CVE-2021-42343 : Security Advisory and Response
Discover the details of CVE-2021-42343 where a vulnerability in Dask distributed package could allow remote code execution. Learn how to mitigate and prevent this issue.
An issue was discovered in the Dask distributed package before 2021.10.0 for Python where single machine Dask clusters could mistakenly configure workers to listen on external interfaces, potentially leading to remote code execution.
Understanding CVE-2021-42343
What is CVE-2021-42343?
The vulnerability in the Dask distributed package allowed attackers to exploit a misconfiguration in single machine Dask clusters to achieve remote code execution. This could be done by utilizing exposed ports on the affected machine.
The Impact of CVE-2021-42343
The vulnerability could be leveraged by a sophisticated attacker to remotely execute arbitrary code on the affected system, potentially leading to unauthorized access and other security compromises.
Technical Details of CVE-2021-42343
Vulnerability Description
The Dask distributed package before 2021.10.0 for Python misconfigured workers in single machine Dask clusters to listen on external interfaces instead of only on localhost, enabling potential remote code execution.
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Versions: All versions before 2021.10.0
Exploitation Mechanism
An attacker could exploit this vulnerability by creating a Dask cluster on a machine with an exposed port, allowing them to execute code remotely.
Mitigation and Prevention
Immediate Steps to Take
- Update Dask distributed package to version 2021.10.0 or later
- Avoid exposing unnecessary ports on machines
Long-Term Security Practices
- Regularly check for security updates and patches for Dask
- Implement network segmentation to restrict access
Patching and Updates
It is essential to apply the latest patches and updates provided by Dask to mitigate the vulnerability and enhance overall system security.