CVE-2016-4138 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 • 06/15/2024
Adobe Flash Player versions 21.0.0.242 and earlier contain an unspecified vulnerability that affects the Adobe Flash libraries integrated into Microsoft Internet Explorer 10 and 11 as well as Microsoft Edge browsers. This vulnerability represents a distinct security flaw separate from other issues documented in Microsoft Security Bulletin MS16-083, indicating that the underlying technical weakness operates through different mechanisms or attack surfaces than previously identified vulnerabilities. The unspecified nature of both the impact and attack vectors suggests that this vulnerability could potentially allow for various types of malicious activities including remote code execution, privilege escalation, or information disclosure depending on how the flaw manifests in different operational environments.
The technical implementation of Flash Player within these browser environments creates a complex attack surface where the vulnerability could be exploited through malformed Flash content delivered via web pages or embedded media objects. This type of vulnerability typically arises from memory corruption issues or improper input validation within the Flash Player runtime environment. The fact that this affects multiple Microsoft browsers indicates that the flaw exists within the shared Flash Player library component rather than being specific to individual browser implementations, making the potential attack scope broader across different Microsoft browser versions. This cross-browser impact aligns with common attack patterns documented in the attack technique catalog where adversaries leverage shared components to maximize exploitation efficiency.
From a cybersecurity perspective, this vulnerability represents a critical concern for organizations relying on legacy Flash Player implementations since the affected versions were widely deployed across enterprise environments. The lack of specific details regarding impact and attack vectors makes this particularly dangerous for security teams attempting to assess risk exposure and implement appropriate defensive measures. Organizations may struggle to determine the precise threat model associated with this vulnerability, which complicates incident response planning and security controls implementation. The vulnerability's classification as distinct from MS16-083 suggests that it operates through different exploitation mechanisms, potentially involving memory management flaws or improper handling of Flash content that differs from the previously identified issues.
The operational impact of this vulnerability extends beyond immediate exploitation capabilities to encompass long-term security implications for affected systems. Legacy Flash Player installations continue to pose risks even after the initial vulnerability disclosure, as many organizations maintain these components for backward compatibility reasons. The vulnerability's presence in Microsoft Edge, which was transitioning to a more modern architecture, indicates that even newer browser versions may still be vulnerable if they retain Flash Player compatibility layers. This scenario creates a persistent threat vector that requires comprehensive remediation strategies including complete removal of Flash Player components, browser updates, and implementation of alternative content delivery mechanisms. Security controls should focus on network-based detection of Flash content delivery and application whitelisting policies to prevent execution of vulnerable Flash components.
Mitigation strategies for this vulnerability require immediate attention to remove or disable Flash Player functionality across all affected systems. Organizations should implement comprehensive patch management processes to ensure all Flash Player installations are updated to versions that address this unspecified flaw. The remediation approach should include both automated patch deployment and manual verification procedures to confirm that vulnerable Flash components have been completely removed from systems. Network security controls should be enhanced to detect and block Flash content delivery, particularly in environments where complete removal is not immediately feasible. Additionally, security teams should consider implementing browser hardening measures and content security policies that prevent execution of Flash content from untrusted sources. The vulnerability's classification as distinct from other CVEs suggests that organizations may need to maintain separate tracking and remediation processes for this specific flaw, requiring careful documentation and monitoring to prevent recurrence of exploitation attempts.