CVE-2021-32619 : Exploit Details and Defense Strategies
Discover the impact of CVE-2021-32619, a critical vulnerability in Deno runtime versions 1.5.0 to 1.10.1. Learn about the exploitation mechanism, affected systems, and mitigation steps.
Denial is a runtime for JavaScript and TypeScript that uses V8 and is built in Rust. In Deno versions 1.5.0 to 1.10.1, certain modules could bypass network and file system permission checks when dynamically imported. This vulnerability has been addressed in Deno release 1.10.2.
Understanding CVE-2021-32619
A vulnerability in Deno versions 1.5.0 to 1.10.1 allowed dynamically imported modules to bypass permission checks, impacting network and file system security.
What is CVE-2021-32619?
CVE-2021-32619 pertains to a flaw in Deno versions 1.5.0 to 1.10.1 that enabled modules loaded through dynamic imports to evade network and file system permissions.
The Impact of CVE-2021-32619
The vulnerability in static imports inside dynamically loaded modules in Deno can lead to a critical impact, compromising confidentiality, integrity, and availability.
Technical Details of CVE-2021-32619
The vulnerability leverages dynamic imports in Deno versions 1.5.0 to 1.10.1, allowing modules to sidestep network and file system permission checks.
Vulnerability Description
Modules loaded dynamically in Deno versions 1.5.0 to 1.10.1 may circumvent network and file system permission checks, potentially leading to unauthorized access.
Affected Systems and Versions
Deno versions prior to 1.10.2 are vulnerable to this security issue, impacting systems that rely on permissions for network and file system access.
Exploitation Mechanism
By exploiting dynamic import functionalities, threat actors could evade crucial permission checks in Deno, exploiting the vulnerability for malicious activities.
Mitigation and Prevention
To address CVE-2021-32619, immediate steps are crucial to prevent unauthorized access and maintain system security.
Immediate Steps to Take
Users are advised to update Deno to version 1.10.2 or above to mitigate the security risk posed by this vulnerability.
Long-Term Security Practices
Implementing secure coding practices and regularly updating dependencies can help prevent similar authorization issues in the future.
Patching and Updates
Regularly monitoring for security updates from Deno and promptly applying patches can safeguard systems from known vulnerabilities.