CVE-2021-37976 is a medium-severity vulnerability affecting Google Chrome versions prior to 94.0.4606.71. This vulnerability allows a remote attacker to obtain potentially sensitive information from process memory via a crafted HTML page. The reported CVSS score for this vulnerability is 6.5, indicating a medium level of risk. Organizations should prioritize patching immediately to mitigate potential risks associated with this vulnerability.
Given the nature of this vulnerability, the real-world risk context involves the potential for attackers to exploit the flaw to access sensitive data stored in memory. This could lead to unauthorized information disclosure, impacting user privacy and data integrity. Organizations utilizing affected versions of Google Chrome should address this vulnerability as part of their immediate security measures.
As of the last known update, there have been no confirmed public exploits related to this vulnerability. However, its inclusion in the CISA Known Exploited Vulnerabilities catalog indicates that it is actively monitored and could be targeted by attackers. Organizations are urged to implement the necessary patches as soon as possible.
The urgency for defenders to act cannot be overstated. Organizations should ensure that their patch management processes are up to date and that all systems running affected versions of Google Chrome are upgraded without delay.
Vulnerability Details
The vulnerability is classified as an inappropriate implementation in memory within Google Chrome. The official description states that this flaw allows a remote attacker to obtain potentially sensitive information from process memory via a crafted HTML page. This vulnerability falls under the Common Weakness Enumeration (CWE) ID CWE-862.
The CVSS score of 6.5 reflects the following characteristics: the attack vector is network-based, the attack complexity is low, and no privileges are required for exploitation. User interaction is required, as the victim must visit a malicious web page.
The vulnerability affects multiple systems utilizing Google Chrome, including various distributions of Linux such as Fedora and Debian. It is essential to note that all versions prior to the vendor patch are susceptible.
Technical Analysis
The root cause of this vulnerability lies in the improper handling of memory within the Google Chrome application. Specifically, the flaw is related to how sensitive information is managed and stored in memory, which can be exploited by a malicious actor.
The attack vector is primarily network-based, meaning attackers can exploit this vulnerability via the internet. The complexity of the attack is categorized as low, allowing relatively straightforward exploitation methods. As mentioned, no privileges are required for exploitation, but user interaction is necessary, as the user must visit a malicious web page.
In terms of impact, the confidentiality of sensitive information is rated as high, while integrity and availability impacts are rated as none. This means that while sensitive data can potentially be disclosed, the attack does not compromise the integrity or availability of the affected system.
Risk & Impact Analysis
The real-world risk associated with CVE-2021-37976 is significant, particularly for organizations that rely on Google Chrome for web browsing. The potential for attackers to access sensitive information can lead to severe data breaches and violate user privacy. The blast radius includes all users of affected Chrome versions, with a risk of widespread exploitation if not addressed promptly.
Organizations should assess their current deployment of Google Chrome and prioritize updates to mitigate risks associated with this vulnerability. The urgency is further emphasized by its inclusion in the CISA Known Exploited Vulnerabilities catalog, which indicates that it is actively exploited in the wild.
The urgency for remediation is categorized as critical due to the potential for significant damage from exploitation. As such, organizations should aim to address this vulnerability in their immediate patch cycle.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | Yes |
Ransomware Use | No |
Affected Versions
The vulnerability affects all versions of Google Chrome prior to version 94.0.4606.71. Additionally, it impacts various distributions of Linux, including Fedora versions 33 to 35 and Debian versions 10.0 and 11.0. Organizations should ensure that they are running the latest versions of these products to mitigate exposure.
Mitigation & Remediation
Organizations should apply updates per vendor instructions immediately. The recommended action is to upgrade to Google Chrome version 94.0.4606.71 or later. If immediate patching is not feasible, consider implementing network controls to restrict access to malicious sites that could exploit this vulnerability. Continuous monitoring and logging should be enhanced to detect any abnormal activity that may indicate exploitation attempts.
For further information on effective security practices, organizations can refer to the penetration testing services offered by AppSecure, which help identify and mitigate vulnerabilities in web applications.
Detection Guidance
To detect attempts to exploit this vulnerability, organizations should monitor logs for indicators of unauthorized access attempts, including unusual requests to web pages. Behavioral anomalies in user interactions with web applications should also be investigated, as they may indicate exploitation. Additionally, network signatures associated with known attack patterns should be integrated into detection systems.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2021-37976 is substantial. This vulnerability reflects ongoing challenges in secure memory management and the importance of rigorous testing within web applications. It serves as a reminder for security teams to prioritize the security of their applications and to continually assess vulnerabilities that could lead to data exposure.
Organizations are urged to enhance their security posture by adopting comprehensive vulnerability management programs. For best practices in vulnerability management, consider exploring the vulnerability management program design provided by AppSecure.
Furthermore, the continuous evolution of technology necessitates that organizations remain vigilant and proactive in their security measures. Leveraging services such as continuous penetration testing can help identify new vulnerabilities as they arise, ensuring that organizations are not caught off guard.
In conclusion, CVE-2021-37976 is a reminder of the persistent vulnerabilities that exist within widely used applications. Organizations must prioritize their patching efforts and enhance their security strategies to safeguard against potential exploitation.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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