CVE-2023-38005: IBM Cloud Pak System Auth Bypass Flaw

CVE-2023-38005 Overview

IBM Cloud Pak System versions 2.3.3.6, 2.3.3.7, 2.3.4.0, 2.3.4.1, and 2.3.5.0 contain an improper access control vulnerability (CWE-284) that could allow an authenticated user to perform unauthorized tasks. This broken access control issue enables users with legitimate credentials to execute actions beyond their intended privilege level.

Critical Impact
Authenticated users can bypass access controls to perform unauthorized administrative or privileged tasks within IBM Cloud Pak System environments, potentially compromising system integrity.

Affected Products

IBM Cloud Pak System 2.3.3.6
IBM Cloud Pak System 2.3.3.7
IBM Cloud Pak System 2.3.4.0
IBM Cloud Pak System 2.3.4.1
IBM Cloud Pak System 2.3.5.0

Discovery Timeline

2026-02-17 - CVE-2023-38005 published to NVD
2026-02-18 - Last updated in NVD database

Technical Details for CVE-2023-38005

Vulnerability Analysis

This vulnerability stems from improper access control mechanisms within IBM Cloud Pak System. The flaw allows authenticated users to exceed their assigned permissions and execute tasks that should be restricted to higher-privileged accounts. The network-accessible nature of the vulnerability means that any authenticated user with network access to the IBM Cloud Pak System can potentially exploit this weakness.

The impact is primarily on system integrity, as attackers could modify configurations, data, or system state without proper authorization. While the vulnerability requires authentication (ruling out anonymous exploitation), it presents a significant risk in multi-tenant or shared environments where different users should have segregated access levels.

Root Cause

The root cause is classified under CWE-284 (Improper Access Control), indicating that the application fails to properly restrict or enforce access permissions. This typically occurs when authorization checks are missing, incomplete, or incorrectly implemented in the application's access control logic. In the context of IBM Cloud Pak System, the access control mechanisms do not adequately verify whether an authenticated user has the appropriate permissions before allowing certain operations to proceed.

Attack Vector

The attack vector is network-based and requires an authenticated session. An attacker must first obtain valid credentials (either through legitimate access, social engineering, or credential theft) to exploit this vulnerability. Once authenticated, the attacker can leverage the improper access controls to perform tasks that exceed their intended authorization level.

The attack requires no user interaction and has low complexity, meaning that once an attacker has authenticated access, exploitation is straightforward. The scope is unchanged, indicating the vulnerability impacts only the vulnerable component itself without crossing security boundaries.

The exploitation flow typically involves:

Authenticating to IBM Cloud Pak System with valid but low-privilege credentials
Identifying administrative or restricted functionality that lacks proper authorization checks
Directly accessing or invoking these restricted functions to perform unauthorized operations

Detection Methods for CVE-2023-38005

Indicators of Compromise

Unusual administrative actions performed by non-administrative user accounts
Unexpected modifications to system configurations by standard users
Audit logs showing privilege escalation patterns or unauthorized task execution
Access to restricted API endpoints or management interfaces from unexpected user accounts

Detection Strategies

Enable comprehensive audit logging for all user actions within IBM Cloud Pak System
Implement behavioral analytics to detect users performing actions outside their normal role patterns
Monitor for access attempts to administrative functions from non-administrator accounts
Deploy SentinelOne Singularity to detect anomalous process behaviors and unauthorized system modifications

Monitoring Recommendations

Review IBM Cloud Pak System access logs regularly for authorization bypass attempts
Configure SIEM alerts for privilege escalation indicators and unusual access patterns
Implement role-based access monitoring to track deviations from expected user behavior
Monitor network traffic to IBM Cloud Pak System management interfaces for suspicious activity

How to Mitigate CVE-2023-38005

Immediate Actions Required

Review and update IBM Cloud Pak System to a patched version as recommended by IBM
Audit all user accounts and ensure proper role-based access control assignments
Enable enhanced logging and monitoring for the affected IBM Cloud Pak System instances
Implement network segmentation to limit access to management interfaces

Patch Information

IBM has released security guidance for this vulnerability. Organizations should consult the IBM Support Page Advisory for detailed patch information and upgrade instructions. Apply the recommended updates to all affected IBM Cloud Pak System versions (2.3.3.6, 2.3.3.7, 2.3.4.0, 2.3.4.1, and 2.3.5.0).

Workarounds

Implement strict network access controls to limit who can reach IBM Cloud Pak System
Review and minimize user privileges following the principle of least privilege
Deploy additional authentication layers such as multi-factor authentication for administrative access
Consider implementing a web application firewall (WAF) to monitor and filter requests to the platform

bash

# Review current user role assignments in IBM Cloud Pak System
# Ensure least privilege principle is applied to all accounts
# Restrict administrative access to essential personnel only
# Enable audit logging for all management operations