CVE-2020-4928 : Security Advisory and Response

IBM Cloud Pak System 2.3 could allow a local privileged attacker to upload arbitrary files, potentially leading to arbitrary code execution.

Understanding CVE-2020-4928

IBM Cloud Pak System 2.3 vulnerability allowing local privileged attackers to upload arbitrary files.

What is CVE-2020-4928?

IBM Cloud Pak System 2.3 is susceptible to a security flaw that enables a local attacker to upload arbitrary files, potentially leading to the execution of arbitrary code on the server.

The Impact of CVE-2020-4928

CVSS Base Score: 6.7 (Medium Severity)
Confidentiality Impact: High
Integrity Impact: High
Availability Impact: High
The vulnerability could be exploited by a local privileged attacker to compromise the system's confidentiality, integrity, and availability.

Technical Details of CVE-2020-4928

The technical aspects of the vulnerability in IBM Cloud Pak System 2.3.

Vulnerability Description

The flaw allows a local attacker to upload arbitrary files.
By intercepting and modifying file extensions, the attacker can execute arbitrary code on the server.

Affected Systems and Versions

Affected Product: Cloud Pak System
Vendor: IBM
Affected Version: 2.3

Exploitation Mechanism

Attack Complexity: Low
Attack Vector: Local
Privileges Required: High
Exploit Code Maturity: Unproven
The attacker needs high privileges to exploit the vulnerability.

Mitigation and Prevention

Measures to mitigate and prevent exploitation of CVE-2020-4928.

Immediate Steps to Take

Apply the official fix provided by IBM to address the vulnerability.
Monitor for any unauthorized file uploads or suspicious activities on the system.

Long-Term Security Practices

Implement the principle of least privilege to restrict user access.
Regularly update and patch the system to prevent known vulnerabilities.

Patching and Updates

Ensure the Cloud Pak System is updated with the latest security patches and fixes.