CVE-2021-20595 : What You Need to Know
Explore the impact of CVE-2021-20595, an XML External Entity Reference vulnerability in Mitsubishi Electric Air Conditioning Systems, allowing unauthorized data disclosure and DoS attacks.
A detailed overview of CVE-2021-20595, focusing on the vulnerability in Mitsubishi Electric Air Conditioning Systems and its impact.
Understanding CVE-2021-20595
CVE-2021-20595 relates to an Improper Restriction of XML External Entity Reference vulnerability in Mitsubishi Electric Air Conditioning Systems.
What is CVE-2021-20595?
The CVE-2021-20595 vulnerability allows an unauthenticated remote attacker to disclose sensitive data in the air conditioning system or trigger a denial of service (DoS) by sending specifically crafted packets.
The Impact of CVE-2021-20595
This vulnerability affects various versions of Mitsubishi Electric Air Conditioning System models, potentially leading to unauthorized data disclosure and system disruption.
Technical Details of CVE-2021-20595
A deeper dive into the technical aspects of the vulnerability in terms of description, affected systems, versions, and exploitation mechanism.
Vulnerability Description
The vulnerability results from improper handling of XML external entity references in specific versions of Mitsubishi Electric Air Conditioning Systems, allowing for unauthorized data access or DoS attacks.
Affected Systems and Versions
The vulnerability impacts a range of Mitsubishi Electric Air Conditioning System models, including Centralized Controllers G-50A, GB-50A, GB-24A, and others, with versions Ver.3.35 and prior up to Ver.2.21 and prior.
Exploitation Mechanism
To exploit CVE-2021-20595, a remote attacker without authentication can send maliciously crafted packets to the targeted air conditioning system, leveraging the XML external entity reference vulnerability.
Mitigation and Prevention
Guidance on how to address and mitigate the CVE-2021-20595 vulnerability to enhance system security and protect against potential exploits.
Immediate Steps to Take
Immediate measures should involve applying patches provided by Mitsubishi Electric or implementing temporary workarounds to minimize the risk of exploitation.
Long-Term Security Practices
Ensure regular security assessments, implement network segmentation, and follow best practices in cybersecurity to reduce the likelihood of similar vulnerabilities being exploited.
Patching and Updates
Stay updated with security advisories from Mitsubishi Electric and promptly apply any patches or updates released to address CVE-2021-20595.