CVE-2021-23406 Explained : Impact and Mitigation
Learn about CVE-2021-23406, a Remote Code Execution (RCE) vulnerability in pac-resolver before 5.0.0. Find out the impact, affected systems, and steps to mitigate this high-severity issue.
This CVE-2021-23406 involves the pac-resolver package before version 5.0.0, exposing systems to Remote Code Execution (RCE) when handling untrusted input. The vulnerability has a CVSS base score of 8.1, indicating a high severity level.
Understanding CVE-2021-23406
This section delves into the impact and technical details of CVE-2021-23406.
What is CVE-2021-23406?
CVE-2021-23406 pertains to a Remote Code Execution vulnerability in pac-resolver prior to version 5.0.0. Due to unsafe PAC file handling, attackers can exploit this flaw when untrusted input is utilized.
The Impact of CVE-2021-23406
With a CVSS base score of 8.1, this vulnerability poses a significant threat. Its high attack complexity and vector require no user privileges, allowing attackers to execute code remotely with severe confidentiality, integrity, and availability impacts.
Technical Details of CVE-2021-23406
Explore the specifics of this vulnerability in-depth.
Vulnerability Description
The vulnerability in pac-resolver before 5.0.0 facilitates Remote Code Execution when exposed to untrusted input, attributable to unsafe PAC file handling.
Affected Systems and Versions
Systems using pac-resolver versions earlier than 5.0.0 are at risk of exploitation by threat actors seeking to achieve Remote Code Execution capabilities.
Exploitation Mechanism
By manipulating PAC file input, threat actors can craft malicious payloads that execute arbitrary code on vulnerable systems remotely.
Mitigation and Prevention
Understand how to address and prevent CVE-2021-23406.
Immediate Steps to Take
Organizations should update to pac-resolver version 5.0.0 or newer to mitigate the Remote Code Execution risk. Implement network security measures to detect and block potential exploits.
Long-Term Security Practices
Regularly update software components and libraries, conduct security assessments, and employ secure coding practices to reduce the likelihood of similar vulnerabilities.
Patching and Updates
Stay informed about security patches and updates for pac-resolver to address known vulnerabilities and enhance the overall security posture of systems.