CVE-2021-20423 : Security Advisory and Response

IBM Cloud Pak for Applications 4.3 allows an authenticated user to gain escalated privileges due to improper application permissions.

Understanding CVE-2021-20423

This CVE, published on July 12, 2021, discloses a high-severity vulnerability in IBM Cloud Pak for Applications version 4.3.

What is CVE-2021-20423?

CVE-2021-20423 highlights a security issue in IBM Cloud Pak for Applications 4.3 that enables a logged-in user to elevate their privileges beyond what is intended due to incorrect application permissions.

The Impact of CVE-2021-20423

The vulnerability poses a significant risk as it allows an authenticated attacker to gain higher privileges within the system, potentially leading to unauthorized access and control.

Technical Details of CVE-2021-20423

The CVSS v3.0 score for this CVE is 8.8 (High), with a Temporal Score of 7.7 (High). Here are the key technical details:

Vulnerability Description

The vulnerability occurs due to improper permission settings in IBM Cloud Pak for Applications version 4.3, allowing authenticated users to escalate their privileges.

Affected Systems and Versions

Only IBM Cloud Pak for Applications version 4.3 is impacted by this vulnerability. Users of this specific version should take immediate action.

Exploitation Mechanism

The exploit mechanism involves an authenticated user manipulating application permissions to gain unauthorized access and elevated privileges within the system.

Mitigation and Prevention

As a security measure, it is crucial to address this vulnerability promptly to prevent any potential security breaches and unauthorized access.

Immediate Steps to Take

Affected users should apply the official fix provided by IBM to mitigate this vulnerability and prevent any unauthorized privilege escalation.

Long-Term Security Practices

Regularly review and update application permissions, conduct security audits, and monitor user activities to prevent similar privilege escalation issues in the future.

Patching and Updates

Stay informed about security updates from IBM regarding Cloud Pak for Applications and apply patches as soon as they are released to maintain a secure environment.