CVE-2021-21116 is a high-severity vulnerability affecting Google Chrome, specifically prior to version 87.0.4280.141. This vulnerability allows a heap buffer overflow in the audio component, which can be exploited by a remote attacker using a specially crafted HTML page. The potential impact of this vulnerability includes heap corruption, which could lead to unauthorized actions or access to sensitive data.
With a CVSS score of 8.8, this vulnerability is classified as high severity. Its exploitation is feasible due to its low attack complexity and the requirement for user interaction, meaning a victim must load the malicious content for the attack to succeed. The risks to organizations include significant confidentiality, integrity, and availability impacts.
Given the exploitation status indicates no known exploits exist currently, organizations should still treat this vulnerability with urgency. The potential risks from exploitation could result in severe operational disruptions or data breaches. Therefore, organizations should prioritize patching immediately.
The urgency for defenders is heightened due to the nature of browser vulnerabilities, which are often targeted by attackers seeking to gain a foothold in systems. As such, users and administrators are urged to update their Google Chrome installations to the latest version to mitigate any risks associated with this vulnerability.
Vulnerability Details
The official description of CVE-2021-21116 states: "Heap buffer overflow in audio in Google Chrome prior to 87.0.4280.141 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page." This vulnerability is classified under CWE-787, indicating a heap buffer overflow issue.
Google has released a patch to address this vulnerability. The vulnerability affects several products, including the Chrome browser and operating systems using it, such as Debian and Fedora. Organizations utilizing these systems should verify their software versions to ensure they are not using vulnerable builds.
Technical Analysis
The root cause of CVE-2021-21116 is a heap buffer overflow in the audio processing component of Google Chrome. Attackers can exploit this vulnerability via network access, requiring low complexity and no privileges. However, user interaction is required as the victim must load the malicious HTML page.
The attack complexity is categorized as low, which means that exploiting the vulnerability does not require sophisticated techniques. The attacker gains significant capabilities as the vulnerability has high impacts on confidentiality, integrity, and availability. Successful exploitation could lead to complete control over the affected system.
Risk & Impact Analysis
Risk to organizations includes potential data breaches, unauthorized access to sensitive information, and operational disruptions. The blast radius is considerable, given that many users run vulnerable versions of the Chrome browser. As such, organizations must assess their use of Chrome and implement immediate updates.
With an EPS score indicating a low probability of exploitation at 0.015, the risk remains non-negligible, especially as attackers continuously seek out browser vulnerabilities. The exploitation status is particularly urgent given the potential for widespread impact across user bases.
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The vulnerability impacts all versions of Google Chrome prior to 87.0.4280.141. Additionally, it affects Debian Linux version 10.0 and Fedora versions 32 and 33. Organizations should verify their software versions and ensure timely updates to prevent potential exploitation.
Mitigation & Remediation
To mitigate the risks associated with CVE-2021-21116, organizations should immediately upgrade Google Chrome to version 87.0.4280.141 or later. Additionally, organizations using Debian or Fedora systems should ensure they apply the available patches.
In the absence of immediate patch availability, organizations should consider implementing network controls to restrict access to potentially malicious HTML content. Regular monitoring of systems for any unusual behavior or anomalies is also recommended.
For further assistance on security measures, organizations may benefit from services such as penetration testing to validate their security posture.
Detection Guidance
Organizations should monitor their logs for any indicators of exploitation attempts related to this vulnerability. Key indicators may include unusual access attempts or error logs associated with audio processing components. Additionally, behavioral anomalies in system performance may indicate successful exploitation.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2021-21116 lies in the ongoing need for robust security practices in web browsers. As attackers increasingly target vulnerabilities in widely-used software, the necessity for proactive security measures becomes paramount. This vulnerability serves as a reminder of the critical importance of timely patch management.
Organizations should consider adopting a comprehensive vulnerability management program to continuously assess and address security risks. Additionally, implementing a strategy for penetration testing methodology can further enhance defense mechanisms against evolving threats.
In conclusion, CVE-2021-21116 highlights the importance of vigilant security practices and the need for organizations to remain informed about vulnerabilities that may affect their systems.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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