CVE-2016-4088 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-2016-1063, 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-2016-4089, 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 • 10/22/2024
Adobe Reader and Acrobat products have long been prime targets for cyber adversaries due to their widespread use and the complex nature of PDF processing. This vulnerability affects multiple versions of Adobe's flagship software across different platforms, creating a substantial attack surface that spans both legacy and modern iterations. The flaw manifests as a memory corruption issue that can be exploited to achieve arbitrary code execution or cause denial of service conditions, making it particularly dangerous for enterprise environments where these applications are commonly deployed. The vulnerability's classification as a memory corruption issue aligns with common exploit patterns that leverage buffer overflows, use-after-free conditions, or other memory management flaws that have been documented in security literature for decades. According to the CWE database, this vulnerability likely falls under categories related to memory safety issues, specifically those involving improper handling of memory resources during PDF parsing operations.
The technical exploitation of this vulnerability demonstrates the inherent risks associated with parsing complex document formats like PDFs, which contain numerous embedded objects and structures that must be carefully validated. Attackers can craft malicious PDF files that trigger the memory corruption when the vulnerable application attempts to process them, potentially leading to complete system compromise. The fact that this vulnerability is distinct from several other CVEs from the same timeframe indicates that it represents a unique code path or implementation flaw within Adobe's PDF processing libraries. This particular weakness likely stems from insufficient input validation or improper memory management during the parsing of specific PDF elements, such as embedded JavaScript, images, or other complex objects. The vulnerability's presence in both classic and continuous deployment models of Acrobat DC suggests that the underlying issue affects core processing components that have remained unchanged across different delivery mechanisms.
Organizations running affected versions of Adobe Reader and Acrobat face significant operational risks from this vulnerability, as it can be exploited through social engineering campaigns targeting end users or automated scanning of web applications that serve PDF content. The potential for remote code execution means that attackers can gain full control over affected systems, potentially leading to data breaches, lateral movement within networks, or establishment of persistent backdoors. The memory corruption aspect also presents a risk of denial of service attacks that can disrupt business operations by making critical applications unavailable to legitimate users. Security teams must consider the broader implications of this vulnerability within their attack surface, as the exploitation methods often align with techniques described in the MITRE ATT&CK framework under initial access and execution tactics. The vulnerability's impact extends beyond individual user systems to enterprise environments where PDF processing is integral to business operations, including document management systems, email servers, and web applications.
Mitigation strategies for this vulnerability should include immediate patching of all affected Adobe Reader and Acrobat installations, as well as implementation of network-based controls to block potentially malicious PDF content. Organizations should also consider deploying application whitelisting solutions that restrict execution of unauthorized PDF processing applications, while implementing robust email filtering and web proxy configurations to prevent users from accessing malicious PDF files. The vulnerability's nature suggests that regular security assessments of PDF handling capabilities within enterprise environments would be beneficial, particularly focusing on the validation of PDF content before processing. Security monitoring should include detection of suspicious PDF file characteristics and unusual application behavior patterns that might indicate exploitation attempts. Additionally, organizations should maintain updated threat intelligence feeds to identify new variants of attacks targeting this vulnerability, while ensuring that their incident response procedures include specific protocols for handling PDF-based security incidents. The remediation process should also involve comprehensive testing of patched applications to ensure that updates do not introduce compatibility issues with existing business processes or document workflows.