IBM Db2 Security Vulnerability Assessment
Product: IBM Db2 Database Server
Platforms Affected: Linux, UNIX, Windows
Audience: Security teams, SOC, DBAs, Infrastructure teams
Risk Category: Privilege Escalation, Authorization Bypass, Local System Compromise
Executive Overview
Multiple security vulnerabilities were identified in IBM Db2 that could allow an authenticated or local attacker to bypass authorization controls or escalate privileges under specific conditions. These issues affect both cross-platform Db2 deployments and Windows-specific installations.
While no weaponized exploits are widely observed in the wild at this time, the vulnerabilities present realistic attack paths for insider threats, compromised credentials, or post-exploitation lateral movement. If exploited successfully, full system compromise could be achieved.
Immediate remediation through vendor-provided patches is strongly recommended.
Affected Vulnerabilities Summary
| Vulnerability Name | CVE ID | CVSS Score | Severity | Attack Type |
|---|---|---|---|---|
| Db2 Instance Owner Privilege Escalation | CVE-2025-36184 | 7.2 | High | Local Privilege Escalation |
| Db2 Authorization Bypass via Remote Storage Alias | CVE-2025-36365 | ~6.x | Medium | Authorization Bypass |
| Db2 Windows Unquoted Search Path | CVE-2025-36384 | 8.4 | High | Local Privilege Escalation |
CVE-2025-36184
Db2 Instance Owner Privilege Escalation
Vulnerability Description
A flaw exists in IBM Db2 where certain internal operations are executed with higher operating system privileges than required. Under specific circumstances, a Db2 instance owner account can trigger these operations in a way that results in code execution with elevated privileges.
The instance owner role is intended to manage Db2 processes but should not have unrestricted OS-level access. Due to this flaw, privilege boundaries between Db2 administrative roles and the underlying operating system may be bypassed.
Exploitation Scenario
- Access to a Db2 instance owner account is first obtained (through credential compromise, misconfiguration, or insider access).
- Db2 performs a privileged operation on behalf of the instance owner.
- Arbitrary code execution may occur under root (Linux/UNIX) or SYSTEM (Windows) context.
No publicly weaponized exploit has been confirmed. Proof-of-concept activity has only been discussed in academic and controlled security research contexts for educational purposes.
Security Impact
- Full operating system compromise
- Complete access to database contents
- Ability to disable security controls or persistence mechanisms
- Lateral movement to adjacent systems
MITRE Mapping
- ATT&CK Technique: Exploitation for Privilege Escalation
- CWE Category: Execution with Unnecessary Privileges (CWE-250)
Detection & Monitoring Guidance
Indicators of Exploitation
- Db2 processes spawning shells or OS utilities unexpectedly
- Privileged OS commands executed by Db2 instance owner accounts
- Creation of new system services or scheduled tasks originating from Db2 binaries
- Permission or ownership changes on Db2 binaries or configuration files
Recommended Log Sources
- Endpoint Detection & Response (process creation telemetry)
- Linux auditd / syslog
- Windows Security Event Logs (Event ID 4688)
- Db2 native audit logs
Example Detection Rules
Behavior-based Rule:
- Alert when a Db2 process (
db2sysc,db2start,db2agent) spawns:cmd.exepowershell.exe/bin/sh/bin/bash
- Especially when executed with elevated privileges
SIEM Correlation Idea:
- Parent process = Db2 binary
- Child process = shell or scripting engine
- Execution context = root or SYSTEM
Remediation
- Apply IBM-provided patch immediately
- Restrict instance owner role to minimal trusted users
- Enforce OS-level least privilege
- Monitor Db2 administrative activity continuously
Official Patch / Upgrade Link:
https://www.ibm.com/support/pages/node/7257519
CVE-2025-36365
Authorization Bypass via Cataloged Remote Storage Aliases
Vulnerability Description
Under a specific configuration involving cataloged remote storage aliases, IBM Db2 improperly validates user-controlled input. This flaw may allow an authenticated user to bypass authorization checks and perform operations outside their assigned role.
This vulnerability is configuration-dependent and does not affect all Db2 environments. However, systems using remote storage alias functionality are at increased risk.
Exploitation Scenario
- A legitimate Db2 user interacts with a remote storage alias
- A crafted user-controlled key is supplied
- Authorization checks are bypassed internally
- Restricted Db2 commands or operations are executed
This behavior has only been demonstrated in controlled testing environments for educational analysis.
Security Impact
- Unauthorized administrative actions
- Data integrity compromise
- Unauthorized schema or configuration modification
- Privilege escalation within Db2 context
MITRE Mapping
- ATT&CK Category: Privilege Escalation / Impact
- CWE Category: Authorization Bypass Through User-Controlled Key (CWE-639)
Detection & Monitoring Guidance
Indicators of Exploitation
- Administrative Db2 commands executed by non-admin users
- Unexpected modification of remote storage alias configurations
- DDL operations occurring outside approved change windows
- Sudden access to restricted schemas or tables
Recommended Log Sources
- Db2 audit logs
- Database activity monitoring (DAM)
- SIEM correlation of DB activity vs RBAC roles
Example Detection Rules
Db2 Audit Rule:
- Alert on
ALTER,CREATE,DROP, orCATALOGoperations - Triggered by users outside approved admin groups
Behavioral Rule:
- Spike in alias-related SQL operations from a previously low-activity account
Remediation
- Apply IBM security fix
- Review and restrict access to remote storage alias management
- Enforce change management for Db2 configuration updates
Official Patch / Upgrade Link:
https://www.ibm.com/support/pages/security-bulletin-ibm%C2%AE-db2%C2%AE-vulnerable-privilege-escalation-under-specific-configuration-cataloged-remote-storage-aliases-cve-2025-36365
CVE-2025-36384
Windows Unquoted Search Path Privilege Escalation
Vulnerability Description
IBM Db2 for Windows was found to use unquoted executable paths for certain services. When a service path contains spaces and is not enclosed in quotes, Windows may attempt to execute unintended binaries.
If a low-privileged user can write to a directory within the affected path, malicious executables may be executed with SYSTEM privileges.
Exploitation Scenario
- Local access to the system is obtained
- A malicious executable is placed in a writable directory within the service path
- Db2 service is restarted
- Malicious binary executes as SYSTEM
This technique is well-known and commonly leveraged during post-exploitation phases.
Security Impact
- Full SYSTEM-level compromise
- Persistence through service execution
- Credential harvesting or lateral movement
MITRE Mapping
- ATT&CK Technique: Path Interception by Unquoted Path
- CWE Category: Unquoted Search Path (CWE-428)
Detection & Monitoring Guidance
Indicators of Exploitation
- Executables created in parent directories of service paths
- Unexpected child processes spawned by
services.exe - Registry changes to service
ImagePathvalues
Recommended Log Sources
- Windows Security Event Logs (4688, 4657)
- EDR telemetry
- Windows Registry auditing
Example Detection Rules
Registry Rule:
- Detect service ImagePath entries containing spaces without quotation marks
Process Rule:
- Alert when
services.exelaunches a binary from an unexpected directory
Remediation
- Apply IBM Windows Db2 patch
- Quote all service executable paths
- Restrict write access to service directories
- Perform estate-wide unquoted path scanning
Official Patch / Upgrade Link:
https://www.ibm.com/support/pages/security-bulletin-ibm%C2%AE-db2%C2%AE-vulnerable-privilege-escalation-due-use-unquoted-search-path-element-cve-2025-36384
Final Takeaway
- No active exploitation has been confirmed in the wild.
- All exploitation discussion above is strictly educational and defensive.
- Patch application remains the most effective mitigation.
- Continuous monitoring is strongly advised for all Db2 environments.
