CVE-2017-11292 in Flash Player
Summary
by MITRE
Adobe Flash Player version 27.0.0.159 and earlier has a flawed bytecode verification procedure, which allows for an untrusted value to be used in the calculation of an array index. This can lead to type confusion, and successful exploitation could lead to arbitrary code execution.
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Analysis
by VulDB Data Team • 02/05/2025
Adobe Flash Player contains a critical vulnerability in its bytecode verification mechanism that enables attackers to manipulate array indexing operations through untrusted input values. This flaw exists in versions 27.0.0.159 and earlier, where the verification process fails to properly validate array index calculations, creating opportunities for type confusion attacks. The vulnerability stems from insufficient bounds checking during bytecode execution, allowing malicious actors to craft inputs that bypass normal validation procedures and manipulate memory operations. When Flash Player processes malformed bytecode containing crafted array index values, it can inadvertently execute code in unintended memory locations, potentially leading to complete system compromise. This issue represents a classic example of a memory corruption vulnerability that leverages the inherent complexity of virtual machine execution environments. The flaw directly relates to CWE-129, which addresses insufficient input validation, and CWE-131, covering incorrect calculation of buffer or array bounds. From an operational perspective, this vulnerability enables attackers to perform arbitrary code execution remotely, making it particularly dangerous in web-based attack scenarios where Flash content is frequently encountered. The exploitation chain typically involves crafting malicious SWF files that trigger the vulnerable verification path, followed by memory manipulation techniques that leverage the type confusion to gain control over program execution flow. Security researchers have mapped this vulnerability to ATT&CK technique T1059.007, which covers scripting languages, as attackers often utilize Flash-based exploits to deliver malicious payloads through web browsers. The impact extends beyond simple code execution to include potential privilege escalation and persistent system compromise, as attackers can leverage the Flash Player's runtime environment to establish footholds within target systems. Organizations must implement immediate mitigation strategies including disabling Flash Player plugins, applying security patches, and monitoring for suspicious SWF file downloads or execution patterns. The vulnerability underscores the importance of robust bytecode verification mechanisms and highlights the ongoing challenges in securing complex virtual machine environments where multiple layers of abstraction can create unexpected attack surfaces. This flaw demonstrates how seemingly minor verification oversights in multimedia frameworks can translate into severe security implications, particularly in environments where Flash Player remains widely deployed despite its known security risks.