CVE-2019-10127 : Vulnerability Insights and Analysis

A security vulnerability has been discovered in versions 11.x of PostgreSQL prior to 11.3, allowing attackers to execute malicious code and bypass access restrictions.

Understanding CVE-2019-10127

This CVE identifies a security flaw in PostgreSQL versions 11.x prior to 11.3, impacting the ACL security of the binary installation and data directories in the Windows installer for BigSQL-supplied PostgreSQL.

What is CVE-2019-10127?

The vulnerability in PostgreSQL versions 11.x prior to 11.3 allows attackers with limited privileges to execute malicious code and access sensitive files, potentially compromising the database's security.

The Impact of CVE-2019-10127

The security issue enables attackers to trigger the execution of malicious code by the PostgreSQL service account and bypass access restrictions, potentially leading to unauthorized data access and deletion.

Technical Details of CVE-2019-10127

Vulnerability Description

The ACL of the binary installation and data directories in PostgreSQL versions 11.x prior to 11.3 is not properly secured, allowing attackers to exploit inherited ACLs.

Affected Systems and Versions

Product: PostgreSQL
Versions Affected: 11.x prior to 11.3

Exploitation Mechanism

Attackers with limited Windows and PostgreSQL account privileges can execute malicious code and access sensitive files, compromising the database's security.

Mitigation and Prevention

Immediate Steps to Take

Upgrade PostgreSQL to version 11.3 or later to mitigate the vulnerability.
Restrict access to the PostgreSQL data directory to authorized users only.

Long-Term Security Practices

Regularly monitor and audit access controls and permissions within the PostgreSQL installation.
Implement the principle of least privilege to limit user access rights.

Patching and Updates

Apply security patches and updates provided by PostgreSQL to address vulnerabilities and enhance system security.