CVE-2021-30633 is a critical use-after-free vulnerability in the Indexed DB API of Google Chrome, affecting versions prior to 93.0.4577.82. The vulnerability allows a remote attacker who compromises the renderer process to potentially perform a sandbox escape via a crafted HTML page. This vulnerability has been classified as critical due to its high CVSS score of 9.6, indicating its severe impact on confidentiality, integrity, and availability.
The exploitation of this vulnerability could lead to unauthorized access and control over affected systems, making it a significant threat for organizations relying on Google Chrome for their operations. Organizations must prioritize remediation efforts to mitigate these risks and protect sensitive data.
Since its disclosure on October 8, 2021, organizations using affected versions of Google Chrome are urged to apply patches immediately. Failure to do so may expose them to potential attacks leveraging this vulnerability.
With the increasing sophistication of cyber threats, organizations should remain vigilant and regularly update their software to mitigate vulnerabilities such as CVE-2021-30633.
Vulnerability Details
The official description of CVE-2021-30633 states that it is a use-after-free vulnerability in the Indexed DB API in Google Chrome versions prior to 93.0.4577.82. The vulnerability allows a remote attacker who has compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page.
The CVSS score for this vulnerability is 9.6, categorizing it as critical. This score indicates a high level of risk due to the potential for significant confidentiality, integrity, and availability impacts. The attack vector is classified as network-based, with low complexity, no required privileges, and user interaction needed.
The vulnerability is associated with CWE-416, indicating a use-after-free condition. Proper understanding and addressing of such vulnerabilities are crucial for maintaining secure application environments.
Technical Analysis
The root cause of CVE-2021-30633 lies in the improper management of memory within the Indexed DB API, leading to a use-after-free condition. This can occur when the memory allocated for an object is freed, but references to that memory are still in use, allowing potential exploitation.
The attack vector involves network-based exploitation, where a user must interact with a malicious webpage. The complexity is low, as no special privileges are required to exploit this vulnerability. User interaction is necessary, as the victim must visit a crafted HTML page for the attack to succeed.
The impacts of this vulnerability are significant, affecting confidentiality, integrity, and availability. Successful exploitation could allow attackers to access sensitive data, manipulate browser behavior, or disrupt services.
Risk & Impact Analysis
Organizations may face severe risks due to CVE-2021-30633, as it allows for remote exploitation and potential sandbox escape. The blast radius includes any organization utilizing affected versions of Google Chrome, especially those handling sensitive information.
The urgency for remediation is critical, reflecting the CVSS score of 9.6, indicating that organizations should prioritize patching immediately. With attackers continuously seeking vulnerabilities to exploit, addressing this and similar vulnerabilities should be a top priority for security teams.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | Yes |
Ransomware Use | No |
Affected Versions
The vulnerable versions of Google Chrome are all versions prior to 93.0.4577.82. Organizations running these versions should take immediate action to upgrade to the latest version to ensure protection against this critical vulnerability.
Mitigation & Remediation
Organizations should apply updates per vendor instructions without delay. For Google Chrome, users can find the necessary updates by visiting the official release notes.
If immediate patching is not feasible, organizations should implement network controls to restrict access to potentially malicious sites, monitor user activity for abnormal behavior, and educate users about avoiding untrusted links.
Detection Guidance
Monitoring logs for unusual access patterns and behavioral anomalies can aid in detecting exploitation attempts. Organizations should establish network signatures to identify malicious activity linked to this vulnerability.
AppSecure Threat Intelligence Insight
CVE-2021-30633 represents a significant risk given its critical nature and the potential for exploitation. This vulnerability underscores the necessity for organizations to maintain robust security hygiene and regular update practices.
The trend towards exploiting vulnerabilities in widely used software like Google Chrome highlights the importance of proactive security measures, including regular penetration testing and vulnerability assessments.
For organizations, understanding vulnerabilities such as CVE-2021-30633 is crucial in building a resilient cybersecurity posture. Implementing a continuous security strategy will help mitigate the risks posed by such vulnerabilities.
Continuous penetration testing can help organizations identify and remediate vulnerabilities promptly.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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