Weblogic High Risk Vulnerability Threat Alert

Weblogic High Risk Vulnerability Threat Alert

November 1, 2019 | Mina Hao

Overview

Recently, Oracle fixed two high-risk vulnerabilities in Weblogic (CVE-2019-2890 and CVE-2019-2891)  in its October critical patch update.

References:

https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html

Vulnerability Description

  • CVE-2019-2890

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.

  • CVE-2019-2891

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.

Affected Versions

  • Weblogic server 10.3.6.0.0
  • Weblogic server 12.1.3.0.0
  • Weblogic server 12.2.1.3.0

Security Recommendations

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.

References:

https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html

Statement

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