CVE-2025-50088
📋 TL;DR
This vulnerability in Oracle MySQL's InnoDB component allows authenticated high-privileged attackers to cause a denial of service (DoS) by crashing or hanging the MySQL server. It affects MySQL Server versions 8.0.0-8.0.41, 8.4.0-8.4.4, and 9.0.0-9.2.0. Attackers need network access and high privileges to exploit this vulnerability.
💻 Affected Systems
- Oracle MySQL Server
📦 What is this software?
Mysql by Oracle
Mysql by Oracle
Mysql by Oracle
⚠️ Risk & Real-World Impact
Worst Case
Complete unavailability of MySQL server leading to application downtime and service disruption.
Likely Case
Targeted DoS attacks against MySQL servers by malicious insiders or compromised high-privilege accounts.
If Mitigated
Limited impact due to proper access controls and network segmentation preventing unauthorized high-privilege access.
🎯 Exploit Status
Vulnerability is described as 'easily exploitable' but requires high-privilege access. No public exploit details available at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Oracle Critical Patch Update Advisory for July 2025 for specific fixed versions
Vendor Advisory: https://www.oracle.com/security-alerts/cpujul2025.html
Restart Required: Yes
Instructions:
1. Review Oracle Critical Patch Update Advisory for July 2025. 2. Identify appropriate patch for your MySQL version. 3. Apply patch following Oracle's recommended procedures. 4. Restart MySQL service to apply changes.
🔧 Temporary Workarounds
Restrict High-Privilege Access
allLimit accounts with administrative privileges to only trusted sources and implement strict access controls.
REVOKE SUPER, PROCESS, SHUTDOWN FROM 'user'@'%';
GRANT SUPER, PROCESS, SHUTDOWN TO 'user'@'trusted-ip';
Network Segmentation
linuxRestrict network access to MySQL servers to only authorized applications and administrators.
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 principle of least privilege for MySQL accounts
- Monitor for unusual connection patterns or repeated crash events
🔍 How to Verify
Check if Vulnerable:
Check MySQL version: SELECT VERSION(); and compare against affected ranges.Check Version:
mysql -e "SELECT VERSION();"Verify Fix Applied:
Verify version is outside affected ranges and check Oracle advisory for specific fixed versions.📡 Detection & Monitoring
Log Indicators:
- Unexpected MySQL crashes or hangs
- Repeated connection attempts from high-privilege accounts
- Error logs showing InnoDB component failures
Network Indicators:
- Multiple protocol connections to MySQL from unusual sources
- High volume of administrative queries
SIEM Query:
source="mysql.log" ("crash" OR "hang" OR "shutdown") AND ("InnoDB" OR "privileged")