CVE-2018-12868 in Acrobat Reader
Summary
by MITRE
Adobe Acrobat and Reader versions 2018.011.20063 and earlier, 2017.011.30102 and earlier, and 2015.006.30452 and earlier have an out-of-bounds write vulnerability. Successful exploitation could lead to arbitrary code execution.
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Analysis
by VulDB Data Team • 05/25/2023
Adobe Acrobat and Reader applications contain a critical out-of-bounds write vulnerability that affects multiple versions across different release cycles. This vulnerability resides in the handling of malformed PDF files and represents a classic buffer overflow condition that can be exploited by attackers to execute arbitrary code on affected systems. The flaw manifests when the software processes certain elements within PDF documents without proper bounds checking, allowing an attacker to write data beyond the allocated memory buffer. This particular vulnerability has been classified under CWE-787, which specifically addresses out-of-bounds write conditions in software applications. The issue affects Adobe Acrobat DC versions 2018.011.20063 and earlier, Adobe Acrobat DC 2017 versions 2017.011.30102 and earlier, and Adobe Acrobat DC 2015 versions 2015.006.30452 and earlier, representing a broad attack surface across multiple product generations.
The technical exploitation of this vulnerability follows a well-established pattern that aligns with ATT&CK technique T1203, where adversaries leverage application flaws to achieve code execution. When a malicious PDF file is opened, the vulnerable parsing logic attempts to write data to memory locations beyond the intended buffer boundaries, potentially overwriting critical program structures or executable code. Attackers can craft specially designed PDF documents that trigger this condition during normal document rendering operations, effectively allowing them to inject and execute malicious code with the privileges of the victim user. The vulnerability's impact extends beyond simple code execution as it can be leveraged in combination with other techniques to establish persistent access or escalate privileges within the compromised system.
The operational impact of CVE-2018-12868 represents a significant risk to organizations that rely heavily on Adobe Acrobat and Reader for document processing and sharing. Given the widespread deployment of these applications across enterprise environments, the vulnerability could enable attackers to gain unauthorized access to sensitive documents and potentially compromise entire networks. The attack surface is particularly concerning because PDF files are commonly shared through email attachments, document repositories, and web downloads, making this vulnerability highly accessible to threat actors. Organizations utilizing these applications for business-critical operations face substantial risk of data breaches, intellectual property theft, or system compromise if proper mitigations are not implemented. The vulnerability's potential for remote code execution without user interaction makes it particularly dangerous in targeted attack scenarios where attackers seek to establish persistent access to network infrastructure.
Mitigation strategies for this vulnerability should prioritize immediate patching of all affected Adobe Acrobat and Reader installations across the enterprise environment. Organizations should implement a comprehensive vulnerability management program that includes regular security updates and system monitoring to detect potential exploitation attempts. Additional defensive measures include deploying email filtering solutions that can identify and block suspicious PDF attachments, implementing application whitelisting policies to restrict PDF processing to trusted applications, and conducting regular security assessments to identify systems that may have been compromised. Network segmentation and endpoint protection solutions should also be configured to monitor for unusual PDF processing activities that could indicate exploitation attempts. The remediation process should follow established security protocols including testing patches in controlled environments before widespread deployment, ensuring that critical systems are prioritized for immediate update, and maintaining detailed logs of all vulnerability remediation activities for audit and compliance purposes.