CVE-2019-9193 : Security Advisory and Response

CVE-2019-9193 is a vulnerability in PostgreSQL versions 9.3 through 11.2 that allows superusers and specific users to execute code in the context of the operating system user of the database. This feature can be exploited to run commands on Windows, Linux, and macOS systems.

Understanding CVE-2019-9193

This CVE involves a feature in PostgreSQL that enables users to execute code in the context of the operating system user of the database, potentially leading to unauthorized command execution.

What is CVE-2019-9193?

The "COPY TO/FROM PROGRAM" feature in PostgreSQL versions 9.3 through 11.2 allows certain users to run commands on the operating system of the database server. Although some argue that this is not a problem, it can be misused for unauthorized command execution.

The Impact of CVE-2019-9193

This vulnerability can be exploited by superusers and specific users to execute commands on the underlying operating system, posing a significant security risk to the affected systems.

Technical Details of CVE-2019-9193

The technical aspects of this CVE include:

Vulnerability Description

PostgreSQL versions 9.3 through 11.2 are affected
Allows execution of commands in the context of the operating system user

Affected Systems and Versions

Vendor: n/a
Product: n/a
Versions: All versions of PostgreSQL 9.3 through 11.2

Exploitation Mechanism

Superusers and 'pg_execute_server_program' group users can exploit the "COPY TO/FROM PROGRAM" feature to run commands on the OS user of the database server

Mitigation and Prevention

To address CVE-2019-9193, consider the following steps:

Immediate Steps to Take

Disable the "COPY TO/FROM PROGRAM" feature if not essential
Regularly monitor and audit database activities

Long-Term Security Practices

Implement the principle of least privilege for database users
Keep PostgreSQL updated with the latest security patches

Patching and Updates

Apply relevant security patches provided by PostgreSQL to mitigate the vulnerability