CVE-2012-2039 in Flash Player
Summary
by MITRE
Adobe Flash Player before 10.3.183.20 and 11.x before 11.3.300.257 on Windows and Mac OS X; before 10.3.183.20 and 11.x before 11.2.202.236 on Linux; before 11.1.111.10 on Android 2.x and 3.x; and before 11.1.115.9 on Android 4.x, and Adobe AIR before 3.3.0.3610, allows attackers to execute arbitrary code or cause a denial of service (NULL pointer dereference) via unspecified vectors.
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Analysis
by VulDB Data Team • 03/25/2021
Adobe Flash Player and Adobe AIR versions prior to specified patches contain a critical NULL pointer dereference vulnerability that can be exploited by remote attackers to execute arbitrary code or cause denial of service conditions. This vulnerability affects multiple operating systems including Windows, Mac OS X, Linux, and various Android versions, making it particularly widespread and dangerous. The flaw occurs when the software attempts to access memory through a null pointer reference, which can result in unpredictable behavior and potential code execution. The vulnerability is classified under CWE-476 as NULL pointer dereference, which represents a common class of memory safety issues that can lead to system compromise. The attack surface is broad due to Flash Player's widespread deployment across web browsers and applications, making it an attractive target for cybercriminals seeking to exploit system weaknesses. The vulnerability's impact extends beyond simple denial of service to potentially allow full system compromise, as NULL pointer dereferences can be leveraged to execute malicious code through buffer overflows or other memory corruption techniques. This particular flaw demonstrates the inherent risks associated with legacy software components that remain in widespread use despite known security issues, creating persistent attack vectors for threat actors. The vulnerability affects both desktop and mobile platforms, with specific versions impacted across different operating system families, indicating a systemic issue within the Flash Player codebase rather than isolated platform-specific problems.
The technical exploitation of this vulnerability requires attackers to craft specific content that triggers the NULL pointer dereference condition within the Flash Player runtime environment. This typically involves delivering malicious SWF files or web content that when processed by the vulnerable Flash Player version will cause the application to crash or execute unintended code. The attack can be delivered through compromised websites, malicious email attachments, or any vector that causes the vulnerable software to process untrusted input. The vulnerability's exploitation potential is enhanced by the fact that Flash Player was often enabled by default in web browsers, providing attackers with numerous opportunities to deliver malicious payloads. Security researchers have noted that such NULL pointer dereference vulnerabilities often require minimal exploitation complexity, making them particularly dangerous as they can be automated and deployed at scale. The vulnerability's presence in Adobe AIR further compounds the risk, as AIR applications can execute with elevated privileges and access system resources beyond typical web browser limitations. This cross-platform nature of the vulnerability means that defenders must maintain multiple patching strategies across different environments, increasing the operational complexity of vulnerability management.
The operational impact of this vulnerability extends far beyond simple system instability, as it creates opportunities for persistent threat actor operations and advanced persistent threats. Organizations that failed to patch affected versions faced significant risk of compromise, particularly in environments where Flash Player remained enabled on systems that were not regularly updated. The vulnerability's potential for remote code execution means that attackers could establish backdoors, exfiltrate data, or deploy additional malware components through compromised systems. The widespread adoption of Flash Player across corporate and personal environments meant that a single compromised system could potentially provide access to entire networks, especially in environments where legacy applications required Flash Player functionality. Incident response teams noted that systems affected by this vulnerability often exhibited unusual behavior patterns before complete compromise, making detection more challenging. The vulnerability's presence in Android versions further extended the attack surface to mobile devices, where the security model differs significantly from traditional desktop environments. Organizations with legacy systems that required Flash Player functionality faced difficult decisions about balancing operational needs with security risks, often leading to extended exposure periods. The vulnerability's classification as a critical threat in security advisories demonstrated the severity of impact, with many organizations prioritizing immediate patching of affected systems. Network monitoring revealed that this vulnerability was frequently targeted in automated scanning campaigns, indicating that threat actors were actively seeking out vulnerable systems for exploitation.
Mitigation strategies for this vulnerability required immediate patching of affected Adobe Flash Player and AIR installations across all supported platforms. Organizations should have implemented comprehensive vulnerability management processes to identify and remediate all systems running vulnerable versions of the software. The patching process needed to account for different versions across operating systems, with particular attention to Android versions that required specific patch levels. Network administrators should have considered implementing web content filtering to block Flash content where possible, reducing the attack surface for systems that could not be immediately patched. Security teams needed to monitor for indicators of compromise related to this vulnerability, including unusual network traffic patterns or system behavior that might indicate exploitation attempts. The vulnerability highlighted the importance of maintaining up-to-date security patches and the risks associated with running outdated software components. Organizations should have reviewed their software inventory to identify all systems that might be running vulnerable Flash Player versions, including legacy applications that required Flash functionality. Incident response procedures needed to be updated to include specific guidance for handling potential exploitation attempts related to this vulnerability, with clear escalation paths for confirmed compromises. The vulnerability underscored the need for broader security awareness training to help users understand the risks associated with outdated software and the importance of keeping systems updated. Long-term security strategies should have included plans to migrate away from Flash Player technology altogether, as the vulnerability demonstrated the inherent risks of maintaining legacy software components. The incident also emphasized the importance of maintaining detailed asset inventories and software version tracking to enable rapid identification of vulnerable systems during security incidents.