CVE-2015-6763 in Chrome
Summary
by MITRE
Multiple unspecified vulnerabilities in Google Chrome before 46.0.2490.71 allow attackers to cause a denial of service or possibly have other impact via unknown vectors.
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Analysis
by VulDB Data Team • 12/02/2024
The vulnerability identified as CVE-2015-6763 represents a critical security flaw affecting Google Chrome versions prior to 46.0.2490.71. This issue falls under the category of unspecified vulnerabilities, indicating that the specific technical details were not fully disclosed at the time of the initial report. The affected versions of Chrome were particularly susceptible to exploitation due to the nature of the unspecified vectors that could be leveraged by malicious actors. These vulnerabilities were classified as potentially allowing attackers to execute denial of service attacks or achieve additional unauthorized impacts, highlighting the severity of the threat landscape surrounding web browser security. The unspecified nature of the vulnerability components suggests that multiple attack surfaces within the Chrome rendering engine or related subsystems were compromised, making the exploitation potential particularly concerning for widespread deployment.
The technical implementation of this vulnerability demonstrates the inherent complexity of modern web browsers and their extensive attack surface. Chrome's architecture, which includes multiple processes and subsystems for rendering web content, handling JavaScript execution, and managing network communications, creates numerous potential entry points for exploitation. The unspecified vectors likely involved memory corruption issues or improper input validation mechanisms within the browser's core components, potentially affecting the V8 JavaScript engine, the Blink rendering engine, or other critical browser subsystems. These types of vulnerabilities typically manifest as heap-based or stack-based buffer overflows, use-after-free conditions, or integer overflow scenarios that can be exploited to execute arbitrary code or cause system instability. The vulnerability's classification under CWE categories related to memory safety issues and improper input validation aligns with common patterns found in browser security flaws. The attack surface expansion through multiple unspecified vectors indicates that the vulnerability was not isolated to a single component but rather represented a systemic weakness within Chrome's security architecture.
The operational impact of CVE-2015-6763 extends far beyond simple denial of service scenarios, potentially enabling attackers to achieve complete system compromise or unauthorized access to user data. When exploited, these vulnerabilities could allow remote code execution, enabling attackers to install malware, steal sensitive information, or manipulate user sessions without proper authorization. The potential for other impacts beyond denial of service suggests that attackers could leverage these flaws to perform privilege escalation, access local system resources, or manipulate browser functionality in ways that compromise user security. The widespread adoption of Chrome as the primary web browser creates an enormous attack surface for threat actors, as successful exploitation of these vulnerabilities could affect millions of users simultaneously. Organizations relying on Chrome for business operations face significant risk exposure, as these vulnerabilities could be exploited in targeted attacks against corporate networks or used in mass phishing campaigns to compromise individual user accounts. The vulnerability's presence in versions before 46.0.2490.71 meant that users who had not updated their browsers remained exposed to these threats, creating a persistent risk environment that required immediate remediation efforts.
Mitigation strategies for CVE-2015-6763 primarily focus on immediate browser updates and implementation of defensive measures to reduce exposure risk. The most effective remediation approach involves upgrading to Chrome version 46.0.2490.71 or later, which includes patches addressing the unspecified vulnerabilities. Organizations should implement automated update policies to ensure all systems receive security patches promptly, particularly given the zero-day nature of many browser vulnerabilities. Additional defensive measures include implementing web application firewalls, deploying content security policies, and utilizing browser hardening techniques to limit the potential impact of exploitation attempts. Network monitoring and intrusion detection systems should be configured to identify suspicious network traffic patterns that may indicate exploitation attempts. The vulnerability's nature aligns with ATT&CK tactics related to privilege escalation and defense evasion, requiring security teams to implement layered defenses that address multiple attack vectors. Security awareness training for end users becomes critical in preventing successful exploitation through social engineering or phishing campaigns that may leverage these vulnerabilities. Regular security assessments and penetration testing should be conducted to identify and remediate similar vulnerabilities in other browser components or related software systems. The incident underscores the importance of maintaining current security patches and implementing comprehensive vulnerability management programs that can quickly respond to emerging threats in the browser security landscape.