CVE-2015-8434 in Flash Player
Summary
by MITRE
Use-after-free vulnerability in Adobe Flash Player before 18.0.0.268 and 19.x and 20.x before 20.0.0.228 on Windows and OS X and before 11.2.202.554 on Linux, Adobe AIR before 20.0.0.204, Adobe AIR SDK before 20.0.0.204, and Adobe AIR SDK & Compiler before 20.0.0.204 allows attackers to execute arbitrary code via unspecified vectors, a different vulnerability than CVE-2015-8048, CVE-2015-8049, CVE-2015-8050, CVE-2015-8055, CVE-2015-8056, CVE-2015-8057, CVE-2015-8058, CVE-2015-8059, CVE-2015-8061, CVE-2015-8062, CVE-2015-8063, CVE-2015-8064, CVE-2015-8065, CVE-2015-8066, CVE-2015-8067, CVE-2015-8068, CVE-2015-8069, CVE-2015-8070, CVE-2015-8071, CVE-2015-8401, CVE-2015-8402, CVE-2015-8403, CVE-2015-8404, CVE-2015-8405, CVE-2015-8406, CVE-2015-8410, CVE-2015-8411, CVE-2015-8412, CVE-2015-8413, CVE-2015-8414, CVE-2015-8420, CVE-2015-8421, CVE-2015-8422, CVE-2015-8423, CVE-2015-8424, CVE-2015-8425, CVE-2015-8426, CVE-2015-8427, CVE-2015-8428, CVE-2015-8429, CVE-2015-8430, CVE-2015-8431, CVE-2015-8432, CVE-2015-8433, CVE-2015-8435, CVE-2015-8436, CVE-2015-8437, CVE-2015-8441, CVE-2015-8442, CVE-2015-8447, CVE-2015-8448, CVE-2015-8449, CVE-2015-8450, CVE-2015-8452, and CVE-2015-8454.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 11/10/2024
The CVE-2015-8434 vulnerability represents a critical use-after-free flaw in Adobe Flash Player and related technologies that existed across multiple platform versions and software distributions. This vulnerability falls under the broader category of memory safety issues and specifically manifests as a use-after-free condition that occurs when a program continues to reference memory after it has been freed, creating opportunities for arbitrary code execution. The affected software versions include Adobe Flash Player versions prior to 18.0.0.268 and 19.x and 20.x before 20.0.0.228 on Windows and OS X platforms, as well as Adobe AIR versions before 20.0.0.204 and corresponding SDK versions across all supported operating systems. The vulnerability is particularly concerning because it operates across multiple attack surfaces and affects different Adobe products within the same ecosystem, making it a significant target for attackers seeking to exploit Flash Player's widespread deployment in web browsers.
The technical exploitation of this vulnerability involves an attacker crafting malicious content that triggers a specific sequence of operations within the Flash Player runtime environment. When the affected software processes this crafted content, it creates conditions where memory allocated to objects becomes freed while references to those objects remain active. This memory corruption scenario allows attackers to manipulate the program flow by overwriting critical memory locations with malicious code or by controlling the execution path through heap spraying techniques. The vulnerability operates at the core level of Adobe's Flash Player runtime, making it particularly dangerous as it can be leveraged to bypass security mechanisms that are typically effective against other types of exploits. The use-after-free condition typically occurs during object lifecycle management where the program fails to properly track object references and their associated memory allocation status.
The operational impact of CVE-2015-8434 extends far beyond simple code execution capabilities as it represents a sophisticated attack vector that can be weaponized in advanced persistent threat campaigns. This vulnerability enables attackers to gain complete control over affected systems, potentially allowing for data exfiltration, system compromise, and establishment of persistent backdoors. The widespread deployment of Flash Player across enterprise environments and end-user systems created an enormous attack surface for this vulnerability, with many organizations having Flash Player enabled by default in their web browsers. Security researchers have noted that this particular vulnerability was often exploited in the wild through drive-by download attacks, where users would visit compromised websites that delivered malicious Flash content without their knowledge. The vulnerability's exploitation typically required no user interaction beyond visiting a malicious webpage, making it particularly dangerous for end users who might not be aware of the security implications of their browsing activities.
Mitigation strategies for CVE-2015-8434 required immediate action from organizations and users to address the memory safety issue within Adobe's software ecosystem. The primary recommended mitigation was the immediate installation of security patches released by Adobe, which included updated versions of Flash Player, AIR, and related SDK components. Organizations implementing security policies needed to ensure that all systems running affected versions were updated promptly, as the vulnerability could be exploited through various attack vectors including email attachments, compromised websites, and malicious advertisements. The vulnerability also highlighted the importance of application sandboxing and memory protection mechanisms that could help mitigate the impact of such memory corruption flaws. Security professionals often recommended implementing network-based protections such as web application firewalls and content filtering solutions to prevent access to known malicious Flash content. Additionally, the vulnerability underscored the need for regular software updates and security assessments to identify and remediate similar issues before they could be exploited in the wild, aligning with industry best practices defined in standards such as those referenced in the CWE database under use-after-free conditions and the MITRE ATT&CK framework's exploitation techniques.
The vulnerability demonstrates how legacy software components can continue to pose significant security risks even after initial discovery, as the widespread adoption of Flash Player meant that many organizations had difficulty tracking and updating all affected systems. The complexity of the attack surface and the multiple affected versions created challenges for security teams trying to implement comprehensive protection measures. This vulnerability also emphasized the importance of understanding the specific attack patterns and exploitation techniques used by threat actors, as the use-after-free nature of the flaw required sophisticated exploitation methods that could be detected through behavioral monitoring and anomaly detection systems. The remediation process for this vulnerability also highlighted the need for better software lifecycle management and more frequent security assessments of widely deployed applications. Organizations that had already begun migrating away from Flash Player technology were better positioned to avoid this particular vulnerability, demonstrating how modernizing software stacks and reducing dependency on legacy technologies can significantly improve overall security posture.