CVE-2021-21191 Explained : Impact and Mitigation
Learn about CVE-2021-21191, a critical vulnerability in Google Chrome allowing remote attackers to trigger heap corruption. Take immediate actions to update and secure your systems now.
Use after free in WebRTC in Google Chrome prior to 89.0.4389.90 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
Understanding CVE-2021-21191
This CVE refers to a vulnerability in Google Chrome that could be exploited by a remote attacker to trigger heap corruption.
What is CVE-2021-21191?
The vulnerability in WebRTC in Google Chrome before version 89.0.4389.90 allowed for a use after free scenario, enabling a potential remote attack through a maliciously crafted HTML page.
The Impact of CVE-2021-21191
The impact of this vulnerability is significant, as it could lead to heap corruption, opening the door for a remote attacker to execute arbitrary code on the target system.
Technical Details of CVE-2021-21191
This section provides more depth into the vulnerability, affected systems, and how it can be exploited.
Vulnerability Description
The vulnerability arises from a use after free flaw in WebRTC in Google Chrome versions prior to 89.0.4389.90, enabling attackers to exploit heap corruption.
Affected Systems and Versions
Chrome versions prior to 89.0.4389.90 are affected by this vulnerability, putting users at risk of remote attacks.
Exploitation Mechanism
The vulnerability can be exploited by a remote attacker through a specifically crafted HTML page, leveraging the use after free flaw in WebRTC.
Mitigation and Prevention
To safeguard systems from CVE-2021-21191, immediate steps need to be taken along with long-term security practices.
Immediate Steps to Take
Users are advised to update their Google Chrome browser to version 89.0.4389.90 or higher to mitigate the risk posed by this vulnerability.
Long-Term Security Practices
Regularly updating software, maintaining strong security configurations, and exercising caution while browsing can help prevent similar vulnerabilities in the future.
Patching and Updates
Regularly check for security updates for Google Chrome and apply patches promptly to ensure protection against known vulnerabilities.