CVE-2011-0565 in Acrobat Reader
Summary
by MITRE
Unspecified vulnerability in Adobe Reader and Acrobat 10.x before 10.0.1, 9.x before 9.4.2, and 8.x before 8.2.6 on Windows and Mac OS X allows attackers to cause a denial of service or possibly execute arbitrary code via unknown vectors, a different vulnerability than CVE-2011-0585.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 10/16/2021
Adobe Reader and Acrobat versions prior to specific patch levels contain an unspecified vulnerability that represents a critical security flaw affecting both Windows and Mac OS X operating systems. This vulnerability exists within the software's handling of certain input data or processing routines that are not explicitly detailed in the public CVE description. The affected versions include Adobe Reader 10.x before 10.0.1, 9.x before 9.4.2, and 8.x before 8.2.6, indicating this issue spans multiple major release lines and has persisted across significant software iterations. The vulnerability category falls under the broader classification of unspecified flaws that can lead to either denial of service conditions or potential arbitrary code execution, making it particularly dangerous for enterprise and individual users who rely on these applications for document processing. The distinction from CVE-2011-0585 indicates this represents a separate attack surface within the same software family, suggesting that multiple attack vectors exist within the Adobe Acrobat ecosystem.
The technical nature of this vulnerability appears to stem from inadequate input validation or memory management within the Adobe Reader and Acrobat applications. Attackers can exploit this weakness through unspecified vectors that likely involve malformed or specially crafted PDF files or document elements that trigger unexpected behavior in the application's processing engine. The vulnerability's potential for arbitrary code execution places it in the category of remote code execution flaws, which can be particularly devastating when combined with other exploitation techniques. The unspecified nature of the attack vectors suggests that the underlying flaw may involve multiple components within the software architecture, potentially including parsing routines, memory handling functions, or component interaction mechanisms that do not properly validate or sanitize input data before processing. This type of vulnerability is often classified as a buffer overflow or memory corruption issue, though the exact technical implementation remains unspecified in the public record.
The operational impact of this vulnerability extends beyond simple denial of service conditions to potentially enable full system compromise when exploited successfully. Organizations using affected versions of Adobe Reader and Acrobat face significant risk of unauthorized code execution on user systems, which could lead to data breaches, system infiltration, or complete loss of system control. The vulnerability affects users across multiple operating systems, indicating that attackers can leverage this weakness regardless of platform choice, which increases the attack surface and exploitation potential. Given that Adobe Reader and Acrobat are widely deployed applications, the impact of exploitation could be extensive, affecting enterprise networks, government agencies, and individual users who frequently process PDF documents. The vulnerability's presence in multiple version streams suggests that the underlying flaw may be deeply embedded within the software architecture, making it difficult to patch without comprehensive application updates.
Mitigation strategies for this vulnerability require immediate implementation of security patches and updates from Adobe, specifically targeting the affected version ranges mentioned in the CVE description. Organizations should prioritize updating all affected systems to the latest available versions, ensuring that the patches address the specific vulnerability without introducing compatibility issues. The recommended approach involves implementing a comprehensive patch management process that includes testing patches in controlled environments before widespread deployment. Security teams should also consider implementing additional protective measures such as sandboxing PDF processing, restricting Adobe Reader functionality, and monitoring for suspicious document processing activities. Network-level protections including email filtering and web proxy configurations can help reduce the likelihood of exploitation by blocking potentially malicious PDF content from entering the organization. The vulnerability's classification as a remote code execution flaw necessitates immediate action, as attackers could potentially exploit this weakness without user interaction, making it particularly dangerous in environments where users process untrusted PDF documents. This vulnerability aligns with common attack patterns documented in the ATT&CK framework under initial access and execution techniques, specifically targeting software exploitation methods that leverage known vulnerabilities in widely used applications.