CVE-2017-7486 Explained : Impact and Mitigation

PostgreSQL versions 8.4 to 9.6 are vulnerable to an information leak in the pg_user_mappings view, potentially exposing foreign server passwords to unauthorized users.

Understanding CVE-2017-7486

This CVE involves a vulnerability in PostgreSQL versions 8.4 to 9.6 that allows users with USAGE privilege on a foreign server to access and reveal passwords.

What is CVE-2017-7486?

The versions of PostgreSQL from 8.4 to 9.6 have a vulnerability in the pg_user_mappings view. This vulnerability allows any user with USAGE privilege on the foreign server to access and disclose the passwords of the associated foreign server.

The Impact of CVE-2017-7486

Unauthorized users can potentially access and disclose passwords of foreign servers.

Technical Details of CVE-2017-7486

PostgreSQL versions 8.4 to 9.6 are affected by a vulnerability that exposes foreign server passwords.

Vulnerability Description

The vulnerability in the pg_user_mappings view of PostgreSQL versions 8.4 to 9.6 allows users with USAGE privilege on a foreign server to access and reveal passwords.

Affected Systems and Versions

Product: PostgreSQL
Vendor: The PostgreSQL Global Development Group
Versions: 8.4 - 9.6

Exploitation Mechanism

Users with USAGE privilege on a foreign server can exploit the vulnerability to access and disclose passwords.

Mitigation and Prevention

To address CVE-2017-7486, follow these steps:

Immediate Steps to Take

Update PostgreSQL to a patched version.
Restrict USAGE privilege on foreign servers.

Long-Term Security Practices

Regularly monitor and audit access to sensitive data.
Implement strong password policies and encryption practices.
Educate users on secure data handling practices.

Patching and Updates

Apply security patches provided by PostgreSQL to fix the vulnerability.