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CVE-2023-43116 Explained : Impact and Mitigation

CVE-2023-43116 allows unauthorized users to change directory ownership in Buildkite Elastic CI for AWS, impacting security. Learn about the vulnerability, impact, and mitigation steps.

A symbolic link following vulnerability in Buildkite Elastic CI for AWS versions prior to 6.7.1 and 5.22.5 allows the buildkite-agent user to change ownership of arbitrary directories via the PIPELINE_PATH variable in the fix-buildkite-agent-builds-permissions script.

Understanding CVE-2023-43116

This CVE involves a symbolic link following vulnerability in Buildkite Elastic CI for AWS that can be exploited by the buildkite-agent user.

What is CVE-2023-43116?

The CVE-2023-43116 vulnerability allows unauthorized users to change ownership of directories through a specific script, impacting the security of Buildkite Elastic CI for AWS.

The Impact of CVE-2023-43116

The impact of this vulnerability is significant as it provides an attacker with the ability to manipulate directory ownership, potentially leading to unauthorized access and data breaches.

Technical Details of CVE-2023-43116

This section highlights the specific technical details related to CVE-2023-43116.

Vulnerability Description

The vulnerability in Buildkite Elastic CI for AWS versions prior to 6.7.1 and 5.22.5 allows the buildkite-agent user to modify ownership of directories using the PIPELINE_PATH variable in a particular script.

Affected Systems and Versions

Buildkite Elastic CI for AWS versions before 6.7.1 and 5.22.5 are affected by this vulnerability, potentially exposing them to exploitation.

Exploitation Mechanism

Exploiting CVE-2023-43116 involves leveraging the vulnerability in the fix-buildkite-agent-builds-permissions script to change the ownership of directories.

Mitigation and Prevention

To mitigate the risks associated with CVE-2023-43116, it is essential to take immediate action and implement long-term security practices.

Immediate Steps to Take

Immediately update Buildkite Elastic CI for AWS to versions 6.7.1 and 5.22.5 or newer to prevent exploitation of this vulnerability.

Long-Term Security Practices

Establishing strict access controls, monitoring directory ownership changes, and conducting regular security audits are crucial for enhancing overall system security.

Patching and Updates

Regularly apply patches and updates provided by Buildkite to address known vulnerabilities and strengthen the security posture of the system.

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