CVE-2019-4101 Explained : Impact and Mitigation

A vulnerability has been identified in IBM DB2 for Linux, UNIX and Windows versions 10.1, 10.5, and 11.1, allowing users to crash the instance.

Understanding CVE-2019-4101

This CVE involves a denial of service vulnerability in IBM DB2 for Linux, UNIX, and Windows versions 10.1, 10.5, and 11.1.

What is CVE-2019-4101?

The vulnerability allows users with specific privileges to intentionally crash the DB2 instance.

The Impact of CVE-2019-4101

CVSS Score: 6.2 (Medium Severity)
Attack Vector: Local
Availability Impact: High
Exploit Code Maturity: Unproven
Affected Systems: DB2 for Linux, UNIX, and Windows versions 10.1, 10.5, and 11.1

Technical Details of CVE-2019-4101

This section provides detailed technical information about the vulnerability.

Vulnerability Description

Users with EXECUTE privileges on PD_GET_DIAG_HIST and access to the diagnostic directory can crash the instance.

Affected Systems and Versions

IBM DB2 for Linux, UNIX, and Windows versions 10.1, 10.5, and 11.1

Exploitation Mechanism

Users exploit EXECUTE privileges on specific functions and access to the diagnostic directory to crash the instance.

Mitigation and Prevention

Protect your systems from CVE-2019-4101 with the following steps:

Immediate Steps to Take

Restrict access to the diagnostic directory
Apply official fixes provided by IBM

Long-Term Security Practices

Regularly review and update user privileges
Monitor and restrict access to critical functions

Patching and Updates

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