CVE-2021-3641 Explained : Impact and Mitigation
Discover the impact of CVE-2021-3641, an Improper Link Resolution Before File Access vulnerability in Bitdefender GravityZone <= 7.1.2.33. Learn how to mitigate and prevent potential attacks.
A detailed overview of the Improper Link Resolution Before File Access vulnerability in Bitdefender GravityZone, affecting versions <= 7.1.2.33.
Understanding CVE-2021-3641
This section provides insights into the vulnerability, its impact, technical details, and mitigation strategies.
What is CVE-2021-3641?
The CVE-2021-3641 is an Improper Link Resolution Before File Access ('Link Following') vulnerability in the EPAG component of Bitdefender Endpoint Security Tools for Windows. This flaw allows a local attacker to trigger a denial of service. It impacts Bitdefender GravityZone versions 7.1.2.33 and earlier.
The Impact of CVE-2021-3641
The vulnerability has a CVSS v3.1 base score of 6.1 (Medium severity), with low attack complexity and vector being local. It poses a high availability impact, with no confidentiality impact, low integrity impact, and low privileges required. User interaction is not needed for exploitation.
Technical Details of CVE-2021-3641
This part delves into the vulnerability description, affected systems, versions, and the exploitation mechanism.
Vulnerability Description
The flaw arises from improper link resolution before file access in the EPAG component of Bitdefender Endpoint Security Tools for Windows, enabling a local attacker to induce a denial of service.
Affected Systems and Versions
Bitdefender GravityZone version 7.1.2.33 and older are impacted by this vulnerability.
Exploitation Mechanism
The vulnerability can be exploited by a local attacker to cause a denial of service in affected Bitdefender GravityZone installations.
Mitigation and Prevention
This section outlines immediate steps to take and long-term security practices to mitigate the risk of exploitation.
Immediate Steps to Take
Users should apply an automatic update to a newer version of Bitdefender Endpoint Security Tools for Windows, which contains a fix for this vulnerability.
Long-Term Security Practices
In addition to updating affected software, organizations should implement robust security practices, conduct regular security audits, and educate users on best security practices.
Patching and Updates
Regularly apply security patches and updates from Bitdefender to safeguard against known vulnerabilities and ensure the security of the system.