CVE-2022-35861 Explained : Impact and Mitigation

A security vulnerability, tracked as CVE-2022-35861, has been identified in pyenv versions 1.2.24 through 2.3.2. This vulnerability allows local users to escalate their privileges by exploiting a specific file in the working directory.

Understanding CVE-2022-35861

This section delves into the details of the CVE-2022-35861 vulnerability.

What is CVE-2022-35861?

The CVE-2022-35861 vulnerability in pyenv versions 1.2.24 through 2.3.2 enables local users to gain elevated privileges by manipulating a .python-version file in the current working directory. By creating a malicious Python version string in this file, an attacker can execute shims under their control. Shims are executables that forward commands to a particular pyenv version. The lack of validation on the version specified in the string allows for relative path traversal.

The Impact of CVE-2022-35861

Exploiting this vulnerability can lead to unauthorized privilege escalation for local users. By crafting a Python version string in the .python-version file, an attacker can execute shims, potentially compromising the security of the system.

Technical Details of CVE-2022-35861

Explore the technical aspects related to CVE-2022-35861 below.

Vulnerability Description

The vulnerability stems from a lack of validation in handling Python version strings in the .python-version file. This loophole enables attackers to execute shims with escalated privileges.

Affected Systems and Versions

Versions 1.2.24 through 2.3.2 of pyenv are impacted by this vulnerability. Users operating on these versions are advised to take immediate action.

Exploitation Mechanism

Attackers can exploit this vulnerability by carefully crafting a Python version string in the .python-version file to execute shims under their control, potentially leading to unauthorized privilege escalation.

Mitigation and Prevention

Learn about the measures that can be taken to mitigate and prevent the exploitation of CVE-2022-35861.

Immediate Steps to Take

To address this vulnerability, it is crucial to update pyenv to a secure version and validate user inputs to prevent unauthorized escalation of privileges.

Long-Term Security Practices

Implementing stringent file permission settings, monitoring user activities, and regular security training can enhance the overall security posture of the system.

Patching and Updates

Stay proactive with software updates and patches released by the pyenv community to address security vulnerabilities promptly.