CVE-2025-30704
📋 TL;DR
A vulnerability in Oracle MySQL Server's Components Services allows high-privileged attackers with network access to cause a denial of service by crashing or hanging the server. This affects MySQL versions 8.0.0-8.0.41, 8.4.0-8.4.4, and 9.0.0-9.2.0. The attack is difficult to exploit and requires administrative database credentials.
💻 Affected Systems
- Oracle MySQL Server
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete unavailability of MySQL database service, disrupting all dependent applications and causing business downtime.
Likely Case
Intermittent service disruptions or performance degradation if an attacker with valid high privileges attempts exploitation.
If Mitigated
Minimal impact if proper access controls limit high-privileged accounts and network exposure.
🎯 Exploit Status
Exploitation requires high-privileged credentials and specific conditions. No public exploit code available as of advisory date.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apply patches from Oracle Critical Patch Update April 2025. Specific fixed versions: 8.0.42+, 8.4.5+, 9.2.1+
Vendor Advisory: https://www.oracle.com/security-alerts/cpuapr2025.html
Restart Required: Yes
Instructions:
1. Download appropriate MySQL patch from Oracle Support. 2. Stop MySQL service. 3. Apply patch according to Oracle documentation. 4. Restart MySQL service. 5. Verify version update.
🔧 Temporary Workarounds
Restrict High-Privileged Access
allLimit network access and reduce number of accounts with administrative privileges to MySQL server.
# Review and revoke unnecessary privileges
REVOKE ALL PRIVILEGES ON *.* FROM 'admin_user'@'%';
# Restrict login to specific hosts
GRANT ALL PRIVILEGES ON *.* TO 'admin_user'@'192.168.1.%';
Network Segmentation
linuxIsolate MySQL servers from untrusted networks and implement firewall rules.
# Example iptables rule to restrict MySQL port
sudo iptables -A INPUT -p tcp --dport 3306 -s trusted_network -j ACCEPT
sudo iptables -A INPUT -p tcp --dport 3306 -j DROP
🧯 If You Can't Patch
- Implement strict access controls for high-privileged MySQL accounts and monitor for unusual activity.
- Deploy network-based intrusion detection to monitor for exploitation attempts and implement rate limiting.
🔍 How to Verify
Check if Vulnerable:
Check MySQL version: SELECT VERSION(); If version falls within affected ranges (8.0.0-8.0.41, 8.4.0-8.4.4, 9.0.0-9.2.0), system is vulnerable.Check Version:
mysql -u root -p -e 'SELECT VERSION();'Verify Fix Applied:
After patching, verify version is 8.0.42+, 8.4.5+, or 9.2.1+ using SELECT VERSION();📡 Detection & Monitoring
Log Indicators:
- Unexpected MySQL service crashes or hangs in error logs
- Multiple failed connection attempts from single source followed by crash
- Error messages related to Components Services component
Network Indicators:
- Unusual traffic patterns to MySQL port 3306 from unauthorized sources
- Multiple protocol connection attempts from single IP
SIEM Query:
source="mysql_error.log" ("crash" OR "hang" OR "segmentation fault") AND "Components Services"