CVE-2021-41641 Explained : Impact and Mitigation
Learn about CVE-2021-41641, a Deno <=1.14.0 vulnerability allowing unauthorized directory access via incorrect symbolic links handling. Find mitigation steps and prevention guidelines.
Deno <=1.14.0 file sandbox does not handle symbolic links correctly, potentially allowing unauthorized access to directories.
Understanding CVE-2021-41641
This CVE details a vulnerability in the Deno file sandbox regarding symbolic links manipulation.
What is CVE-2021-41641?
The vulnerability in Deno <=1.14.0 allows improper handling of symbolic links, enabling an attacker to gain access to directories by leveraging the Deno.symlink method.
The Impact of CVE-2021-41641
If exploited, an attacker could gain unauthorized access to sensitive directories, potentially leading to data leakage or system compromise.
Technical Details of CVE-2021-41641
This section provides technical insights into the vulnerability.
Vulnerability Description
The issue lies in Deno <=1.14.0's incorrect handling of symbolic links, particularly in the Deno.symlink method.
Affected Systems and Versions
- Product: Deno
- Vendor: N/A
- Affected Version: <=1.14.0
Exploitation Mechanism
Attackers could exploit this vulnerability by running Deno with specific write access, utilizing the Deno.symlink method to access any directory.
Mitigation and Prevention
Protecting systems from CVE-2021-41641 is crucial to maintaining security.
Immediate Steps to Take
- Update Deno to version >1.14.0 to mitigate the vulnerability.
- Avoid running Deno with unnecessary write permissions.
- Monitor system logs for any suspicious symbolic link activity.
Long-Term Security Practices
- Continuously monitor Deno security advisories and update promptly.
- Implement the principle of least privilege to restrict unnecessary access.
Patching and Updates
Stay informed about Deno updates and security patches to address CVE-2021-41641 effectively.