Overview
On October 21, 2020, Beijing time, Oracle released Critical Patch Update (CPU) for October 2020 that fixes 402 vulnerabilities of different risk levels.
The WebLogic Server Core component is prone to three severe vulnerabilities with a CVSS base score of 9.8, which are assigned CVE-2020-14841, CVE-2020-14825, and CVE-2020-14859 respectively.
These vulnerabilities are related to T3 and IIOP protocols and allow unauthenticated attackers to execute code remotely via the Internet. T3 and IIOP protocols are used to transmit data between WebLogic and other Java programs. The default WebLogic installation automatically enables the console, which, in turn, enables the T3 protocol by default. IIOP allows access to remote objects in the form of Java interfaces, which is enabled by default. Reference link:
Affected Versions
- CVE-2020-14841
- WebLogic server 10.3.6.0.0, 12.1.3.0.0, 12.2.1.3.0, 12.2.1.4.0, 14.1.1.0.0
- CVE-2020-14825
- WebLogic server 12.2.1.3.0, 12.2.1.4.0, 14.1.1.0.0
- CVE-2020-14859
- WebLogic server 10.3.6.0.0, 12.1.3.0.0, 12.2.1.3.0, 12.2.1.4.0, 14.1.1.0.0
Solution
Oracle has released patches to fix these vulnerabilities. Affected users should visit the official security advisory link to download related patches as soon as possible and apply them as indicated in the readme file to ensure long-term effective protection.
Note: Official patches of Oracle can be downloaded only by those with a licensed account of the software. Such users can use that account to log in to https://support.oracle.com to obtain the latest patches.
Mitigation:
If users cannot install the latest patches for the time being, they can disable the T3 and IIOP protocols to protect against the vulnerabilities:
For more information, see Oracle’s official security advisory at the following link:
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, Inc., a global network and cyber security leader, protects enterprises and carriers from advanced cyber attacks. The company’s Intelligent Hybrid Security strategy utilizes both cloud and on-premises security platforms, built on a foundation of real-time global threat intelligence, to provide multi-layered, unified and dynamic protection against advanced cyber attacks.
NSFOCUS works with Fortune Global 500 companies, including four of the world’s five largest financial institutions, organizations in insurance, retail, healthcare, critical infrastructure industries as well as government agencies. NSFOCUS has technology and channel partners in more than 60 countries, is a member of both the Microsoft Active Protections Program (MAPP), and the Cloud Security Alliance (CSA).
A wholly owned subsidiary of NSFOCUS Technologies Group Co., Ltd., the company has operations in the Americas, Europe, the Middle East and Asia Pacific.
