CVE-2023-38495 : What You Need to Know

Crossplane is a framework for building cloud native control planes without needing to write code. In versions prior to 1.11.5, 1.12.3, and 1.13.0, Crossplane's image backend does not validate the byte contents of Crossplane packages. As such, Crossplane does not detect if an attacker has tampered with a Package. The problem has been fixed in 1.11.5, 1.12.3, and 1.13.0. As a workaround, only use images from trusted sources and keep Package editing/creating privileges to administrators only.

Understanding CVE-2023-38495

This CVE affects the Crossplane framework, exposing systems to potential image tampering due to missing image validation for packages.

What is CVE-2023-38495?

CVE-2023-38495 highlights an improper input validation vulnerability (CWE-20) in Crossplane that allows attackers to manipulate packages without detection.

The Impact of CVE-2023-38495

The vulnerability poses a high risk with a CVSSv3 base score of 8.4, impacting confidentiality, integrity, and availability of affected systems.

Technical Details of CVE-2023-38495

In-depth technical details of the vulnerability, including descriptions, affected systems, and exploitation mechanisms are outlined below.

Vulnerability Description

The lack of byte content validation in Crossplane's image backend allows malicious actors to tamper with packages, compromising the integrity of the system.

Affected Systems and Versions

Crossplane versions before 1.11.5, 1.12.3, and 1.13.0 are vulnerable to this issue, exposing systems to potential attacks.

Exploitation Mechanism

Attackers can exploit this vulnerability by manipulating package contents to execute unauthorized actions or inject malicious code.

Mitigation and Prevention

To mitigate the risks associated with CVE-2023-38495, certain immediate steps and long-term security practices are recommended.

Immediate Steps to Take

Update Crossplane to versions 1.11.5, 1.12.3, or 1.13.0 to address the vulnerability.
Only use images from trusted sources to minimize the risk of tampering.

Long-Term Security Practices

Restrict package editing and creation privileges to administrators only.

Patching and Updates

Regularly check for security updates and apply patches promptly to protect systems from potential exploits.