CVE-2021-23895 : What You Need to Know

McAfee Database Security (DBSec) prior to version 4.8.2 is affected by a deserialization vulnerability that allows a remote authenticated attacker to execute code on the DBSec server. Here's what you need to know about CVE-2021-23895.

Understanding CVE-2021-23895

This section provides insights into the nature and impact of CVE-2021-23895.

What is CVE-2021-23895?

The CVE-2021-23895 vulnerability involves the deserialization of untrusted data in McAfee Database Security (DBSec) before version 4.8.2. This flaw enables a remote authenticated attacker to create a reverse shell with administrator privileges on the DBSec server by sending a carefully crafted Java serialized object.

The Impact of CVE-2021-23895

With a CVSS base score of 9.0 and a critical severity level, this vulnerability poses a high risk to confidentiality, integrity, and availability. An attacker could exploit this flaw to gain unauthorized access and control over the affected DBSec server.

Technical Details of CVE-2021-23895

This section explores the technical aspects of CVE-2021-23895.

Vulnerability Description

The vulnerability stems from the inadequate handling of deserialization in McAfee DBSec, leading to the execution of arbitrary code by a malicious actor.

Affected Systems and Versions

McAfee Database Security (DBSec) versions prior to 4.8.2 are vulnerable to this exploit.

Exploitation Mechanism

By sending a specifically crafted Java serialized object, a remote authenticated attacker can trigger the deserialization flaw and execute arbitrary commands on the target server.

Mitigation and Prevention

Protecting your systems from CVE-2021-23895 requires immediate action and long-term security measures.

Immediate Steps to Take

Update McAfee DBSec to version 4.8.2 or above to patch the vulnerability.
Monitor network traffic for any suspicious activities targeting the DBSec server.

Long-Term Security Practices

Regularly apply security updates and patches to all software and systems.
Implement network segmentation and access controls to limit exposure to potential attacks.

Patching and Updates

Stay informed about security advisories and updates from McAfee to address any future vulnerabilities efficiently.