CVE-2023-39532 : Vulnerability Insights and Analysis
Learn about CVE-2023-39532, a critical vulnerability in endojs's SES JavaScript environment allowing arbitrary exfiltration and execution. Understand its impact, affected versions, and mitigation steps.
This article provides detailed information about CVE-2023-39532, a critical vulnerability affecting endojs's SES Javascript environment.
Understanding CVE-2023-39532
CVE-2023-39532 is a vulnerability in SES's dynamic import and spread operator, allowing arbitrary exfiltration and execution. It has a CVSS base score of 9.8 (Critical).
What is CVE-2023-39532?
In versions of SES prior to 0.18.7, an attacker can exploit a hole in guest application confinement, enabling exfiltration or arbitrary code execution. This is achieved through dynamic import and spread operator misuse.
The Impact of CVE-2023-39532
The vulnerability exposes systems to high risk, enabling attackers to bypass security controls, potentially leading to data exfiltration and unauthorized code execution.
Technical Details of CVE-2023-39532
The affected versions of endojs include 0.18.0 to 0.18.7, 0.17.0, 0.16.0, 0.15.0 to 0.15.24, 0.14.0 to 0.14.5, and 0.13.0 to 0.13.5. End users need to apply patches released for versions 0.18.7, 0.17.1, 0.16.1, 0.15.24, 0.14.5, and 0.13.5.
Vulnerability Description
The vulnerability allows guest programs to access surrounding host resources, potentially leading to information leakage or code execution based on the guest's configuration and permissions.
Affected Systems and Versions
Versions of endojs prior to 0.18.7 are affected, specifically in ranges mentioned earlier. Users within Node.js or XS workers are more susceptible to exploitation.
Exploitation Mechanism
Attackers gain access to host resources via dynamic imports, circumventing security mechanisms. A proper Content-Security-Policy helps mitigate these risks.
Mitigation and Prevention
End users can follow immediate and long-term security practices to mitigate the risks associated with CVE-2023-39532.
Immediate Steps to Take
Users should apply available patches immediately. Implement Content-Security-Policies, especially in web environments, to restrict dynamic imports.
Long-Term Security Practices
Developers should build robust security controls, limit module loading capabilities in XS workers, and follow best practices for dynamic imports.
Patching and Updates
Updating to patched versions 0.18.7, 0.17.1, 0.16.1, 0.15.24, 0.14.5, and 0.13.5 is crucial to prevent exploitation and maintain system integrity.