CVE-2016-4131 in Flash Player
Summary
by MITRE
Unspecified vulnerability in Adobe Flash Player 21.0.0.242 and earlier, as used in the Adobe Flash libraries in Microsoft Internet Explorer 10 and 11 and Microsoft Edge, has unknown impact and attack vectors, a different vulnerability than other CVEs listed in MS16-083.
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Analysis
by VulDB Data Team • 08/24/2022
Adobe Flash Player version 21.0.0.242 and earlier contains an unspecified vulnerability that affects Microsoft Internet Explorer 10 and 11, as well as Microsoft Edge browsers through their embedded Flash libraries. This vulnerability represents a distinct security flaw separate from other issues documented in Microsoft Security Bulletin MS16-083, indicating that it operates through different attack vectors and mechanisms than previously identified weaknesses. The unspecified nature of the vulnerability means that while the exact technical details remain undisclosed, the presence of such a flaw in the widely used Flash Player component creates significant security concerns for users of affected browsers and operating systems.
The technical implementation of this vulnerability within Flash Player likely involves memory corruption issues or code execution flaws that can be triggered through maliciously crafted web content. Given that Flash Player was commonly integrated into web browsers as a plugin, attackers could potentially exploit this weakness by delivering malicious Flash content through compromised websites or email attachments. The vulnerability's presence in both Internet Explorer 10 and 11, along with Microsoft Edge, suggests it operates at a fundamental level within the browser's rendering engine or Flash plugin architecture. This type of vulnerability typically falls under CWE-119 which deals with weaknesses in memory management, or potentially CWE-787 which addresses out-of-bounds write vulnerabilities.
The operational impact of this vulnerability extends beyond simple browser exploitation as it affects multiple Microsoft browser platforms simultaneously, creating a widespread attack surface for threat actors. Organizations and individual users running affected versions of Internet Explorer and Edge would be at risk of remote code execution attacks, privilege escalation, or information disclosure depending on how the vulnerability manifests. The fact that this vulnerability exists in the Flash libraries embedded within these browsers means that traditional web security measures might not adequately protect against it, as the attack occurs at a deeper level within the browser architecture. This creates challenges for network defenders who must account for Flash-based exploits in their security monitoring and incident response procedures.
Mitigation strategies for this vulnerability should focus on immediate remediation through Adobe Flash Player updates, as well as broader browser security measures. Organizations should prioritize patching affected systems and consider implementing browser security policies that restrict Flash content execution or disable it entirely where possible. The vulnerability's classification as a separate issue from MS16-083 indicates that traditional Microsoft security updates may not address this specific weakness, requiring targeted Adobe security patches. Security teams should also implement network monitoring for suspicious Flash-related traffic and consider using web application firewalls or content filtering solutions to prevent access to potentially malicious Flash content. Additionally, the use of modern browser security features such as sandboxing and strict content security policies can help reduce the attack surface and limit potential exploitation of this vulnerability through browser-based attacks.
The vulnerability's classification and the lack of detailed technical information in the CVE description suggest that this represents a critical security concern that required immediate attention from both Adobe and Microsoft security teams. This type of issue demonstrates the complex security landscape that existed during the period when Flash Player was widely deployed, where vulnerabilities in third-party components could significantly impact the security posture of major browser platforms. The distinction from other CVEs in MS16-083 indicates that this vulnerability required specific remediation approaches rather than general browser security updates, highlighting the need for comprehensive vulnerability management strategies that account for both first-party and third-party software components.