CVE-2021-3100 : What You Need to Know

Apache Log4j hotpatch package before log4j-cve-2021-44228-hotpatch-1.1-13 didn’t mimic JVM permissions, enabling privilege escalation. This CVE has a CVSSv3.1 base score of 8.8.

Understanding CVE-2021-3100

This CVE addresses a vulnerability in the Apache Log4j hotpatch package that allows for privilege escalation due to incorrect permission handling.

What is CVE-2021-3100?

The CVE-2021-3100 vulnerability in the Log4j hot patch package allows an attacker to escalate privileges by exploiting improper permission handling in the package.

The Impact of CVE-2021-3100

The impact of this vulnerability is rated as HIGH due to the potential for privilege escalation, affecting confidentiality, integrity, and availability of the systems.

Technical Details of CVE-2021-3100

This section covers the specific technical aspects of the CVE.

Vulnerability Description

The vulnerability arises from the Log4j hot patch package not replicating JVM permissions accurately during patch application, enabling unauthorized privilege escalation.

Affected Systems and Versions

Amazon Web Services' log4j-cve-2021-44228-hotpatch version unspecified with versions less than 1.1-13 are affected by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability by leveraging the discrepancy in permission replication in the Log4j hot patch package to gain unauthorized escalated privileges.

Mitigation and Prevention

Preventive measures and actions to mitigate the risks associated with CVE-2021-3100.

Immediate Steps to Take

Users and administrators should update the affected Log4j hot patch package to version 1.1-13 or higher to remediate this privilege escalation vulnerability.

Long-Term Security Practices

Regularly monitor for security updates and patches for software dependencies to prevent security vulnerabilities like CVE-2021-3100.

Patching and Updates

Ensure timely application of security patches and updates to address known vulnerabilities and enhance the overall security posture of the systems.