CVE-2020-25696 Explained : Impact and Mitigation

A flaw in the psql interactive terminal of PostgreSQL allows attackers to execute arbitrary code, impacting data confidentiality, integrity, and system availability.

Understanding CVE-2020-25696

A vulnerability in PostgreSQL versions before 13.1, 12.5, 11.10, 10.15, 9.6.20, and 9.5.24 could lead to code execution.

What is CVE-2020-25696?

The vulnerability exists in the psql interactive terminal of PostgreSQL.
Attackers can execute arbitrary code by using \gset in an interactive psql session on a compromised server.
The primary risk is to data confidentiality, integrity, and system availability.

The Impact of CVE-2020-25696

Data confidentiality, integrity, and system availability are at high risk due to potential arbitrary code execution.

Technical Details of CVE-2020-25696

A detailed look at the technical aspects of the vulnerability.

Vulnerability Description

Vulnerability in the psql interactive terminal of PostgreSQL.
Allows attackers to execute arbitrary code.

Affected Systems and Versions

All PostgreSQL versions before 13.1, 12.5, 11.10, 10.15, 9.6.20, and 9.5.24.

Exploitation Mechanism

Attacker uses \gset in an interactive psql session on a compromised server to execute arbitrary code.

Mitigation and Prevention

Steps to mitigate and prevent exploitation of CVE-2020-25696.

Immediate Steps to Take

Update PostgreSQL to versions 13.1, 12.5, 11.10, 10.15, 9.6.20, or 9.5.24.
Avoid using \gset in interactive psql sessions on untrusted servers.

Long-Term Security Practices

Regularly update PostgreSQL and other software to the latest versions.
Implement network segmentation and access controls to limit exposure.
Educate users on safe practices to prevent code execution vulnerabilities.

Patching and Updates

Apply patches provided by PostgreSQL to address the vulnerability.