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 220.127.116.11.0
- Weblogic server 18.104.22.168.0
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.
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