CVE-2021-33356 Explained : Impact and Mitigation

Multiple privilege escalation vulnerabilities in RaspAP versions 1.5 to 2.6.5 have been identified, allowing authenticated remote attackers to inject arbitrary commands into the /installers/common.sh component. This could lead to remote command execution with root privileges.

Understanding CVE-2021-33356

Here is the breakdown of this CVE to help you understand the implications and risks associated with it.

What is CVE-2021-33356?

The CVE-2021-33356 addresses multiple privilege escalation vulnerabilities found in RaspAP versions 1.5 to 2.6.5. Attackers with authenticated remote access can exploit these vulnerabilities by injecting arbitrary commands into the /installers/common.sh component, ultimately resulting in the execution of commands with root privileges.

The Impact of CVE-2021-33356

The exploitation of these vulnerabilities could allow remote attackers to execute arbitrary commands on the target system with root privileges. This could lead to a complete compromise of the affected system, resulting in unauthorized access and control.

Technical Details of CVE-2021-33356

To delve deeper into the technical aspects of this CVE, let's explore the vulnerability, affected systems, versions, and the exploitation mechanism.

Vulnerability Description

The vulnerability lies in the handling of commands within the /installers/common.sh component of RaspAP versions 1.5 to 2.6.5, allowing attackers to inject malicious commands.

Affected Systems and Versions

RaspAP versions 1.5 to 2.6.5 are confirmed to be affected by these privilege escalation vulnerabilities.

Exploitation Mechanism

Authenticated remote attackers can exploit these vulnerabilities by injecting arbitrary commands into the /installers/common.sh component, enabling them to execute commands with root privileges.

Mitigation and Prevention

Understanding the necessary steps to mitigate and prevent the exploitation of CVE-2021-33356 is crucial for safeguarding your systems.

Immediate Steps to Take

Users are advised to update RaspAP to a secure version that addresses these vulnerabilities. Additionally, restrict network access to authorized users only.

Long-Term Security Practices

Implementing a strong authentication mechanism and regular security audits can help prevent unauthorized access and enhance the overall security posture of your systems.

Patching and Updates

Regularly check for security updates and patches released by RaspAP to ensure that your systems are protected against known vulnerabilities.