✅ Report Title: Oracle WebLogic Vulnerability Report: CVE-2017-10271
✅ Executive Summary
- On October 19, 2017, Oracle released an emergency patch addressing the WebLogic vulnerability CVE-2017-10271.
- The vulnerability was confirmed to affect the following product versions:
- Oracle WebLogic < 10.3.6.0.0
- Oracle WebLogic < 12.1.3.0.0
- Oracle WebLogic < 12.2.1.1.0
- Oracle WebLogic < 12.2.1.2.0
- The issue was published with a CVSS v3.1 score of 7.5 (High).
- As multiple threat actors have continued to actively exploit this vulnerability in recent years, immediate remediation is strongly recommended.
📌 What caused the vulnerability?
- This is a remote code execution (RCE) vulnerability caused by unsafe deserialization within Oracle WebLogic.
- Specifically, it originates from insecure deserialization in the WSAT (Web Services Atomic Transaction) endpoint of WebLogic Server.
- Attackers exploit this by leveraging the T3 protocol to send malicious XML requests to the CoordinatorPortType web service.
- The flaw occurs in the WorkContextXmlInputAdapter class within the WLS Security component.
- When processing serialized XML data, the XMLDecoder deserializes attacker-supplied Java objects (e.g., java.lang.Class) without proper validation.
- As a result, a remote attacker can achieve arbitrary code execution on the affected system.
📌 What is the attack scenario?
- Attackers conduct mass scanning across IP ranges, targeting the default WebLogic port 7001.
- They determine whether the responding server is running a vulnerable version.
- Malicious serialized payloads are delivered to exploit the vulnerability.
- Successful exploitation enables attackers to install a web shell or similar files, ensuring persistence.
✅ Recommended Threat Detection and Mitigation Actions:
- Monitor traffic to T3 protocol ports/services for abnormal data patterns.
- Deploy detection rules to identify XML payloads containing known malicious patterns.
- Flag and investigate execution attempts that deviate from normal WebLogic behavior.
- Apply the latest security updates and patches immediately.
- Continuously update threat detection rules and conduct proactive monitoring.
- If patching is not immediately possible:
- Consider disabling the CoordinatorPortType component if it is not in use.
(Note: Proof-of-Concept (PoC) and exploit code for this vulnerability are publicly available.)
Link: https://github.com/1337g/CVE-2017-10271/blob/master/CVE-2017-10271.py
🧑💻 Report Author: S2W TALON
👉 Contact us: https://s2w.inc/en/contact
*The full report is available upon request and for QUAXAR subscribers.