Critical Patch Update Notice in July for All Series of Oracle Products

Overview

On July 17, 2024, NSFOCUS CERT detected that Oracle officially released a critical patch update announcement CPU (Critical Patch Update) for July. A total of 397 vulnerabilities of varying degrees were fixed this time. This security update involves Oracle WebLogic Server, Oracle MySQL, Oracle Java SE, Oracle Fusion Middleware, Oracle Financial Services Applications, Oracle Communications Applications and other commonly used products. Oracle strongly recommends that customers apply critical patch updates to fix the vulnerability as soon as possible.

Reference link: https://www.oracle.com/security-alerts/cpujul2024.html

Key Vulnerabilities

Screen out the vulnerabilities with great impact in this update according to product popularity and vulnerability importance. Please pay attention to them:

Oracle WebLogic Server Remote Code Execution Vulnerability (CVE-2024-21181):

A remote execution vulnerability is present in Oracle WebLogic Server. An unauthenticated attacker executes arbitrary code on the targeted server by sending a special request via T3/IIOP protocol to the affected server, with a CVSS score of 9.8.

Oracle WebLogic Server Information Disclosure Vulnerability (CVE-2024-21182 / CVE-2024-21183):

An information disclosure vulnerability exists in Oracle WebLogic Server. An unauthenticated attacker sends a special request to the affected server through T3/IIOP protocol, which may realize illegal access to key data or complete access to all data of Oracle WebLogic Server, resulting in disclosure of sensitive information. The CVSS score was 7.5.

Oracle WebLogic Server Unauthorized Access Vulnerability (CVE-2024-21175):

An unauthorized access vulnerability exists in Oracle WebLogic Server. An unauthenticated attacker can create, delete or modify full access to critical data or all data of the Oracle WebLogic Server without authorization by sending a special HTTP request to an affected server. The CVSS score was 7.5.

The vulnerabilities in the key patch update of Oracle official website in July are summarized as follows:

Mitigation

1. Patch update

Please refer to the Appendix “Affected Products and Patch Information” in this document to download the affected product update patch in time, and install and update it by referring to the readme file in the patch installation package to ensure long-term effective protection. Note: The official patch of Oracle requires the user to have a licensed account of genuine software. After logging in https://support.oracle.com with this account, you can download the latest patch.

2. Temporary measures

Restrict T3 protocol access

The following measures can be used to block attacks that exploit T3 protocol vulnerabilities if the user is temporarily unable to install patches or communicate with the JVM via the T3 protocol:

WebLogic Server provides a default connection filter named weblogic.security.net.ConnectionFilterImpl, which accepts all incoming connections and can control access to T3 and T3s protocols through the configuration rules of this connection filter. The detailed operation steps are as follows:

1) Go to the Weblogic console. On the configuration page of base_domain, go to the Security tab page and click Filters to configure connection filters.

2) Enter weblogic.security.net.ConnectionFilterImpl in the connection filter, and configure rules that meet the actual situation of the enterprise in the connection filter rules by referring to the following writing:

3) If the rule does not take effect after saving, it is recommended to restart the Weblogic service (restarting the Weblogic service will cause business interruption. It is recommended that relevant personnel assess the risk before proceeding). Taking the Windows environment as an example, the steps to restart the service are as follows:

Enter the bin directory under the directory where the domain is located, run stopWebLogic.cmd file in Windows system to terminate weblogic service, and run stopWebLogic.sh file in Linux system

After the termination script is executed, run the startWebLogic.cmd or startWebLogic.sh file to start Weblogic to restart the Weblogic service.

Reference link: https://docs.oracle.com/cd/E24329_01/web.1211/e24485/con_filtr.htm#SCPRG377

Disable IIOP protocol

Users can block attacks that exploit IIOP protocol vulnerabilities by disabling the IIOP protocol as follows: In the Weblogic console, choose Service -> AdminServer -> Protocol and unselect Enable IIOP. Restart the Weblogic project to make the configuration take effect.

Affected Products and Patches

Statement

This advisory is only used to describe a potential risk. NSFOCUS does not provide any commitment or promise on this advisory. NSFOCUS and the author will not bear any liability for any direct and/or indirect consequences and losses caused by transmitting and/or using this advisory. NSFOCUS reserves all the rights to modify and interpret this advisory. Please include this statement paragraph when reproducing or transferring this advisory. Do not modify this advisory, add/delete any information to/from it, or use this advisory for commercial purposes without permission from NSFOCUS.

About NSFOCUS

NSFOCUS, a pioneering leader in cybersecurity, is dedicated to safeguarding telecommunications, Internet service providers, hosting providers, and enterprises from sophisticated cyberattacks.

Founded in 2000, NSFOCUS operates globally with over 4000 employees at two headquarters in Beijing, China, and Santa Clara, CA, USA, and over 50 offices worldwide. It has a proven track record of protecting over 25% of the Fortune Global 500 companies, including four of the five largest banks and six of the world’s top ten telecommunications companies.

Leveraging technical prowess and innovation, NSFOCUS delivers a comprehensive suite of security solutions, including the Intelligent Security Operations Platform (ISOP) for modern SOC, DDoS Protection, Continuous Threat Exposure Management (CTEM) Service and Web Application and API Protection (WAAP). All the solutions and services are augmented by the Security Large Language Model (SecLLM), ML, patented algorithms and other cutting-edge research achievements developed by NSFOCUS.