CVE-2021-45420 : What You Need to Know

Emerson Dixell XWEB-500 products are affected by an arbitrary file write vulnerability that can lead to denial of service and potential remote code execution.

Understanding CVE-2021-45420

Emerson Dixell XWEB-500 products face a critical security issue due to an arbitrary file write vulnerability.

What is CVE-2021-45420?

The vulnerability in /cgi-bin/logo_extra_upload.cgi, /cgi-bin/cal_save.cgi, and /cgi-bin/lo_utils.cgi allows attackers to write files on the system without authentication, potentially leading to denial of service attacks and remote code execution.

The Impact of CVE-2021-45420

Attackers can write any file on the target system without authentication
This vulnerability can result in denial of service and potentially allow remote code execution

Technical Details of CVE-2021-45420

Emerson Dixell XWEB-500 products are vulnerable to arbitrary file write attacks.

Vulnerability Description

The vulnerability allows unauthorized users to write files on the target system, posing a severe security risk.

Affected Systems and Versions

Product: Emerson Dixell XWEB-500
Vendor: Emerson
Version: Not applicable

Exploitation Mechanism

Attackers can exploit the vulnerability in /cgi-bin/logo_extra_upload.cgi, /cgi-bin/cal_save.cgi, and /cgi-bin/lo_utils.cgi to write files without authentication.

Mitigation and Prevention

Steps to address and prevent the vulnerability in Emerson Dixell XWEB-500 products.

Immediate Steps to Take

Disable or restrict access to vulnerable paths
Implement network segmentation to isolate critical systems
Conduct regular security assessments and audits

Long-Term Security Practices

Keep software and systems up to date
Implement strong access controls and authentication mechanisms
Educate users and staff on security best practices

Patching and Updates

As the product is no longer supported, consider replacing it with a supported alternative
Apply security patches or upgrades if available