CVE-2018-5028 in Acrobat Reader
Summary
by MITRE
Adobe Acrobat and Reader 2018.011.20040 and earlier, 2017.011.30080 and earlier, and 2015.006.30418 and earlier versions have a Heap Overflow vulnerability. Successful exploitation could lead to arbitrary code execution in the context of the current user.
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Analysis
by VulDB Data Team • 04/06/2023
Adobe Acrobat and Reader versions prior to 2018.011.20040, 2017.011.30080, and 2015.006.30418 contain a critical heap overflow vulnerability that represents a significant security risk for end users and organizations. This vulnerability falls under the Common Weakness Enumeration category CWE-121, which describes heap-based buffer overflow conditions where insufficient boundary checking allows attackers to overwrite adjacent memory locations. The flaw occurs during the processing of maliciously crafted PDF files, specifically when handling certain data structures within the application's memory management routines. The heap overflow vulnerability manifests when the application fails to properly validate input data lengths before copying them into fixed-size heap buffers, creating opportunities for attackers to manipulate memory contents.
The exploitation of this vulnerability enables remote code execution with the privileges of the current user, making it particularly dangerous in enterprise environments where users may open untrusted PDF documents. Attackers can craft malicious PDF files that trigger the heap overflow when opened or even when simply viewed in the application's preview mode. The memory corruption resulting from this overflow can be leveraged to overwrite critical function pointers, return addresses, or other program control structures, allowing malicious code execution. This vulnerability aligns with the MITRE ATT&CK framework's technique T1203, which describes exploitation of software vulnerabilities to gain code execution, and T1059, which covers command and scripting interpreter usage for execution. The attack surface extends beyond simple document viewing to include automated processing of PDF content, making it particularly challenging to defend against.
The operational impact of CVE-2018-5028 extends beyond individual user compromise to affect entire organizations that rely on Adobe Acrobat and Reader for document processing and sharing. Organizations face potential data breaches, system compromise, and lateral movement opportunities for attackers who successfully exploit this vulnerability. The widespread adoption of Adobe Reader across enterprise environments amplifies the risk, as a single compromised user can potentially provide attackers with access to sensitive organizational documents and systems. The vulnerability demonstrates the critical importance of maintaining current software versions and implementing robust patch management processes. Security teams must prioritize immediate remediation of affected systems, as the exploitability of heap overflow vulnerabilities often increases over time as more sophisticated attack techniques are developed and documented. Organizations should also implement network segmentation and access controls to limit the potential impact of successful exploitation attempts.
Mitigation strategies for this vulnerability should include immediate patch deployment for all affected Adobe Acrobat and Reader installations, along with enhanced security measures such as PDF sandboxing, restricted file opening permissions, and network-based filtering of potentially malicious PDF content. System administrators should consider implementing application whitelisting policies that restrict execution of untrusted PDF files and monitor for unusual file access patterns that may indicate exploitation attempts. Additionally, organizations should conduct regular vulnerability assessments and penetration testing to identify potential attack vectors and ensure comprehensive protection against similar heap-based buffer overflow vulnerabilities. The remediation process should include thorough testing of patches in controlled environments before widespread deployment to prevent potential compatibility issues with existing workflows and document processing systems.