Oracle on Tuesday announced that it has released emergency patches for a critical remote code execution vulnerability affecting WebLogic Server, a Java EE application server that is part of the company’s Fusion Middleware offering.
The security hole, tracked as CVE-2019-2729 with a CVSS score of 9.8, impacts WebLogic versions 10.3.6.0.0, 12.1.3.0.0 and 12.2.1.3.0. The flaw was independently reported to Oracle by nearly a dozen researchers.
According to Oracle, the vulnerability exists due to a deserialization issue related to XMLDecoder and it can be exploited remotely without authentication.
Oracle has advised users to apply the patches released now and install the latest Critical Patch Update (CPU).
In a short blog post, John Heimann, VP of Security Program Management at Oracle, pointed out that CVE-2019-2729 is different from CVE-2019-2725, despite the fact that both are deserialization issues.
The WebLogic vulnerability tracked as CVE-2019-2725 was patched by Oracle with an out-of-band update in April after the company learned of in-the-wild exploitation. The weakness has been exploited in many attacks aimed at enterprises, including ones whose goal was to deliver cryptocurrency miners and even a new piece of ransomware called Sodinokibi.
Knownsec 404 Team, which has been credited by Oracle for reporting CVE-2019-2729, says the latest WebLogic vulnerability is actually a result of the patch for CVE-2019-2725 being bypassed. Knownsec 404 Team says it’s aware of attacks exploiting CVE-2019-2729.
*Updated with information from Knownsec 404 Team
Related: Oracle WebLogic Server Flaw Exploited to Deliver Crypto-Miners
Related: Hackers Target Poorly Patched Oracle WebLogic Flaw
Related: Recently Patched Oracle WebLogic Flaw Exploited in the Wild
Eduard Kovacs (@EduardKovacs) is a contributing editor at SecurityWeek. He worked as a high school IT teacher for two years before starting a career in journalism as Softpedia’s security news reporter. Eduard holds a bachelor’s degree in industrial informatics and a master’s degree in computer techniques applied in electrical engineering.
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