CVE-2021-30527 : Vulnerability Insights and Analysis
Learn about CVE-2021-30527, a critical Use-after-free vulnerability in Google Chrome versions prior to 91.0.4472.77. Understand the impact, affected systems, and mitigation steps.
A detailed overview of CVE-2021-30527, a vulnerability in Google Chrome that allowed an attacker to exploit heap corruption via a crafted HTML page.
Understanding CVE-2021-30527
This section delves into the nature of the vulnerability and its impact.
What is CVE-2021-30527?
CVE-2021-30527 is a Use-after-free vulnerability in the WebUI component of Google Chrome versions prior to 91.0.4472.77. It allowed an attacker to execute arbitrary code by persuading a user to install a malicious browser extension.
The Impact of CVE-2021-30527
The exploitation of this vulnerability could result in heap corruption, potentially leading to arbitrary code execution, privilege escalation, or information disclosure.
Technical Details of CVE-2021-30527
This section provides specific technical details concerning the vulnerability.
Vulnerability Description
The vulnerability arises from improper handling of objects in memory after they have been freed, leaving the door open for an attacker to manipulate memory space.
Affected Systems and Versions
Google Chrome versions prior to 91.0.4472.77 are affected by this vulnerability, making users of these versions susceptible to exploitation.
Exploitation Mechanism
To exploit this vulnerability, an attacker would need to convince a user to install a specially crafted extension, which, when interacted with, triggers the heap corruption.
Mitigation and Prevention
In this section, we discuss steps to mitigate the risk posed by CVE-2021-30527.
Immediate Steps to Take
Users are advised to update Google Chrome to version 91.0.4472.77 or later to prevent exploitation of this vulnerability. Avoid installing extensions from untrusted sources.
Long-Term Security Practices
Regularly update your browser and extensions to the latest versions. Exercise caution when installing new browser extensions and only use those from reputable sources.
Patching and Updates
Stay informed about security updates for Google Chrome and apply them promptly to ensure protection against known vulnerabilities.