CVE-2016-1063 in Acrobat Reader
Summary
by MITRE
Adobe Reader and Acrobat before 11.0.16, Acrobat and Acrobat Reader DC Classic before 15.006.30172, and Acrobat and Acrobat Reader DC Continuous before 15.016.20039 on Windows and OS X allow attackers to execute arbitrary code or cause a denial of service (memory corruption) via unspecified vectors, a different vulnerability than CVE-2016-1037, CVE-2016-1064, CVE-2016-1071, CVE-2016-1072, CVE-2016-1073, CVE-2016-1074, CVE-2016-1076, CVE-2016-1077, CVE-2016-1078, CVE-2016-1080, CVE-2016-1081, CVE-2016-1082, CVE-2016-1083, CVE-2016-1084, CVE-2016-1085, CVE-2016-1086, CVE-2016-1088, CVE-2016-1093, CVE-2016-1095, CVE-2016-1116, CVE-2016-1118, CVE-2016-1119, CVE-2016-1120, CVE-2016-1123, CVE-2016-1124, CVE-2016-1125, CVE-2016-1126, CVE-2016-1127, CVE-2016-1128, CVE-2016-1129, CVE-2016-1130, CVE-2016-4088, CVE-2016-4089, CVE-2016-4090, CVE-2016-4093, CVE-2016-4094, CVE-2016-4096, CVE-2016-4097, CVE-2016-4098, CVE-2016-4099, CVE-2016-4100, CVE-2016-4101, CVE-2016-4103, CVE-2016-4104, and CVE-2016-4105.
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Analysis
by VulDB Data Team • 10/20/2024
Adobe Reader and Acrobat products have long been prime targets for cyber attackers due to their widespread use and the complex nature of PDF processing. This particular vulnerability affects multiple versions of Adobe's flagship software across different operating systems, creating a significant attack surface that spans both legacy and modern deployment scenarios. The vulnerability resides in the parsing and handling of PDF documents, specifically within memory management functions that process embedded objects and streams. Attackers can exploit this weakness by crafting malicious PDF files that trigger memory corruption during document rendering, potentially leading to arbitrary code execution or system crashes. The vulnerability's classification as a memory corruption issue aligns with common attack patterns targeting software components that handle untrusted input data, making it particularly dangerous in enterprise environments where PDF documents are frequently exchanged. The affected versions include both traditional Acrobat and Reader releases as well as the newer DC Classic and Continuous editions, indicating this is a persistent flaw that has affected Adobe's product lineage over several years.
The technical nature of this vulnerability involves improper memory handling during PDF document processing, where the software fails to properly validate or sanitize input data before allocating memory for processing. This memory corruption can manifest in various forms including buffer overflows, use-after-free conditions, or heap corruption scenarios that allow attackers to manipulate program execution flow. The unspecified vectors mentioned in the description suggest that multiple attack paths exist, potentially involving different PDF elements such as embedded JavaScript, XObjects, or complex graphics processing instructions. These attack vectors often leverage the inherent complexity of PDF specifications where legitimate document features can be abused to trigger memory corruption conditions. The vulnerability's impact extends beyond simple exploitation as it can also cause denial of service conditions that render the application unusable, effectively creating a persistent availability threat for affected systems. Security researchers have noted that such memory corruption vulnerabilities are particularly challenging to defend against because they often require sophisticated exploitation techniques that can bypass traditional security controls.
The operational impact of this vulnerability is substantial for organizations relying on Adobe Reader and Acrobat for document processing, as it creates multiple entry points for attackers to compromise systems. The vulnerability affects both Windows and OS X operating systems, demonstrating the cross-platform nature of the threat and the need for comprehensive security coverage across all endpoints. Organizations that process large volumes of PDF documents, including financial institutions, government agencies, and healthcare providers, face particular risk as these environments often contain sensitive data that attackers could target. The vulnerability's presence in both legacy and newer product versions means that organizations cannot simply upgrade to the latest release to resolve the issue, as many systems may be running older versions due to compatibility requirements or deployment constraints. This creates a prolonged exposure window where organizations must carefully balance security updates with operational stability, often requiring complex patch management processes and potentially impacting business continuity.
Mitigation strategies for this vulnerability should encompass multiple layers of defense to address both immediate exposure and long-term security posture improvement. Organizations should implement strict PDF document filtering at network boundaries, using content inspection tools to identify and block potentially malicious PDF files before they reach end-user systems. Application whitelisting and sandboxing approaches can provide additional protection by limiting the execution environment of PDF documents and preventing exploitation attempts from affecting the underlying operating system. Regular security updates and patch management processes must be prioritized, though organizations should test patches thoroughly to avoid disrupting critical business operations. The vulnerability's classification as a memory corruption issue places it within the scope of common exploit mitigation techniques such as address space layout randomization and data execution prevention, though these controls may not be sufficient to prevent all exploitation attempts. Security teams should also implement monitoring and alerting for suspicious PDF processing activities, as well as conduct regular vulnerability assessments to identify systems that may still be exposed to this or similar memory corruption vulnerabilities.
This vulnerability aligns with several established cybersecurity frameworks and threat models, including the Common Weakness Enumeration classification for memory safety issues and the attack patterns documented in the MITRE ATT&CK framework. The specific exploitation techniques employed in memory corruption vulnerabilities often map to techniques such as code injection and privilege escalation, making them particularly dangerous in enterprise environments. The vulnerability's impact on widely deployed software like Adobe Reader and Acrobat demonstrates the importance of supply chain security and the need for organizations to maintain visibility into all software components in their environments. Organizations should also consider implementing zero-trust security models that assume no implicit trust in any software component, including legitimate applications that may be exploited through vulnerabilities like this one. The complexity and persistence of such vulnerabilities highlight the ongoing need for security awareness training and incident response preparedness to address the full spectrum of potential exploitation scenarios.