CVE-2021-3823 : Security Advisory and Response

A Path traversal vulnerability in Bitdefender GravityZone Update Server has been identified and assigned the CVE ID CVE-2021-3823.

Understanding CVE-2021-3823

This section will cover what CVE-2021-3823 is and its impact, technical details, and mitigation strategies.

What is CVE-2021-3823?

CVE-2021-3823 refers to an Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in the UpdateServer component of Bitdefender GravityZone. This vulnerability allows attackers to execute arbitrary code on vulnerable instances.

The Impact of CVE-2021-3823

The impact of CVE-2021-3823 is rated as HIGH, with a CVSS v3.1 base score of 7.1. It affects Bitdefender GravityZone versions prior to 3.3.8.249. The confidentiality impact is high, and no user interaction is required for exploitation.

Technical Details of CVE-2021-3823

This section will delve into the vulnerability description, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

The vulnerability allows attackers to perform a Path Traversal attack, leading to the execution of arbitrary code on affected systems.

Affected Systems and Versions

Bitdefender GravityZone versions prior to 3.3.8.249 are affected by CVE-2021-3823.

Exploitation Mechanism

Attackers can exploit this vulnerability locally with low attack complexity, requiring no user privileges.

Mitigation and Prevention

Here we will discuss the immediate steps to take, long-term security practices, and the importance of patching and updates.

Immediate Steps to Take

Users are advised to update Bitdefender GravityZone Update Server to version 3.3.8.249 to mitigate the vulnerability.

Long-Term Security Practices

In addition to applying patches, organizations should implement robust security measures to prevent similar vulnerabilities in the future.

Patching and Updates

Regularly update software and systems to ensure they are protected against known vulnerabilities.