CVE-2021-20378 : Security Advisory and Response

IBM Guardium Data Encryption (GDE) versions 3.0.0.2 and 4.0.0.4 are affected by a vulnerability that allows an authenticated user to impersonate another user due to session invalidation issues.

Understanding CVE-2021-20378

This CVE refers to the vulnerability in IBM Guardium Data Encryption versions 3.0.0.2 and 4.0.0.4 that enables an authenticated user to impersonate another user.

What is CVE-2021-20378?

IBM Guardium Data Encryption versions 3.0.0.2 and 4.0.0.4 fail to invalidate sessions after logout, potentially leading to an authenticated user being able to impersonate another user on the system. This vulnerability has been identified as IBM X-Force ID: 195709.

The Impact of CVE-2021-20378

The impact of this vulnerability is considered medium with a CVSSv3 base score of 6.3 out of 10. An attacker with low privileges can exploit this issue remotely over a network, compromising confidentiality and integrity.

Technical Details of CVE-2021-20378

The following technical details provide more insight into the CVE-2021-20378 vulnerability.

Vulnerability Description

The vulnerability arises from the failure of IBM Guardium Data Encryption to invalidate sessions after user logout, enabling an authenticated user to impersonate another user on the system.

Affected Systems and Versions

IBM Guardium Data Encryption versions 3.0.0.2 and 4.0.0.4 are affected by this vulnerability.

Exploitation Mechanism

The attack complexity is low, and no user interaction is required, making it easier for an attacker to exploit this vulnerability amidst low privileges.

Mitigation and Prevention

To mitigate and prevent the risks associated with CVE-2021-20378, consider the following steps.

Immediate Steps to Take

IBM users are advised to apply the official fix provided by IBM to address this vulnerability promptly.

Long-Term Security Practices

Regularly monitor for security updates and patches from IBM to ensure that your systems are protected from known vulnerabilities.

Patching and Updates

Stay informed about security bulletins and alerts from IBM regarding Guardium Data Encryption to apply patches as soon as they are available.