CVE-2021-22819 : Exploit Details and Defense Strategies
Learn about CVE-2021-22819, a CWE-1021 vulnerability in Schneider Electric products like EVlink City and Parking. Understand the impact, affected systems, exploitation, and mitigation steps.
A CWE-1021 Improper Restriction of Rendered UI Layers or Frames vulnerability has been discovered in certain Schneider Electric products. This vulnerability could allow attackers to make unintended changes to product settings or user accounts by tricking users into interacting with a malicious web interface. The affected products include EVlink City EVC1S22P4 / EVC1S7P4, EVlink Parking EVW2 / EVF2 / EVP2PE, and EVlink Smart Wallbox EVB1A.
Understanding CVE-2021-22819
This section provides an overview of the CVE-2021-22819 vulnerability and its impact on affected systems.
What is CVE-2021-22819?
CVE-2021-22819 is a CWE-1021 Improper Restriction of Rendered UI Layers or Frames vulnerability present in specific Schneider Electric products. It could lead to unauthorized alterations in product configurations or user accounts through deceptive web interfaces.
The Impact of CVE-2021-22819
The vulnerability poses a risk of unauthorized modifications to product settings or user accounts when users are lured into engaging with a compromised web interface embedded in iframes.
Technical Details of CVE-2021-22819
In this section, we delve into the technical aspects of the CVE-2021-22819 vulnerability.
Vulnerability Description
The vulnerability, categorized under CWE-1021, allows threat actors to manipulate product configurations and user accounts by leveraging malicious iframes on web interfaces.
Affected Systems and Versions
Schneider Electric's EVlink City EVC1S22P4 / EVC1S7P4, EVlink Parking EVW2 / EVF2 / EVP2PE, and EVlink Smart Wallbox EVB1A versions prior to R8 V3.4.0.2 are impacted by this vulnerability.
Exploitation Mechanism
Attackers can exploit this vulnerability by deceiving users into interacting with the compromised web interface within iframes, leading to unauthorized changes in product settings and user accounts.
Mitigation and Prevention
This section outlines steps to mitigate and prevent the exploitation of CVE-2021-22819.
Immediate Steps to Take
Users of the affected Schneider Electric products should apply security patches promptly and ensure that users are cautious while interacting with web interfaces to avoid falling prey to deceptive tactics.
Long-Term Security Practices
Implementing a comprehensive cybersecurity strategy, including regular security updates, employee training on safe online practices, and monitoring for unauthorized activities, can enhance the long-term security posture.
Patching and Updates
Schneider Electric users should regularly check for security updates and apply patches provided by the vendor to address vulnerabilities and protect their systems.