CVE-2017-12172 : Vulnerability Insights and Analysis

PostgreSQL versions 10.x before 10.1, 9.6.x before 9.6.6, 9.5.x before 9.5.10, 9.4.x before 9.4.15, 9.3.x before 9.3.20, and 9.2.x before 9.2.24, provided by Red Hat, Inc., are affected by a vulnerability that allows database superusers to execute arbitrary code under a non-root OS account.

Understanding CVE-2017-12172

This CVE involves PostgreSQL versions running under a non-root operating system account, enabling database superusers to execute arbitrary code under that account.

What is CVE-2017-12172?

Prior to version 10.1, PostgreSQL versions 10.x, 9.6.6, 9.5.10, 9.4.15, 9.3.20, and 9.2.24 operate using a non-root OS account, allowing database superusers to execute arbitrary code under that account. This vulnerability arises from the way PostgreSQL handles the startup script during system boot.

The Impact of CVE-2017-12172

The vulnerability allows database superusers to escalate privileges and potentially gain root access when the server is started by root, compromising the security and integrity of the system.

Technical Details of CVE-2017-12172

PostgreSQL versions 10.x before 10.1, 9.6.x before 9.6.6, 9.5.x before 9.5.10, 9.4.x before 9.4.15, 9.3.x before 9.3.20, and 9.2.x before 9.2.24 are affected by this vulnerability.

Vulnerability Description

The vulnerability allows database superusers to execute arbitrary code under a non-root OS account, potentially leading to privilege escalation.

Affected Systems and Versions

PostgreSQL 10.x before 10.1
PostgreSQL 9.6.x before 9.6.6
PostgreSQL 9.5.x before 9.5.10
PostgreSQL 9.4.x before 9.4.15
PostgreSQL 9.3.x before 9.3.20
PostgreSQL 9.2.x before 9.2.24

Exploitation Mechanism

Database superusers can manipulate the log file name used during server startup to escalate privileges.

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent the exploitation of this vulnerability.

Immediate Steps to Take

Apply security patches provided by Red Hat, Inc.
Monitor for any unauthorized access or suspicious activities.
Restrict database superuser privileges to minimize the impact of potential attacks.

Long-Term Security Practices

Regularly update and patch PostgreSQL installations.
Implement strong access controls and least privilege principles.
Conduct security audits and vulnerability assessments periodically.

Patching and Updates

Update PostgreSQL to versions that have addressed this vulnerability.
Stay informed about security advisories and updates from Red Hat, Inc. and PostgreSQL.