Recently, Oracle fixed two high-risk vulnerabilities in Weblogic (CVE-2019-2890 and CVE-2019-2891) in its October critical patch update.
This vulnerability allows an attacker to bypass a Weblogic deserialization blacklist and take over the affected server by constructing a malicious T3 protocol request with certain permissions.
The vulnerability allows an attacker to take over an affected server by constructing a malicious HTTP request and sending it to the Console component without authorization.
- Weblogic server 10.3.6.0.0
- Weblogic server 184.108.40.206.0
- Weblogic server 220.127.116.11.0
Oracle has released a patch to fix the two vulnerabilities above, and the affected users should upgrade as soon as possible for protection.
If the user does not apply T3 protocol for communication, T3 protocol can be disabled for temporary protection.
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.
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 Information Technology Co. Ltd., the company has operations in the Americas, Europe, the Middle East and Asia Pacific.