CVE-2025-53062
📋 TL;DR
This vulnerability in MySQL Server's InnoDB component allows authenticated high-privileged attackers to cause a denial of service by crashing or hanging the database server. It affects MySQL versions 8.0.0-8.0.43, 8.4.0-8.4.6, and 9.0.0-9.4.0. Attackers need network access and high database privileges to exploit this vulnerability.
💻 Affected Systems
- Oracle MySQL Server
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete database server outage leading to application downtime and service disruption
Likely Case
Targeted DoS attacks by malicious insiders or compromised high-privilege accounts causing service interruptions
If Mitigated
Minimal impact if proper access controls and network segmentation are implemented
🎯 Exploit Status
CVSS indicates 'easily exploitable' but requires high-privilege database access
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apply patches from Oracle's October 2025 Critical Patch Update
Vendor Advisory: https://www.oracle.com/security-alerts/cpuoct2025.html
Restart Required: Yes
Instructions:
1. Review Oracle's October 2025 Critical Patch Update advisory 2. Download and apply the appropriate patch for your MySQL version 3. Restart MySQL service 4. Verify the patch was applied successfully
🔧 Temporary Workarounds
Restrict high-privilege access
allLimit accounts with administrative privileges to reduce attack surface
REVOKE SUPER, PROCESS, SHUTDOWN FROM non-essential_users@'%';
FLUSH PRIVILEGES;
Network segmentation
linuxRestrict network access to MySQL servers to only trusted sources
iptables -A INPUT -p tcp --dport 3306 -s trusted_ip -j ACCEPT
iptables -A INPUT -p tcp --dport 3306 -j DROP
🧯 If You Can't Patch
- Implement strict access controls to limit high-privilege database accounts
- Monitor for unusual database connection patterns and privilege escalation attempts
🔍 How to Verify
Check if Vulnerable:
Check MySQL version: SELECT VERSION(); and compare against affected rangesCheck Version:
mysql -e "SELECT VERSION();"Verify Fix Applied:
Verify version is above affected ranges and check Oracle patch documentation📡 Detection & Monitoring
Log Indicators:
- Unexpected database crashes or restarts
- Multiple connection attempts from single high-privilege accounts
- SHUTDOWN or KILL commands from unusual sources
Network Indicators:
- Multiple protocol connections to MySQL from single sources
- Unusual traffic patterns preceding database outages
SIEM Query:
source="mysql.log" ("shutdown" OR "crash" OR "restart") | stats count by src_ip, user