CVE-2021-38019 : Exploit Details and Defense Strategies
Learn about CVE-2021-38019, an insufficient policy enforcement issue in Google Chrome, allowing attackers to leak cross-origin data. Find out the impact, technical details, and mitigation steps.
A detailed overview of CVE-2021-38019 regarding insufficient policy enforcement in CORS in Google Chrome prior to version 96.0.4664.45.
Understanding CVE-2021-38019
This section provides insight into the vulnerability, its impact, technical details, and mitigation strategies.
What is CVE-2021-38019?
The vulnerability involves Chrome's insufficient policy enforcement in Cross-Origin Resource Sharing (CORS), enabling a remote attacker to leak cross-origin data through a maliciously crafted HTML page.
The Impact of CVE-2021-38019
The vulnerability allows threat actors to exploit CORS policies in Chrome versions less than 96.0.4664.45, leading to the unauthorized disclosure of sensitive cross-origin data.
Technical Details of CVE-2021-38019
Explore the specifics of the vulnerability including its description, affected systems, versions, and exploitation mechanism.
Vulnerability Description
The flaw in CORS enforcement within Chrome versions prior to 96.0.4664.45 permits attackers to exfiltrate cross-origin data by leveraging a specially created HTML page.
Affected Systems and Versions
Google Chrome versions below 96.0.4664.45 are impacted by this vulnerability due to inadequate CORS policy checks, allowing for data leakage.
Exploitation Mechanism
Remote attackers can exploit this vulnerability by enticing users to visit a malicious website containing a crafted HTML page designed to extract cross-origin data.
Mitigation and Prevention
Discover the immediate steps to secure systems, best security practices, and the importance of timely patching and updates.
Immediate Steps to Take
Users should update Chrome to version 96.0.4664.45 or newer, restrict access to potentially malicious websites, and employ security tools to mitigate risks.
Long-Term Security Practices
Maintain a proactive approach to security by monitoring browser security advisories, enforcing strict CORS policies, and conducting regular security audits.
Patching and Updates
Regularly apply security patches provided by Google to ensure Chrome is protected against known vulnerabilities and follow safe browsing habits.