CVE-2025-30751
📋 TL;DR
This vulnerability in Oracle Database allows attackers with low privileges (Create Session and Create Procedure) to gain complete control over the database via network access. It affects Oracle Database Server versions 19.27 and 23.4-23.8, potentially leading to data theft, manipulation, and service disruption.
💻 Affected Systems
- Oracle Database Server
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to data exfiltration, destruction, ransomware deployment, and persistent backdoor access.
Likely Case
Privilege escalation to DBA/SYSDBA level, enabling data theft, manipulation, and lateral movement within the database environment.
If Mitigated
Limited impact if network access is restricted and least privilege principles are strictly enforced.
🎯 Exploit Status
Oracle describes as 'easily exploitable' with low attack complexity. Requires authenticated access with specific privileges.
🛠️ 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 patch from My Oracle Support. 2. Apply patch following Oracle's patch installation procedures. 3. Restart database instances. 4. Test application functionality.
🔧 Temporary Workarounds
Restrict network access
allLimit Oracle Net access to trusted IP addresses only
Use Oracle Net Manager or edit listener.ora to configure IP restrictions
Minimize privileges
allReview and remove Create Procedure privilege from non-essential accounts
REVOKE CREATE PROCEDURE FROM <username>;
REVOKE CREATE ANY PROCEDURE FROM <username>;
🧯 If You Can't Patch
- Implement strict network segmentation and firewall rules to limit database access
- Apply principle of least privilege and audit all accounts with Create Procedure privilege
🔍 How to Verify
Check if Vulnerable:
Check Oracle Database version: SELECT * FROM v$version; If version is 19.27 or between 23.4-23.8, system is vulnerable.Check Version:
SELECT banner FROM v$version WHERE banner LIKE 'Oracle Database%';Verify Fix Applied:
Verify patch application: SELECT * FROM dba_registry_history WHERE action_time > [patch date]; Check version is no longer in vulnerable range.📡 Detection & Monitoring
Log Indicators:
- Unusual CREATE PROCEDURE statements from low-privilege accounts
- Suspicious privilege escalation attempts in audit logs
Network Indicators:
- Unexpected Oracle Net connections to database from unauthorized sources
SIEM Query:
source="oracle_audit" AND (event="CREATE PROCEDURE" OR event="GRANT") AND user_privilege_level="LOW"