CVE-2021-3029 : Exploit Details and Defense Strategies

This article provides an overview of CVE-2021-3029, detailing the OS Command Injection vulnerability found in EVOLUCARE ECSIMAGING software through version 6.21.5.

Understanding CVE-2021-3029

This CVE identifies a critical OS Command Injection vulnerability in the EVOLUCARE ECSIMAGING software, allowing attackers to exploit the 'file' parameter on the /showfile.php webpage to gain root access.

What is CVE-2021-3029?

EVOLUCARE ECSIMAGING (aka ECS Imaging) through version 6.21.5 is affected by an OS Command Injection flaw that enables attackers to execute arbitrary commands via shell metacharacters and IFS manipulation.

The Impact of CVE-2021-3029

This vulnerability poses a severe risk as attackers can exploit it to gain unauthorized root access to the affected system. It affects products that are no longer supported by the maintainer.

Technical Details of CVE-2021-3029

This section delves into the specific technical aspects of the CVE.

Vulnerability Description

The vulnerability arises from improper input validation on the 'file' parameter of the /showfile.php webpage, allowing malicious actors to execute commands with elevated privileges.

Affected Systems and Versions

EVOLUCARE ECSIMAGING up to version 6.21.5 is impacted by this vulnerability, particularly affecting systems that are no longer under active support by the maintainer.

Exploitation Mechanism

By leveraging shell metacharacters and IFS manipulation on the 'file' parameter of the targeted webpage, threat actors can execute arbitrary commands and potentially gain root access.

Mitigation and Prevention

In light of the CVE-2021-3029 vulnerability, it is crucial to take immediate action to secure affected systems and prevent unauthorized access.

Immediate Steps to Take

System administrators are advised to implement strict input validation mechanisms, restrict access to critical files, and monitor system logs for any suspicious activity.

Long-Term Security Practices

Establishing comprehensive security protocols, conducting regular security audits, and ensuring timely software updates are integral to safeguarding against future vulnerabilities.

Patching and Updates

Users of EVOLUCARE ECSIMAGING are recommended to update to the latest supported version and apply security patches provided by the vendor to remediate the OS Command Injection flaw.