CVE-2021-43358 : Security Advisory and Response

Sunnet eHRD has inadequate filtering for special characters in URLs, allowing remote attackers to perform path traversal attacks without authentication, access restricted paths, and download system files.

Understanding CVE-2021-43358

This CVE involves a vulnerability in Sunnet eHRD that facilitates path traversal attacks.

What is CVE-2021-43358?

The CVE-2021-43358 vulnerability in Sunnet eHRD stems from insufficient URL character filtering, enabling attackers to execute path traversal exploits without requiring authentication, leading to unauthorized access to system files and restricted paths.

The Impact of CVE-2021-43358

The impact of CVE-2021-43358 is rated as HIGH severity with a CVSS base score of 7.5. The confidentiality of affected systems is at risk due to the potential for unauthorized access to sensitive data.

Technical Details of CVE-2021-43358

This section delves into the technical aspects of the CVE.

Vulnerability Description

The vulnerability in Sunnet eHRD allows remote attackers to conduct path traversal attacks by bypassing URL character filtering, leading to unauthorized access to system files and restricted paths.

Affected Systems and Versions

Product: eHRD
Vendor: Sunnet
Vulnerable Versions: 8, 9

Exploitation Mechanism

The vulnerability enables attackers to manipulate URLs to traverse the directory structure, accessing files and directories that should be restricted.

Mitigation and Prevention

Protecting systems from CVE-2021-43358 is crucial to prevent potential exploits.

Immediate Steps to Take

Update Sunnet eHRD to version 10 to mitigate the vulnerability.

Long-Term Security Practices

Implement robust input validation mechanisms to filter user inputs effectively.
Regularly monitor and audit URLs and file access permissions for suspicious activities.

Patching and Updates

Stay informed about security patches and updates for the Sunnet eHRD software to address known vulnerabilities.