CVE-2021-21233 is a high-severity heap buffer overflow vulnerability in Google Chrome's ANGLE component on Windows. This vulnerability allows remote attackers to potentially exploit heap corruption through specially crafted HTML pages. It has a CVSS score of 8.8, making it critical for organizations to address this issue promptly.
The potential impact of this vulnerability includes unauthorized access to sensitive information, modification of data, and denial of service due to high confidentiality, integrity, and availability impacts. Given the nature of this vulnerability and its ease of exploitation, organizations should prioritize patching immediately.
As of now, no public exploits have been confirmed for this vulnerability, but it remains crucial for organizations to remain vigilant. The urgency for defenders is high due to the potential risks associated with unpatched instances of Google Chrome.
Organizations using Google Chrome should ensure they are running version 90.0.4430.93 or later to mitigate this vulnerability effectively. Regular updates and security assessments are vital in maintaining the security posture against such vulnerabilities.
Vulnerability Details
The official description states that this vulnerability allows a remote attacker to potentially exploit heap corruption via a crafted HTML page. It has been classified under CWE-787, indicating a heap buffer overflow issue.
The CVSS score of 8.8 signifies a high severity level, indicating that the vulnerability is easy to exploit with network access and requires user interaction. This highlights the importance of education and awareness for users to avoid such crafted attacks.
The affected products include Google Chrome on Windows versions prior to 90.0.4430.93, alongside various distributions of Fedora and Debian Linux. This broad impact necessitates prompt action from all affected users.
Technical Analysis
The root cause of CVE-2021-21233 lies in the heap buffer overflow within the ANGLE component of Google Chrome. Attackers may leverage this vulnerability by inducing a user to visit a maliciously crafted HTML page, leading to potential heap corruption.
The attack vector is network-based, requiring low attack complexity, and no privileges are required to exploit this vulnerability. However, user interaction is necessary, increasing the need for security awareness among users.
The impacts include high confidentiality, integrity, and availability risks, as successful exploitation could lead to unauthorized access, data corruption, or denial of service.
Risk & Impact Analysis
The real-world deployment risk associated with this vulnerability is significant. Organizations that fail to patch this vulnerability could face severe consequences, including data breaches and loss of customer trust.
The blast radius of this vulnerability is extensive due to the wide usage of Google Chrome, affecting numerous users and organizations. The urgency for remediation is underscored by the high CVSS score and potential exploitation scenarios.
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions include Google Chrome prior to 90.0.4430.93, Fedora versions 32, 33, and 34, as well as Debian Linux 10.0. Organizations should update to the latest versions to mitigate this vulnerability.
Mitigation & Remediation
To remediate this vulnerability, organizations should update to Google Chrome version 90.0.4430.93 or later. For those using affected versions of Fedora and Debian, relevant patches should be applied as soon as possible. Configuration hardening and continuous monitoring are also recommended to detect any unusual activities.
Organizations should validate remediation through penetration testing to identify similar weaknesses.
Detection Guidance
Monitoring logs for unusual activity, especially those related to web page loading and rendering, can help detect potential exploitation attempts. Behavioral anomalies in user sessions or network traffic related to the Chrome application should also be investigated.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2021-21233 lies in its representation of the ongoing challenges faced by organizations in securing web applications against buffer overflow vulnerabilities. Security teams should leverage this incident to enhance their defensive strategies.
Organizations are encouraged to review their application security testing practices, adopting a comprehensive approach that includes both static and dynamic testing methodologies. Additionally, they should implement rigorous monitoring to detect potential exploitation attempts.
For further insights, consider exploring our resources on penetration testing methodology and vulnerability management programs to bolster your security posture.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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