CVE-2021-36286 Explained : Impact and Mitigation
Learn about CVE-2021-36286, a high-severity vulnerability in Dell SupportAssist Client Consumer software allowing non-privileged users to delete arbitrary files on the system. Find out the impact, technical details, affected systems, and mitigation steps.
This article provides an overview of CVE-2021-36286, a vulnerability found in Dell SupportAssist Client Consumer software.
Understanding CVE-2021-36286
CVE-2021-36286 is a high-severity vulnerability affecting Dell SupportAssist Client Consumer versions 3.9.13.0 and earlier. It allows non-privileged users to delete arbitrary files on the system.
What is CVE-2021-36286?
The vulnerability in Dell SupportAssist Client Consumer versions 3.9.13.0 and earlier allows attackers to exploit an arbitrary file deletion flaw using Windows NTFS symbolic links, potentially leading to file deletion by non-privileged users.
The Impact of CVE-2021-36286
With a CVSS base score of 7.1, this high-severity vulnerability poses a significant risk to affected systems. Non-privileged users could potentially delete crucial files, impacting system integrity and availability.
Technical Details of CVE-2021-36286
CVE-2021-36286 arises from an arbitrary file deletion vulnerability in Dell SupportAssist Client Consumer versions 3.9.13.0 and earlier. The exploitation involves the misuse of NTFS symbolic links to delete files on the system.
Vulnerability Description
The flaw arises from SupportAssist clean files functionality's inability to differentiate between junction points and physical folders, enabling non-privileged users to create junction points and delete essential files.
Affected Systems and Versions
Dell SupportAssist Client Consumer versions 3.9.13.0 and any prior versions are vulnerable to this arbitrary file deletion issue.
Exploitation Mechanism
Attackers can abuse Windows NTFS symbolic links to create junction points and exploit the flaw in SupportAssist clean files feature to delete arbitrary files on the system.
Mitigation and Prevention
To mitigate the risks associated with CVE-2021-36286, it is crucial to take immediate and long-term security measures.
Immediate Steps to Take
Users are advised to update Dell SupportAssist Client Consumer to a non-vulnerable version. Additionally, monitor the system for any unusual file deletions and access.
Long-Term Security Practices
Implement strict file access controls and regularly review file deletion logs to detect any unauthorized activities. Educate users about file security best practices.
Patching and Updates
Ensure timely application of security patches released by Dell to address the arbitrary file deletion vulnerability in SupportAssist Client Consumer.