CVE-2021-22810 : What You Need to Know

A CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability exists that could cause arbitrary script execution when a privileged account clicks on a malicious URL specifically crafted for the NMC pointing to a delete policy file.

Understanding CVE-2021-22810

This CVE involves a critical vulnerability related to Cross-site Scripting (XSS) that affects various Schneider Electric products using Network Management Cards (NMCs) with specific versions.

What is CVE-2021-22810?

The vulnerability allows an attacker to execute arbitrary scripts by tricking a privileged user into clicking on a malicious URL designed for the NMC pointing to a delete policy file.

The Impact of CVE-2021-22810

If exploited, this vulnerability could lead to unauthorized remote code execution within the affected systems, potentially compromising the security and integrity of critical infrastructure.

Technical Details of CVE-2021-22810

This section provides insights into the vulnerability description, affected systems, and the exploitation mechanism.

Vulnerability Description

The vulnerability stems from improper neutralization of input during web page generation, allowing attackers to inject and execute malicious scripts.

Affected Systems and Versions

The affected products include 1-Phase and 3-Phase Uninterruptible Power Supply (UPS) systems along with various Network Management Cards (NMCs) from Schneider Electric.

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting a malicious URL specifically targeted at the NMC to trigger the execution of arbitrary scripts, compromising the system's security.

Mitigation and Prevention

To address CVE-2021-22810, it's crucial to take immediate steps, adopt long-term security practices, and apply necessary patches and updates.

Immediate Steps to Take

Immediately restrict access to vulnerable systems, educate users about phishing attacks, and apply temporary workarounds to mitigate the risk of exploitation.

Long-Term Security Practices

Implement strict security policies, conduct regular security assessments, monitor network traffic for suspicious activities, and keep systems up to date with the latest security patches.

Patching and Updates

Ensure that affected systems are patched with the latest updates provided by Schneider Electric to remediate the XSS vulnerability and enhance the overall security posture of the infrastructure.