CVE-2021-2135 : What You Need to Know

A critical vulnerability has been identified in Oracle WebLogic Server, allowing an unauthenticated attacker to compromise the server with network access. This article delves into the details of CVE-2021-2135 and provides insights into its impact, technical details, and mitigation strategies.

Understanding CVE-2021-2135

Oracle WebLogic Server, a component of Oracle Fusion Middleware, is susceptible to a severe exploit due to a Coherence Container component vulnerability. The affected versions include 12.2.1.3.0, 12.2.1.4.0, and 14.1.1.0.0.

What is CVE-2021-2135?

The vulnerability in Oracle WebLogic Server allows an unauthenticated attacker with network access through T3 or IIOP to compromise the server. Successful exploitation could lead to a complete takeover of the Oracle WebLogic Server with a CVSS 3.1 Base Score of 9.8.

The Impact of CVE-2021-2135

The impact of this vulnerability is rated as critical, with high confidentiality, integrity, and availability impacts. This exploit can result in a complete compromise of the Oracle WebLogic Server, posing a significant security risk.

Technical Details of CVE-2021-2135

Vulnerability Description

The vulnerability allows unauthenticated attackers to compromise the Oracle WebLogic Server through T3 or IIOP network access, potentially leading to complete server takeover.

Affected Systems and Versions

Oracle WebLogic Server versions 12.2.1.3.0, 12.2.1.4.0, and 14.1.1.0.0 are confirmed to be affected by this exploit.

Exploitation Mechanism

Attackers can exploit this vulnerability by leveraging network access via T3 or IIOP to compromise the Oracle WebLogic Server, gaining unauthorized control.

Mitigation and Prevention

Immediate Steps to Take

System administrators are advised to apply security patches and updates released by Oracle promptly to mitigate the risk of exploitation.

Long-Term Security Practices

Implementing robust security measures, including access controls, network segmentation, and security monitoring, can help prevent unauthorized access and compromises.

Patching and Updates

Regularly monitor for security updates and patches from Oracle for Oracle WebLogic Server to address known vulnerabilities and enhance system security.