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CVE-2020-4450 is a remote code execution vulnerability affecting IBM WebSphere Application Server traditional 8.5 and 9.0. The flaw can be triggered by a specially crafted sequence of serialized objects, indicating unsafe deserialization of untrusted data within the application server. A remote attacker able to deliver the malicious serialized object stream to a vulnerable WebSphere component can cause arbitrary code execution on the target system.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository provides a proof-of-concept exploit for IBM WebSphere Application Server vulnerabilities CVE-2020-4464 and CVE-2020-4450, leveraging Java deserialization and RMI (Remote Method Invocation) to achieve remote code execution. The structure includes Java source files (RMIServer.java and Test.java), a WSDL file (poc.wsdl) used to craft the malicious payload, and build scripts. The exploit works by setting up an attacker-controlled RMI registry (RMIServer.java) that references a malicious WSDL file served over HTTP. The Test.java file creates a serialized Java object (payload.ser) containing a gadget chain that, when deserialized by a vulnerable WebSphere instance, results in the execution of arbitrary commands (demonstrated with a reverse shell). The README provides detailed build and usage instructions, including required dependencies from a WebSphere installation. The attack vector is network-based, requiring the target to connect to attacker-controlled RMI and HTTP endpoints. No detection scripts are present; the code is a functional exploit.
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2 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.
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