CVE-2021-42638 : Security Advisory and Response

PrinterLogic Web Stack versions 19.1.1.13 SP9 and below are vulnerable to pre-auth remote code execution due to unsanitized user input.

Understanding CVE-2021-42638

PrinterLogic Web Stack versions 19.1.1.13 SP9 and below have a critical security vulnerability that allows malicious actors to execute code remotely before authentication.

What is CVE-2021-42638?

CVE-2021-42638 pertains to PrinterLogic Web Stack versions 19.1.1.13 SP9 and earlier, where a lack of user input sanitization leads to the exploitation possibility of unauthorized remote code execution.

The Impact of CVE-2021-42638

This vulnerability allows attackers to execute code on the target system remotely. The consequences include potential unauthorized access, data theft, system compromise, and potential disruption of services.

Technical Details of CVE-2021-42638

PrinterLogic Web Stack versions 19.1.1.13 SP9 and below are susceptible to pre-auth remote code execution due to inadequate input validation.

Vulnerability Description

The flaw arises from the failure to properly sanitize user inputs, enabling attackers to inject and execute malicious code prior to authentication, compromising system integrity.

Affected Systems and Versions

Product: PrinterLogic Web Stack
Versions: 19.1.1.13 SP9 and earlier

Exploitation Mechanism

Attackers exploit the lack of input sanitation in user inputs to inject and execute code remotely, potentially gaining unauthorized access with elevated privileges.

Mitigation and Prevention

It is crucial to take immediate action to address and mitigate the CVE-2021-42638 vulnerability.

Immediate Steps to Take

Update PrinterLogic Web Stack to the latest version that includes a patch addressing the vulnerability.
Implement network segmentation and access controls to limit exposure to potentially malicious activities.
Monitor system logs and network traffic for any abnormal or suspicious behavior.

Long-Term Security Practices

Regularly conduct security assessments and penetration testing to identify and remediate vulnerabilities proactively.
Educate users and administrators on best practices for secure coding, input validation, and system security.
Stay informed about security advisories and updates from vendors to apply patches promptly.

Patching and Updates

Apply patches and updates from PrinterLogic promptly to ensure the security of the Web Stack and protect against known vulnerabilities.