CVE-2021-41558 : Security Advisory and Response

The set_user extension module before 3.0.0 for PostgreSQL allows ProcessUtility_hook bypass via set_config.

Understanding CVE-2021-41558

The CVE-2021-41558 vulnerability refers to a security issue in the set_user extension module in PostgreSQL that can be exploited via set_config.

What is CVE-2021-41558?

The vulnerability in the set_user extension module before version 3.0.0 of PostgreSQL allows attackers to bypass ProcessUtility_hook through the set_config function.

The Impact of CVE-2021-41558

This vulnerability could be exploited by malicious actors to bypass security mechanisms, potentially leading to unauthorized access or other security breaches.

Technical Details of CVE-2021-41558

The technical aspects of CVE-2021-41558 provide insight into the specific details of the vulnerability and its impact.

Vulnerability Description

The set_user extension module prior to version 3.0.0 of PostgreSQL is susceptible to ProcessUtility_hook bypass through the set_config function, enabling unauthorized actions.

Affected Systems and Versions

Affected Product: PostgreSQL
Affected Version: <3.0.0

Exploitation Mechanism

The vulnerability can be exploited by leveraging the set_config function within the set_user extension module, allowing attackers to circumvent security controls.

Mitigation and Prevention

It is crucial to understand how to mitigate and prevent the exploitation of CVE-2021-41558.

Immediate Steps to Take

Users should update PostgreSQL to version 3.0.0 or newer to address this vulnerability.
Monitor for any unauthorized activities or access attempts on PostgreSQL instances.

Long-Term Security Practices

Regularly update software to the latest versions to patch known security vulnerabilities.
Implement least privilege access controls to limit potential attack surfaces.

Patching and Updates

Apply security patches promptly to address CVE-2021-41558 and other potential vulnerabilities in PostgreSQL.