CVE-2016-4148 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 • 10/05/2024
Adobe Flash Player versions 21.0.0.242 and earlier contained a critical unspecified vulnerability that affected Microsoft Internet Explorer 10 and 11 as well as Microsoft Edge browsers. This vulnerability represented a distinct security flaw separate from other issues addressed in Microsoft Security Bulletin MS16-083, indicating that the vulnerability stemmed from the Flash Player component rather than the browser itself. The unspecified nature of the vulnerability meant that attackers could potentially exploit it through various attack vectors, though the exact methods remained unclear at the time of disclosure. This type of vulnerability typically arises from memory corruption issues, buffer overflows, or improper input validation within the Flash Player runtime environment. The impact of such vulnerabilities can range from remote code execution to privilege escalation, depending on the specific flaw and the execution context. Given that Flash Player was widely deployed across numerous systems and browsers, the potential attack surface was extensive and posed significant security risks to enterprise environments.
The vulnerability's classification within the Common Weakness Enumeration framework would likely fall under weakness categories related to memory safety, input validation, or software quality issues. The attack vectors for such vulnerabilities typically involve malicious web content that triggers the vulnerable Flash Player component when rendered in the affected browsers. Attackers could potentially deliver exploits through compromised websites, malicious advertisements, or phishing campaigns that leverage the Flash Player's runtime environment to execute arbitrary code on targeted systems. The fact that this vulnerability affected multiple Microsoft browsers demonstrated the interconnected nature of web security components and highlighted the importance of maintaining up-to-date Flash Player installations across all supported platforms. Security researchers and threat actors often target such components because they provide a consistent attack surface that can be leveraged across different browser environments, making them particularly valuable for exploit development.
Organizations and security teams needed to prioritize immediate remediation efforts by updating Adobe Flash Player to versions that addressed the vulnerability, while also implementing additional security controls to mitigate potential exploitation attempts. The vulnerability's presence in Microsoft Edge, which was Microsoft's newer browser at the time, indicated that even modern browser implementations could be vulnerable through third-party components like Flash Player. This situation reinforced the importance of browser sandboxing and component isolation techniques that could prevent exploitation of individual components from affecting the broader system. Mitigation strategies included disabling Flash Player in browsers where it was not essential, implementing web application firewalls, and deploying network-based intrusion detection systems to monitor for suspicious Flash-related traffic patterns. The vulnerability also highlighted the need for comprehensive vulnerability management processes that could track and remediate issues across multiple software components within complex enterprise environments.
The security implications of this vulnerability extended beyond immediate exploitation risks to include long-term exposure concerns, as many organizations continued to use outdated Flash Player versions for legacy applications and content. This scenario created persistent security gaps that attackers could leverage for extended periods, particularly in environments where patch management processes were inadequate or delayed. The vulnerability's classification as unspecified meant that security teams had to rely on broader threat intelligence and defensive measures rather than specific exploit mitigations. From an operational perspective, this vulnerability demonstrated the critical importance of maintaining current security patches across all software components, including those that might seem less critical like media players or browser plugins. The incident also underscored the need for regular security assessments and vulnerability scanning to identify outdated components that could serve as attack vectors. Organizations needed to establish robust processes for tracking and remediating vulnerabilities across their entire software ecosystem, including third-party components that could introduce security risks into their environments.