CVE-2019-5786 addresses an object lifetime issue in Blink within Google Chrome versions prior to 72.0.3626.121. This vulnerability allows a remote attacker to potentially perform out-of-bounds memory access via a crafted HTML page, leading to significant security risks. The CVSS score assigned to this vulnerability is 6.5, classified as medium severity, indicating that it poses a moderate threat to users and organizations.
The risk to organizations includes possible disruption of service and unauthorized access to sensitive information. Given the nature of the vulnerability and the ease of exploitation, it is crucial for organizations to address this issue promptly. As of now, there are known exploits available, and this vulnerability has been included in the Known Exploited Vulnerabilities (KEV) catalog.
Organizations should prioritize patching immediately to prevent potential attacks. The vulnerability was published on June 27, 2019, and although it has been analyzed, the potential for exploitation remains a concern.
To mitigate risks, organizations must apply updates as per vendor instructions and continuously monitor for any signs of exploitation.
Vulnerability Details
The vulnerability is characterized as a 'use-after-free' flaw, specifically categorized under CWE-416. The CVSS vector indicates that the attack vector is network-based, with low attack complexity and no privileges required for exploitation. User interaction is required, meaning that a user must navigate to a malicious webpage for the attack to be successful.
Availability impact is classified as high, indicating that the vulnerability could lead to significant service disruptions. Confidentiality and integrity impacts are rated as none, meaning that the primary concern revolves around service availability.
Technical Analysis
The root cause of this vulnerability is an object lifetime issue in the Blink rendering engine of Google Chrome. This flaw allows attackers to manipulate the memory allocation of objects, potentially leading to out-of-bounds memory access. The attack vector is network-based, requiring a user to interact with the attack by visiting a malicious webpage.
The attack complexity is low, meaning that the vulnerability can be exploited without requiring advanced techniques. No privileges are required for exploitation, which increases the risk of widespread attacks. User interaction is required, which may limit the number of successful attacks but still poses a significant risk.
The availability impact being high suggests that successful exploitation could result in a denial of service or application crash, affecting users' ability to access the browser.
Risk & Impact Analysis
Organizations utilizing Google Chrome should recognize the real-world risks associated with CVE-2019-5786. The use-after-free vulnerability can have far-reaching impacts, especially in environments where users frequently interact with untrusted content. The potential for service disruption and compromised user experience underscores the importance of timely remediation.
The urgency for organizations to address this vulnerability is critical, especially given its inclusion in the KEV catalog. Organizations should assess the deployment of affected versions and prioritize patching as part of their security strategy.
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | Yes |
Ransomware Use | No |
Affected Versions
Google Chrome versions prior to 72.0.3626.121 are affected by this vulnerability. Organizations should ensure that all systems are updated to mitigate risks associated with this vulnerability.
Mitigation & Remediation
To mitigate the risks associated with CVE-2019-5786, organizations must apply the latest patches provided by Google. The recommended action is to upgrade to the latest stable version of Google Chrome. If immediate patching is not feasible, organizations should consider implementing network controls to restrict access to potentially harmful content.
Monitoring for unusual behavior and logs related to Chrome usage can also help identify attempts to exploit this vulnerability.
Organizations should validate remediation through penetration testing to ensure all vulnerabilities are addressed.
Detection Guidance
Monitoring for log indicators such as abnormal memory access patterns or crashes in Google Chrome can indicate exploitation attempts. Behavioral anomalies in user interactions with web pages should also be closely observed.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2019-5786 lies in its representation of common vulnerabilities in modern web browsers. This vulnerability highlights the importance of secure coding practices and vigilant testing of rendering engines.
Security teams should take this incident as a lesson to implement thorough training on secure web application design and conduct regular code reviews.
A comprehensive vulnerability management program can help organizations proactively identify and mitigate similar risks in the future.
Regular penetration testing should be part of the security strategy to ensure effective defenses against emerging threats.
Organizations may also benefit from reviewing their API security testing practices to ensure comprehensive coverage.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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