CVE-2018-5009 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 Use-after-free vulnerability. Successful exploitation could lead to arbitrary code execution in the context of the current user.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
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 use-after-free vulnerability that represents a significant security risk for end users and organizations. This vulnerability falls under the CWE-416 category, which specifically addresses use-after-free conditions where memory is accessed after it has been freed, creating potential exploitation opportunities for malicious actors. The flaw exists within the processing of PDF documents and affects the application's memory management functions when handling certain malformed or crafted PDF files.
The technical implementation of this vulnerability occurs when the affected Adobe applications process PDF content that contains maliciously constructed objects or references. During the parsing and rendering of these documents, the application allocates memory for specific objects but fails to properly manage the lifecycle of that memory allocation. When the application attempts to free the memory associated with these objects and subsequently accesses them again, an attacker can manipulate the memory state to execute arbitrary code with the privileges of the current user. This type of vulnerability is particularly dangerous because it allows for privilege escalation without requiring elevated system access.
The operational impact of CVE-2018-5009 extends beyond simple code execution, as it represents a complete compromise of the user's system. Attackers can leverage this vulnerability to install malware, steal sensitive data, or establish persistent backdoors within the victim's environment. The vulnerability is particularly concerning because it affects widely deployed software applications that are commonly used for document viewing, making it an attractive target for phishing campaigns and targeted attacks. Organizations using these vulnerable versions face significant risk of data breaches, as the exploitation can occur simply through opening a malicious PDF document, often without user interaction beyond the initial document opening.
Mitigation strategies for this vulnerability should include immediate patching of all affected Adobe Acrobat and Reader installations to the latest available versions. Security administrators should implement comprehensive software update management policies to ensure all systems remain current with security patches. Additionally, organizations should deploy network-based intrusion detection systems that can identify attempts to deliver malicious PDF files and consider implementing application whitelisting policies that restrict execution of unauthorized software. The vulnerability aligns with several tactics described in the MITRE ATT&CK framework, particularly those related to initial access through malicious files and privilege escalation through code execution. Organizations should also consider implementing sandboxing solutions for PDF processing and establishing robust endpoint protection measures to detect and prevent exploitation attempts.