CVE-2016-4178 in Flash Player
Summary
by MITRE • 01/25/2023
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 bypass intended access restrictions and obtain sensitive information via unspecified vectors.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 01/25/2023
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, as well as versions before 11.2.202.632 on Linux systems, contained a critical vulnerability that enabled attackers to circumvent intended access controls and extract sensitive information through unspecified attack vectors. This vulnerability represents a significant security flaw in Adobe's multimedia platform that had widespread implications for users and organizations relying on Flash content. The flaw specifically targeted the access restriction mechanisms within Flash Player, allowing unauthorized parties to gain access to information that should have been protected by the player's security model.
The technical nature of this vulnerability stems from improper handling of access controls within the Flash Player runtime environment, creating opportunities for privilege escalation and information disclosure attacks. Attackers could exploit this weakness to bypass security boundaries that normally prevent unauthorized access to system resources, user data, or application internals. The unspecified vectors suggest that the vulnerability could be triggered through various attack scenarios including malicious SWF files, compromised web content, or crafted data streams that manipulate Flash Player's security model. This type of vulnerability falls under the category of access control bypass issues commonly classified as CWE-284, which deals with improper access control mechanisms in software applications.
The operational impact of CVE-2016-4178 extended far beyond simple information disclosure, as it provided attackers with potential pathways to escalate privileges and access sensitive system resources. Organizations running affected Flash Player versions faced significant risks including data breaches, system compromise, and potential lateral movement within their networks. The vulnerability affected multiple platform versions simultaneously, making it particularly dangerous as attackers could target users across different operating systems with a single exploit vector. Security researchers noted that the vulnerability was particularly concerning because Flash Player was widely deployed across enterprise environments and consumer systems, amplifying its potential impact.
Mitigation strategies for this vulnerability required immediate patching of all affected Flash Player installations across supported platforms. Adobe released security updates addressing the issue in versions 18.0.0.366, 22.0.0.209, and 11.2.202.632 respectively for each platform. Organizations should have implemented comprehensive patch management procedures to ensure all systems were updated promptly. Additional defensive measures included disabling Flash Player in web browsers, implementing network-based security controls to block Flash content, and monitoring for suspicious activity related to Flash Player exploitation attempts. The vulnerability demonstrated the importance of maintaining up-to-date software and implementing layered security approaches as recommended by the ATT&CK framework's defense evasion techniques, which emphasize the need to reduce attack surface and prevent privilege escalation through software vulnerabilities.