vulnerability.

Vulnerability Description

The vulnerability in Echo ShareCare 8.15.5 arises due to improper handling of remote input in the textFile parameter, enabling an attacker to include and read files.

Affected Systems and Versions

Echo ShareCare 8.15.5 is the affected version by CVE-2021-36123, posing a risk to systems using this specific version.

Exploitation Mechanism

Exploitation of this vulnerability involves crafting specific requests with malicious input in the textFile parameter to trigger the file inclusion flaw.

Mitigation and Prevention

This section covers the mitigation strategies and preventive measures for CVE-2021-36123.

Immediate Steps to Take

Users are advised to restrict access to the vulnerable feature, validate user inputs, and implement proper input sanitization to mitigate the risk.

Long-Term Security Practices

Implementing regular security patches, conducting security audits, and staying informed about security best practices can enhance long-term security.

Patching and Updates

It is crucial to apply the latest patches and updates provided by the vendor to fix the vulnerability in Echo ShareCare 8.15.5.