CVE-2021-26471 Explained : Impact and Mitigation

A detailed analysis of an unauthenticated remote command execution vulnerability found in Vembu products.

Understanding CVE-2021-26471

This CVE describes a critical vulnerability in Vembu products that allows unauthenticated attackers to execute arbitrary shell commands remotely.

What is CVE-2021-26471?

In VembuBDR before 4.2.0.1 and VembuOffsiteDR before 4.2.0.1, there is a flaw in the http API that permits the execution of arbitrary shell commands via a command argument.

The Impact of CVE-2021-26471

With a CVSS base score of 9.8 (Critical), this vulnerability poses a high risk to confidentiality, integrity, and availability as attackers can exploit it without any privileges required.

Technical Details of CVE-2021-26471

This section delves into the specifics of the vulnerability.

Vulnerability Description

The http API /sgwebservice_o.php in Vembu products lacks proper authentication, enabling threat actors to run any commands.

Affected Systems and Versions

VembuBDR versions before 4.2.0.1 and VembuOffsiteDR versions before 4.2.0.1 are impacted by this security issue.

Exploitation Mechanism

By leveraging the command argument in the http API, unauthenticated attackers can remotely execute arbitrary shell commands, leading to a complete compromise of the system.

Mitigation and Prevention

Learn how to protect your systems against CVE-2021-26471.

Immediate Steps to Take

Immediate actions that can be taken to mitigate the risk associated with this vulnerability.

Long-Term Security Practices

Establishing long-term security measures to prevent similar exploits in the future.

Patching and Updates

The importance of applying patches and updates released by Vembu to address this critical vulnerability.