CVE-2021-42125 : What You Need to Know
Discover the impact and mitigation of CVE-2021-42125, an Ivanti Avalanche vulnerability allowing attackers to upload dangerous files. Follow immediate and long-term security measures.
An unrestricted file upload vulnerability exists in Ivanti Avalanche before 6.3.3, allowing an attacker to write dangerous files. This CVE has been published by HackerOne on December 7, 2021.
Understanding CVE-2021-42125
This section provides an overview of the vulnerability and its impact.
What is CVE-2021-42125?
CVE-2021-42125 is a vulnerability in Ivanti Avalanche that permits an attacker with access to the Inforail Service to upload harmful files.
The Impact of CVE-2021-42125
The vulnerability enables malicious actors to upload files without restrictions, posing a significant security risk to affected systems.
Technical Details of CVE-2021-42125
Explore the technical aspects of the CVE in this section.
Vulnerability Description
The flaw in Ivanti Avalanche before 6.3.3 allows unauthorized file uploads by attackers leveraging access to the Inforail Service.
Affected Systems and Versions
- Product: Ivanti Avalanche
- Version: 6.3.3 (affected)
Exploitation Mechanism
Attackers exploit the vulnerability by leveraging the unrestricted file upload feature, enabling them to write dangerous files.
Mitigation and Prevention
Discover the steps to address and prevent the CVE.
Immediate Steps to Take
- Update Ivanti Avalanche to version 6.3.3 or later to mitigate the vulnerability.
- Restrict access to the Inforail Service to authorized personnel only.
Long-Term Security Practices
- Regularly monitor for unauthorized file uploads and access.
- Conduct security training to educate staff on file upload risks.
Patching and Updates
Ensure timely installation of security patches and updates to safeguard against known vulnerabilities.