CVE-2016-4225 in Flash Player
Summary
by MITRE • 01/26/2023
Adobe Flash Player before 18.0.0.366 and 19.x through 22.x before 22.0.0.209 on Windows and OS X and before 11.2.202.632 on Linux allows attackers to execute arbitrary code by leveraging an unspecified "type confusion," a different vulnerability than CVE-2016-4223 and CVE-2016-4224.
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Analysis
by VulDB Data Team • 01/26/2023
Adobe Flash Player versions prior to 18.0.0.366 and 19.x through 22.x before 22.0.0.209 on Windows and OS X platforms, along with versions before 11.2.202.632 on Linux systems, contained a critical type confusion vulnerability that enabled remote code execution. This flaw represents a fundamental issue in the player's memory management and object handling mechanisms, where the software failed to properly validate data types during runtime operations. The vulnerability specifically manifested when the Flash Player processed certain malformed or crafted input data, causing the application to incorrectly interpret memory locations and execute malicious code with the privileges of the running Flash process.
The technical nature of this type confusion vulnerability falls under the common weakness enumeration CWE-468, which describes improper handling of type confusion scenarios in programming environments. This particular flaw allowed attackers to manipulate the Flash Player's internal data structures by exploiting how the application managed object references and memory allocation patterns. The vulnerability was distinct from related issues CVE-2016-4223 and CVE-2016-4224, indicating separate code paths and implementation flaws within the Flash Player's runtime engine. Attackers could leverage this vulnerability through malicious web content or specially crafted files that would trigger the flawed type handling mechanism when processed by the vulnerable Flash Player version.
The operational impact of this vulnerability was severe and far-reaching, as it provided attackers with a reliable method for achieving arbitrary code execution on targeted systems. The attack typically occurred when users visited compromised websites or opened malicious documents containing embedded Flash content, making it particularly dangerous in enterprise environments where users frequently encountered untrusted web content. Successful exploitation could result in complete system compromise, allowing attackers to install malware, steal sensitive data, or establish persistent backdoors. The vulnerability's presence in widely deployed Flash Player versions meant that a substantial number of systems were potentially at risk, particularly in environments where Flash content remained active despite the platform's declining support.
Mitigation strategies for this vulnerability centered on immediate patching and system hardening measures. Organizations should have prioritized updating all affected Flash Player installations to the latest versions that contained the necessary security fixes. Additional protective measures included implementing content filtering solutions to block Flash content, disabling Flash Player in web browsers, and deploying network-based intrusion detection systems to monitor for exploitation attempts. The vulnerability highlighted the importance of maintaining up-to-date software and implementing defense-in-depth strategies, as the attack surface for Flash-based exploits remained significant even after patching. Security teams should have also considered implementing application whitelisting policies to prevent execution of unauthorized Flash content and established monitoring procedures to detect potential exploitation attempts through anomalous memory access patterns or unexpected process behaviors.
The vulnerability demonstrated the persistent risks associated with legacy software platforms and the challenges of maintaining security for widely used but increasingly deprecated technologies. It underscored the importance of transitioning away from Flash-based content and implementing modern web standards that provide better security guarantees. This particular flaw served as a reminder of the critical need for continuous security assessments and the importance of maintaining comprehensive software inventory management to identify and remediate vulnerable components across enterprise environments. The incident also highlighted how vulnerabilities in multimedia frameworks could provide attackers with sophisticated attack vectors that bypassed traditional security controls and required specialized defensive measures to address effectively.