CVE-2016-4232 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 obtain sensitive information from process memory via unspecified vectors.
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Analysis
by VulDB Data Team • 10/04/2024
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 information disclosure vulnerability that enabled remote attackers to extract sensitive data from process memory through unspecified attack vectors. This vulnerability represents a classic example of a memory corruption issue that could be exploited to access confidential information stored within the application's memory space. The flaw allowed attackers to potentially read arbitrary memory locations, which could contain sensitive data such as passwords, encryption keys, session tokens, or other confidential information processed by the Flash Player application. This type of vulnerability falls under the category of information exposure, where the attacker gains unauthorized access to data that should remain protected within the application's memory boundaries. The vulnerability is particularly concerning because Flash Player was widely deployed across multiple operating systems and platforms, making it an attractive target for attackers seeking to harvest sensitive information from compromised systems.
The technical implementation of this vulnerability appears to stem from insufficient input validation and memory management practices within the Flash Player runtime environment. Attackers could leverage this weakness to perform memory reads that would normally be restricted, potentially accessing memory regions containing sensitive data from other processes or the application's own internal structures. This memory disclosure capability aligns with common attack patterns described in the attack tree methodology, where information disclosure serves as a precursor to more sophisticated attacks such as privilege escalation or credential theft. The vulnerability's impact is amplified by the widespread use of Flash Player across enterprise and consumer environments, where it often processes sensitive content including web applications, multimedia presentations, and interactive content that may contain confidential information. The attack surface extends across multiple platforms including Windows, OS X, and Linux, demonstrating the cross-platform nature of the flaw and its potential for widespread exploitation.
The operational consequences of this vulnerability extend beyond simple information disclosure, as the extracted memory contents could provide attackers with sufficient information to conduct more advanced attacks. The ability to read process memory enables threat actors to potentially extract encryption keys, user credentials, or other sensitive data that could be used for privilege escalation attacks or to conduct man-in-the-middle operations against network communications. This vulnerability represents a significant risk to organizations that relied heavily on Flash Player for business-critical applications, as attackers could potentially gain access to confidential information processed through Flash-based applications. The flaw demonstrates the importance of proper memory management and input validation in application security, particularly for widely deployed software components like media players that handle diverse content types and maintain persistent memory structures. Organizations with legacy Flash content deployments faced increased risk of data breaches, as the vulnerability could be exploited through web-based attacks without requiring special privileges or physical access to target systems.
Mitigation strategies for this vulnerability centered on immediate patch deployment and the implementation of additional security controls to reduce the attack surface. Organizations should have prioritized updating Flash Player installations to the latest patched versions, which addressed the memory disclosure issue through improved input validation and memory access controls. The remediation process required careful consideration of compatibility issues with existing Flash-based applications, as many organizations maintained legacy content that depended on older Flash Player versions. Security teams needed to implement network monitoring and anomaly detection to identify potential exploitation attempts, while also considering the broader implications for endpoint security management. This vulnerability highlighted the importance of maintaining up-to-date software components and implementing robust patch management processes, as the delayed response to such vulnerabilities often resulted in widespread exploitation. The incident reinforced industry best practices for application security and demonstrated the critical need for organizations to maintain comprehensive inventory management of all deployed software components, including those that may be considered legacy or deprecated but continue to pose security risks.