CVE-2025-30762
📋 TL;DR
This vulnerability in Oracle WebLogic Server allows unauthenticated attackers with network access via T3 or IIOP protocols to access sensitive data. It affects WebLogic Server versions 12.2.1.4.0, 14.1.1.0.0, and 14.1.2.0.0, potentially exposing confidential information stored on the server.
💻 Affected Systems
- Oracle WebLogic Server
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of all accessible data on the WebLogic Server, including sensitive application data, configuration files, and credentials.
Likely Case
Unauthorized access to confidential business data, customer information, or internal system details exposed through the WebLogic Server.
If Mitigated
Limited data exposure if proper network segmentation and access controls prevent unauthorized T3/IIOP connections.
🎯 Exploit Status
CVSS describes as 'easily exploitable' with network access via T3/IIOP protocols.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apply patches from Oracle Critical Patch Update July 2025
Vendor Advisory: https://www.oracle.com/security-alerts/cpujul2025.html
Restart Required: Yes
Instructions:
1. Download appropriate patches from Oracle Support. 2. Apply patches following Oracle's patch installation procedures. 3. Restart WebLogic Server instances. 4. Verify patch application.
🔧 Temporary Workarounds
Block T3/IIOP Protocols
allRestrict network access to T3 and IIOP protocols using firewall rules or WebLogic configuration.
# Firewall example: iptables -A INPUT -p tcp --dport 7001 -j DROP # Block default T3 port
# WebLogic: Configure network channels to disable T3/IIOP
Enable Authentication
allConfigure WebLogic to require authentication for T3 and IIOP connections.
# In WebLogic console: Security -> Realms -> myrealm -> Providers -> Authentication -> Configure T3/IIOP authentication
🧯 If You Can't Patch
- Implement strict network segmentation to isolate WebLogic servers and block T3/IIOP traffic from untrusted networks.
- Deploy web application firewall (WAF) or intrusion prevention system (IPS) with rules to detect and block exploitation attempts.
🔍 How to Verify
Check if Vulnerable:
Check WebLogic version using console or command line; verify if version matches affected list.Check Version:
java weblogic.versionVerify Fix Applied:
Verify patch application through WebLogic console or by checking version after patching.📡 Detection & Monitoring
Log Indicators:
- Unusual T3 or IIOP connection attempts from unauthorized sources
- Access patterns indicating data extraction
Network Indicators:
- Unusual T3/IIOP traffic patterns
- Connection attempts to WebLogic ports from unexpected sources
SIEM Query:
source="weblogic" AND (protocol="T3" OR protocol="IIOP") AND src_ip NOT IN [allowed_ips]