CVE-2016-4194 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-2016-4195, CVE-2016-4196, 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 attackers due to their widespread deployment and the complex nature of their codebases. The vulnerability identified as CVE-2016-4194 represents a critical memory corruption issue that affects multiple versions of Adobe's document processing software across both Windows and macOS operating systems. This vulnerability specifically impacts Adobe Reader versions before 11.0.17, as well as Acrobat and Acrobat Reader DC Classic before 15.006.30198 and Acrobat and Acrobat Reader DC Continuous before 15.017.20050. The flaw allows threat actors to potentially execute arbitrary code or induce denial of service conditions through unspecified attack vectors that differ from other contemporaneous vulnerabilities in the same advisory cycle.
The technical nature of this memory corruption vulnerability stems from improper handling of data structures within Adobe's PDF processing engine. When processing maliciously crafted PDF files, the software fails to properly validate memory operations, leading to potential buffer overflows, heap corruption, or other memory management errors. These issues typically arise when the application attempts to write data beyond allocated memory boundaries or access invalid memory locations. The unspecified vectors suggest that attackers could exploit this weakness through various methods including malformed PDF content, embedded objects, or specially crafted JavaScript within the document structure. Such vulnerabilities fall under CWE-125, which describes out-of-bounds read conditions, and CWE-787, which covers out-of-bounds write conditions, both of which are common in memory safety issues within complex software applications.
The operational impact of CVE-2016-4194 extends beyond simple denial of service scenarios to potentially enable full system compromise. Attackers who successfully exploit this vulnerability could gain arbitrary code execution privileges, allowing them to install malware, modify system files, or establish persistent backdoors. The memory corruption aspects of this flaw make it particularly dangerous because they can be leveraged for advanced persistent threat campaigns where attackers seek long-term access to compromised systems. Organizations using affected Adobe products face significant risk of data breaches, system infiltration, and potential lateral movement within their networks. The vulnerability's presence in both Reader and Acrobat applications means that it affects not only end-user systems but also enterprise document management systems where these applications are commonly deployed.
Organizations should implement immediate mitigation strategies to protect against exploitation of this vulnerability. The most effective approach involves deploying the security updates provided by Adobe, which include patches specifically designed to address the memory corruption issues in the affected versions. System administrators should prioritize patching across all affected platforms, particularly focusing on high-value targets such as servers running document processing applications and systems with elevated privileges. Network segmentation and application whitelisting can provide additional layers of defense by limiting the potential attack surface and preventing unauthorized execution of malicious code. Security monitoring should be enhanced to detect unusual memory access patterns or suspicious PDF processing activities that might indicate exploitation attempts. The vulnerability aligns with several ATT&CK tactics including execution through malicious document files and privilege escalation via memory corruption exploits, making comprehensive defensive measures essential for protecting enterprise environments against sophisticated adversaries who might leverage this weakness in targeted attacks.