CVE-2022-39215 : What You Need to Know

Tauri is a framework for building binaries for all major desktop platforms. The CVE-2022-39215 vulnerability in Tauri allowed the readDir endpoint scope to be bypassed using symbolic links, potentially leading to directory listings being displayed outside the defined fs scope.

Understanding CVE-2022-20657

This section will provide insights into the nature and impact of the CVE-2022-39215 vulnerability.

What is CVE-2022-39215?

CVE-2022-39215 refers to the vulnerability in Tauri, a framework for building binaries. It allowed bypassing the readDir endpoint scope using symbolic links, which could potentially expose directory listings beyond the defined fs scope.

The Impact of CVE-2022-39215

The impact of this vulnerability could lead to unauthorized access to directory listings outside the intended scope. However, no arbitrary file content could be leaked as a result of this issue.

Technical Details of CVE-2022-39215

In this section, we will delve into the technical aspects of the CVE-2022-39215 vulnerability.

Vulnerability Description

The vulnerability stemmed from missing canonicalization when the

readDir

endpoint was called recursively, enabling the display of directory listings beyond the defined

fs

scope using crafted symbolic links or junction folders.

Affected Systems and Versions

The CVE-2022-39215 vulnerability impacts Tauri versions prior to 1.0.6.

Exploitation Mechanism

To exploit this vulnerability, an attacker could create a symbolic link or junction folder inside an allowed path of the

fs

scope to display directory listings outside the defined scope.

Mitigation and Prevention

To mitigate the risks associated with CVE-2022-39215, certain measures can be taken to enhance the security of Tauri framework users.

Immediate Steps to Take

Users are strongly advised to upgrade to Tauri version 1.0.6 or higher, where the issue has been resolved. For users unable to upgrade immediately, disabling the

readDir

endpoint in the

allowlist

within the

tauri.conf.json

can help mitigate the vulnerability.

Long-Term Security Practices

Implementing secure coding practices, conducting regular security audits, and staying informed about security updates are essential for maintaining the security of Tauri applications.

Patching and Updates

Keeping Tauri framework up to date with the latest patches and security updates is crucial to prevent exploitation of known vulnerabilities.