CVE-2016-4166 in Flash Player
Summary
by MITRE • 01/25/2023
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 • 10/06/2024
Adobe Flash Player versions 21.0.0.242 and earlier contain an unspecified vulnerability that affects Microsoft Internet Explorer 10 and 11, as well as Microsoft Edge browsers. This vulnerability exists within the Adobe Flash libraries that are integrated into these browser environments, creating a potential attack surface that differs from other vulnerabilities documented in Microsoft Security Bulletin MS16-083. The unspecified nature of this vulnerability means that the exact technical flaw and its corresponding attack vectors have not been publicly disclosed in detail, though the classification suggests it represents a distinct security issue from previously known vulnerabilities. The vulnerability impacts the core Flash Player functionality within these browsers, potentially allowing for remote code execution or other malicious activities when Flash content is processed. This type of vulnerability falls under the broader category of software flaws that can be exploited through web-based attacks, particularly when users interact with malicious Flash content within their browser environment.
The technical implications of this vulnerability are significant given that Flash Player was widely deployed across internet browsers and web applications, making it a prime target for attackers seeking to exploit browser-based security weaknesses. When Flash Player is integrated into browser environments like Internet Explorer and Edge, it creates a complex interaction between the browser's security model and the Flash runtime environment. The vulnerability's classification as distinct from MS16-083 indicates that it likely involves different code paths or attack surfaces within the Flash Player implementation. This suggests that attackers may have found ways to bypass existing security mitigations or exploit previously undiscovered weaknesses in the Flash Player's handling of specific content types or memory management operations. The vulnerability could potentially be triggered through malicious Flash content hosted on compromised websites or delivered through phishing attacks that trick users into executing malicious Flash code.
The operational impact of this vulnerability extends beyond simple exploitation as it represents a fundamental security weakness in widely used browser components. Organizations relying on Internet Explorer 10 and 11, or Microsoft Edge browsers with Flash support, face potential risks including unauthorized access, data breaches, or system compromise through successful exploitation attempts. The attack vectors for this vulnerability could include drive-by downloads, malicious websites containing compromised Flash content, or social engineering campaigns designed to encourage users to interact with malicious Flash applications. This vulnerability aligns with common attack patterns documented in the attack mitigation framework, particularly those involving browser-based exploitation techniques and the abuse of trusted software components. The lack of specific details about the vulnerability's nature makes it particularly concerning as security teams cannot fully assess the risk or implement targeted mitigations without complete information about the underlying flaw.
Mitigation strategies for this vulnerability should focus on immediate remediation through software updates and patches provided by Adobe and Microsoft. Organizations should prioritize disabling Flash Player functionality in browsers where it is not strictly required, as this represents a fundamental security reduction approach. Security teams should implement network-level controls to block Flash content delivery and monitor for suspicious Flash-related activity in network traffic. The vulnerability demonstrates the importance of maintaining updated software components and the risks associated with legacy browser technologies that continue to receive security updates. Security controls should also include user education about the dangers of interacting with untrusted Flash content and the implementation of browser security policies that restrict Flash execution. This vulnerability serves as a reminder of the broader security challenges associated with multimedia plugins and the need for comprehensive security approaches that address both application-level and browser-level vulnerabilities. The incident underscores the necessity of following security best practices such as the principle of least privilege and maintaining up-to-date security controls to prevent exploitation of known and unknown vulnerabilities in widely deployed software components.