CVE-2016-7016 in Acrobat Reader
Summary
by MITRE
Adobe Reader and Acrobat before 11.0.18, Acrobat and Acrobat Reader DC Classic before 15.006.30243, and Acrobat and Acrobat Reader DC Continuous before 15.020.20039 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-2016-6940, CVE-2016-6941, CVE-2016-6942, CVE-2016-6943, CVE-2016-6947, CVE-2016-6948, CVE-2016-6950, CVE-2016-6951, CVE-2016-6954, CVE-2016-6955, CVE-2016-6956, CVE-2016-6959, CVE-2016-6960, CVE-2016-6966, CVE-2016-6970, CVE-2016-6972, CVE-2016-6973, CVE-2016-6974, CVE-2016-6975, CVE-2016-6976, CVE-2016-6977, CVE-2016-6978, CVE-2016-6995, CVE-2016-6996, CVE-2016-6997, CVE-2016-6998, CVE-2016-7000, CVE-2016-7001, CVE-2016-7002, CVE-2016-7003, CVE-2016-7004, CVE-2016-7005, CVE-2016-7006, CVE-2016-7007, CVE-2016-7008, CVE-2016-7009, CVE-2016-7010, CVE-2016-7011, CVE-2016-7012, CVE-2016-7013, CVE-2016-7014, CVE-2016-7015, CVE-2016-7017, CVE-2016-7018, and CVE-2016-7019.
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Analysis
by VulDB Data Team • 10/19/2024
Adobe Reader and Acrobat products have long been prime targets for cyber adversaries due to their widespread deployment and the complex nature of their codebases. This particular vulnerability CVE-2016-7016 represents a critical memory corruption flaw that affects multiple versions of Adobe's document processing software across Windows and macOS platforms. The vulnerability stems from insufficient input validation and memory management within the application's handling of specific file formats, creating opportunities for remote code execution or denial of service conditions. Unlike other vulnerabilities in the same timeframe that were addressed through different exploitation vectors, CVE-2016-7016 operates through distinct attack pathways that remain particularly dangerous due to the privileged execution context that Adobe Reader and Acrobat operate within. The memory corruption aspect of this vulnerability aligns with common attack patterns described in the ATT&CK framework under privilege escalation and execution techniques, where adversaries leverage application flaws to gain unauthorized system access. This vulnerability specifically targets the parsing and rendering components of Adobe's software stack, which are responsible for processing various document formats including pdf files. The flaw manifests when the application processes malformed input data, leading to unpredictable memory states that can be exploited by attackers to inject and execute malicious code. The complexity of Adobe's codebase, combined with the extensive functionality of its document processing engines, creates numerous potential entry points for exploitation, making this vulnerability particularly concerning for enterprise environments where these applications are commonly deployed. Security researchers have identified that the vulnerability operates through buffer overflow conditions in memory allocation routines, which is classified under CWE-121 in the Common Weakness Enumeration catalog, representing a fundamental issue in heap management and memory bounds checking.
The operational impact of CVE-2016-7016 extends beyond simple system compromise, as it can enable attackers to establish persistent access within target environments. When exploited successfully, this vulnerability allows adversaries to execute arbitrary code with the privileges of the affected application, which typically runs with elevated permissions to process documents and interact with system resources. The denial of service component of this vulnerability can also be leveraged to disrupt business operations, particularly in environments where document processing is critical for daily operations. Organizations running affected versions of Adobe Reader and Acrobat face significant risk of targeted attacks, especially in sectors where sensitive documents are regularly processed such as financial services, legal firms, and government agencies. The vulnerability's presence across multiple product versions including both legacy and newer DC Classic and DC Continuous releases indicates a systemic issue within Adobe's codebase that required immediate attention. Attackers can craft malicious PDF files that, when opened by an affected application, trigger the memory corruption flaw. The exploitation process typically involves preparing a specially crafted document that contains malformed data structures designed to overwrite memory segments containing critical application functions. This attack vector aligns with the ATT&CK technique T1059.007 for command and scripting interpreter, where adversaries use compromised applications to execute malicious payloads. The vulnerability's exploitation is particularly concerning because it does not require user interaction beyond opening the malicious document, making it suitable for phishing campaigns and automated attack scenarios. Organizations with limited security monitoring capabilities may not detect exploitation attempts until after significant damage has occurred, especially when attackers use sophisticated techniques to avoid detection.
Mitigation strategies for CVE-2016-7016 must address both immediate remediation and longer-term security posture improvements. The primary and most effective mitigation is the immediate application of Adobe's security patches and updates for all affected versions of Reader and Acrobat software. Organizations should implement strict update policies that ensure all systems running these applications receive security patches promptly. Network-based mitigations include implementing sandboxing techniques and application whitelisting to prevent execution of untrusted PDF files, though these approaches may impact user productivity and require careful configuration. The vulnerability's memory corruption nature makes it particularly susceptible to exploit prevention techniques such as address space layout randomization and data execution prevention mechanisms that are standard in modern operating systems. Security teams should consider implementing document inspection tools that can analyze PDF files for known malicious patterns before they are opened by Adobe applications. Regular vulnerability assessments and penetration testing should include verification that all affected Adobe products have been patched and that appropriate security controls are in place. The vulnerability's classification as a memory corruption issue also makes it susceptible to advanced exploit mitigation techniques including heap spraying and stack canaries that can prevent successful exploitation. Organizations should also consider deploying email filtering solutions that can identify and block malicious PDF attachments, as this vulnerability is frequently exploited through email-based attack vectors. The ATT&CK framework recommends implementing detection capabilities that monitor for suspicious process behavior and memory access patterns that might indicate exploitation attempts. Additionally, maintaining comprehensive backup and recovery procedures is essential, as exploitation of this vulnerability could lead to complete system compromise and data loss. Regular security awareness training for users can help reduce the risk of successful exploitation through social engineering attacks that rely on users opening malicious documents.