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CVE-2017-2809 : Exploit Details and Defense Strategies

Learn about CVE-2017-2809, a high-severity vulnerability in ansible-vault before 1.0.5 allowing arbitrary Python command execution. Find mitigation steps and preventive measures here.

A vulnerability in the yaml loading feature of ansible-vault prior to version 1.0.5 allows for the execution of arbitrary Python commands, potentially leading to command execution by specially crafted vaults.

Understanding CVE-2017-2809

This CVE involves a code execution vulnerability in ansible-vault.

What is CVE-2017-2809?

An exploitable vulnerability in the yaml loading functionality of ansible-vault before version 1.0.5, where a specially crafted vault can execute arbitrary Python commands, enabling command execution.

The Impact of CVE-2017-2809

The vulnerability poses a high risk with a CVSS base score of 7.5, allowing attackers to execute arbitrary Python commands through specially crafted vaults.

Technical Details of CVE-2017-2809

This section covers the technical aspects of the CVE.

Vulnerability Description

The vulnerability allows for the execution of arbitrary Python commands through specially crafted vaults in ansible-vault.

Affected Systems and Versions

        Product: ansible-vault
        Vendor: Tomohiro Nakamura
        Vulnerable Version: 1.0.4

Exploitation Mechanism

        Attack Complexity: High
        Attack Vector: Network
        Privileges Required: None
        User Interaction: Required
        Scope: Unchanged
        Confidentiality, Integrity, and Availability Impact: High

Mitigation and Prevention

Steps to address and prevent the CVE.

Immediate Steps to Take

        Upgrade ansible-vault to version 1.0.5 or later to mitigate the vulnerability.
        Avoid using untrusted vaults or files with ansible-vault.

Long-Term Security Practices

        Regularly update and patch ansible-vault and related software.
        Implement secure coding practices to prevent code injection vulnerabilities.

Patching and Updates

        Stay informed about security updates and patches for ansible-vault.

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