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CVE-2023-0482 : Vulnerability Insights and Analysis

Learn about CVE-2023-0482, a security flaw in RESTEasy allowing local users to access sensitive information due to insecure file permissions. Get mitigation steps and updates.

This CVE, published on February 17, 2023, highlights a security vulnerability in RESTEasy that could allow a local user to read sensitive information due to insecure file permissions.

Understanding CVE-2023-0482

This section delves into the details of CVE-2023-0482, elucidating the nature of the vulnerability and its implications.

What is CVE-2023-0482?

The vulnerability in RESTEasy stems from the insecure usage of File.createTempFile() in classes like DataSourceProvider, FileProvider, and Mime4JWorkaround. This results in the creation of temporary files with lax permissions, potentially exposing them to unauthorized access by a local user.

The Impact of CVE-2023-0482

The impact of this vulnerability could lead to unauthorized disclosure of sensitive information stored in these temporary files. A malicious actor with local access to the system could exploit this to access confidential data, posing a significant security risk.

Technical Details of CVE-2023-0482

In this section, we delve deeper into the technical aspects of CVE-2023-0482, including the vulnerability description, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

The vulnerability arises from the insecure handling of temporary files by RESTEasy classes like DataSourceProvider, FileProvider, and Mime4JWorkaround. This insecure implementation allows local users to read sensitive information from these temporary files.

Affected Systems and Versions

The vulnerability affects versions of RESTEasy prior to 4.7.8.Final. Systems using affected versions are at risk of exposing sensitive data due to insecure file permissions in temporary files created by the mentioned classes.

Exploitation Mechanism

To exploit this vulnerability, a local user could leverage the insecure file permissions set by RESTEasy when creating temporary files in the affected classes. By reading these files, unauthorized access to sensitive information could be obtained.

Mitigation and Prevention

This section outlines steps to mitigate the risks posed by CVE-2023-0482, including immediate measures and long-term security practices to enhance system protection.

Immediate Steps to Take

        Organizations using RESTEasy should promptly update to version 4.7.8.Final or later to mitigate the vulnerability.
        Monitor and restrict access to temporary files to prevent unauthorized reading by local users.

Long-Term Security Practices

        Implement secure coding practices to avoid vulnerabilities related to file handling and permissions.
        Conduct regular security audits and assessments to identify and address potential security weaknesses in the system.

Patching and Updates

        Regularly check for security updates and patches released by RESTEasy to stay protected against known vulnerabilities.
        Ensure timely application of patches to address security issues and enhance the overall security posture of the system.

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