CVE-2016-4196 in Acrobat Reader
Summary
by MITRE
Adobe Reader and Acrobat before 11.0.17, Acrobat and Acrobat Reader DC Classic before 15.006.30198, and Acrobat and Acrobat Reader DC Continuous before 15.017.20050 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-2016-4191, CVE-2016-4192, CVE-2016-4193, CVE-2016-4194, CVE-2016-4195, CVE-2016-4197, CVE-2016-4198, CVE-2016-4199, CVE-2016-4200, CVE-2016-4201, CVE-2016-4202, CVE-2016-4203, CVE-2016-4204, CVE-2016-4205, CVE-2016-4206, CVE-2016-4207, CVE-2016-4208, CVE-2016-4211, CVE-2016-4212, CVE-2016-4213, CVE-2016-4214, CVE-2016-4250, CVE-2016-4251, CVE-2016-4252, and CVE-2016-4254.
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Analysis
by VulDB Data Team • 09/02/2022
Adobe Reader and Acrobat products have long been prime targets for cyber adversaries due to their widespread deployment and the privileged execution environment they provide. This particular vulnerability affects multiple versions of Adobe's document processing software across different platforms, creating a substantial attack surface that spans both legacy and modern iterations of the software suite. The vulnerability resides in the handling of unspecified vectors within the application's memory management systems, making it particularly dangerous as it can be exploited through various attack paths that are not fully enumerated in the initial disclosure. The memory corruption aspect of this vulnerability aligns with common exploitation patterns found in software security flaws, where improper memory handling creates opportunities for attackers to manipulate program execution flow.
The technical nature of this vulnerability manifests as a memory corruption issue that can be leveraged to achieve arbitrary code execution or cause denial of service conditions. Memory corruption vulnerabilities typically arise when applications fail to properly validate input data or manage memory allocation and deallocation processes. In the context of Adobe Reader and Acrobat, this flaw likely occurs during the parsing or rendering of PDF documents, where malformed or specially crafted input can trigger buffer overflows, use-after-free conditions, or other memory management errors. These conditions create opportunities for attackers to inject malicious code that executes within the application's memory space, potentially escalating privileges or gaining full system control.
The operational impact of this vulnerability extends far beyond individual user systems, as Adobe Reader and Acrobat are deployed across enterprise environments, government agencies, and critical infrastructure organizations. Attackers exploiting this vulnerability could potentially compromise entire networks through targeted attacks on specific individuals or organizations, especially when combined with social engineering tactics such as phishing campaigns. The fact that this vulnerability affects both Windows and OS X platforms indicates a comprehensive flaw in the application's cross-platform implementation, suggesting that the underlying memory management issues are not platform-specific but rather stem from fundamental design or implementation problems in the core document processing libraries. This cross-platform nature makes the vulnerability particularly concerning for organizations with mixed operating system environments.
Mitigation strategies for this vulnerability require a multi-layered approach that combines immediate patching with defensive measures. Organizations should prioritize updating to the latest versions of Adobe Reader and Acrobat as soon as possible, specifically targeting the versions mentioned in the advisory that address this particular memory corruption issue. Network segmentation and application whitelisting can provide additional defense-in-depth measures, while monitoring for unusual network activity or system behavior can help detect exploitation attempts. The vulnerability's classification as a memory corruption issue places it within the purview of common exploit frameworks and attack methodologies, making it susceptible to automated exploitation tools that have been developed by both nation-state actors and criminal organizations. Security teams should also implement regular vulnerability assessments and penetration testing to identify similar flaws in other software applications within their environment.
This vulnerability demonstrates the ongoing challenges in securing complex software applications that process untrusted data, particularly in document processing software where the parsing of user-supplied content must be extremely robust. The existence of multiple related vulnerabilities in the same timeframe suggests that Adobe's document processing engine may have underlying architectural issues that require fundamental redesign or replacement. From a cybersecurity perspective, this vulnerability represents a classic example of how seemingly minor implementation flaws in widely-used software can create significant security risks. The ATT&CK framework would categorize this vulnerability under the T1059.007 technique for Windows Command Shell, as exploitation could enable command execution within the application context, while the CWE classification would likely fall under CWE-125 for out-of-bounds read or CWE-787 for out-of-bounds write conditions that result in memory corruption. Organizations must maintain vigilance against similar vulnerabilities in their software ecosystems and implement comprehensive security practices that include regular patch management, application security testing, and incident response procedures.