CVE-2025-33114 Overview
CVE-2025-33114 is a Denial of Service vulnerability affecting IBM Db2 for Linux versions 12.1.0, 12.1.1, and 12.1.2. The vulnerability allows remote attackers to cause service disruption through specially crafted queries when certain non-default configurations are in place. This network-accessible flaw can lead to availability impact on affected database systems without requiring authentication.
Critical Impact
Unauthenticated remote attackers can disrupt IBM Db2 database services through malicious queries, potentially causing system-wide availability issues for applications depending on the database.
Affected Products
- IBM Db2 for Linux 12.1.0
- IBM Db2 for Linux 12.1.1
- IBM Db2 for Linux 12.1.2
Discovery Timeline
- July 29, 2025 - CVE-2025-33114 published to NVD
- August 6, 2025 - Last updated in NVD database
Technical Details for CVE-2025-33114
Vulnerability Analysis
This vulnerability falls under CWE-943, which relates to improper neutralization of special elements in data query logic. IBM Db2 for Linux fails to properly handle certain specially crafted queries when specific non-default conditions are present in the database configuration. The flaw enables attackers to exploit query processing mechanisms to exhaust system resources or trigger unhandled exceptions that result in service disruption.
The attack can be executed remotely over the network without requiring user interaction or prior authentication. While the vulnerability does not compromise data confidentiality or integrity, it poses a significant threat to system availability, making it particularly dangerous for production database environments where uptime is critical.
Root Cause
The root cause stems from improper handling of special elements within data query logic (CWE-943). When non-default conditions are configured in IBM Db2, the query parser fails to adequately validate and sanitize certain input patterns. This allows malicious queries to bypass normal processing controls and trigger denial of service conditions.
Attack Vector
The vulnerability is exploitable over the network by sending specially crafted SQL queries to the IBM Db2 database server. The attack requires:
- Network access to the target IBM Db2 instance
- Knowledge of non-default configuration conditions that enable the vulnerability
- Ability to submit queries to the database (potentially through application interfaces)
The exploitation does not require authentication or special privileges, making it accessible to any attacker with network connectivity to the database port. The attack complexity is considered low, as the specially crafted query can be delivered through standard database communication protocols.
Detection Methods for CVE-2025-33114
Indicators of Compromise
- Unusual database query patterns featuring malformed or excessively complex query structures
- Unexpected IBM Db2 service crashes or restarts without apparent cause
- Performance degradation or resource exhaustion on database servers
- Spike in error logs related to query processing failures
Detection Strategies
- Monitor IBM Db2 diagnostic logs for unusual query parsing errors or exceptions
- Implement query analysis to detect anomalous patterns that deviate from normal application behavior
- Deploy network intrusion detection rules to identify suspicious database traffic patterns
- Establish baseline metrics for database resource utilization to identify denial of service attempts
Monitoring Recommendations
- Enable detailed IBM Db2 diagnostic logging to capture query execution failures
- Configure alerting for database service availability and response time degradation
- Monitor system resource utilization (CPU, memory, I/O) for abnormal patterns
- Review audit logs for failed or unusual query submissions from unexpected sources
How to Mitigate CVE-2025-33114
Immediate Actions Required
- Review IBM Db2 configurations to identify non-default settings that may enable this vulnerability
- Apply the security patch provided by IBM as soon as possible
- Restrict network access to IBM Db2 instances to trusted hosts and applications only
- Implement query validation and sanitization at the application layer
Patch Information
IBM has released a security advisory addressing this vulnerability. Administrators should apply the official patch from IBM to remediate CVE-2025-33114. The security update addresses the improper query handling that enables the denial of service condition.
For detailed patch information and download instructions, refer to the IBM Security Advisory.
Workarounds
- Review and revert any non-default configuration settings that may expose this vulnerability
- Implement network-level access controls to restrict database connectivity to authorized clients
- Deploy a web application firewall (WAF) or database firewall to filter potentially malicious queries
- Consider temporarily isolating affected database instances from untrusted networks until patching is complete
# Example: Restrict network access to IBM Db2 port using iptables
# Allow only trusted application servers to connect to Db2 (default port 50000)
iptables -A INPUT -p tcp --dport 50000 -s 10.0.1.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 50000 -j DROP
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
