CVE-2018-16036 in Acrobat Reader
Summary
by MITRE
Adobe Acrobat and Reader versions 2019.008.20081 and earlier, 2019.008.20080 and earlier, 2019.008.20081 and earlier, 2017.011.30106 and earlier version, 2017.011.30105 and earlier version, 2015.006.30457 and earlier, and 2015.006.30456 and earlier have a use after free vulnerability. Successful exploitation could lead to arbitrary code execution.
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Analysis
by VulDB Data Team • 08/02/2024
The vulnerability identified as CVE-2018-16036 represents a critical use after free flaw affecting multiple versions of Adobe Acrobat and Reader software. This issue manifests in the handling of memory management within the application's processing pipeline, specifically when dealing with objects that are freed from memory but subsequently referenced. The vulnerability affects various product versions including 2019.008.20081 and earlier, 2017.011.30106 and earlier, 2015.006.30457 and earlier, and their corresponding predecessors. The use after free condition occurs when the application attempts to access memory that has already been deallocated, creating a potential exploitation vector for malicious actors. This particular vulnerability falls under the CWE-416 category, which specifically addresses the use of freed memory conditions in software development. The flaw resides in the application's memory management routines where proper validation of object references is not adequately enforced after memory deallocation occurs.
The operational impact of this vulnerability extends significantly beyond simple memory corruption, as successful exploitation can result in arbitrary code execution within the context of the vulnerable application. Attackers who successfully exploit this use after free vulnerability can potentially gain complete control over the affected system, as the memory corruption allows for code injection and execution in the target environment. This type of vulnerability typically requires a crafted malicious document to trigger the vulnerable code path, making it particularly dangerous in targeted attack scenarios. The exploitation process leverages the freed memory object to overwrite critical program data or function pointers, ultimately allowing attackers to redirect program execution flow. Such vulnerabilities are particularly concerning in enterprise environments where Adobe Reader is commonly used for document processing, as they can serve as initial access vectors for broader network infiltration. The ATT&CK framework categorizes this vulnerability under the T1059 technique, which involves executing commands through legitimate system tools, as the exploited memory corruption can be used to execute malicious payloads.
The remediation strategy for CVE-2018-16036 requires immediate patching of affected Adobe Acrobat and Reader installations across all supported versions. Adobe released security updates addressing this vulnerability, and organizations should prioritize deployment of these patches to mitigate the risk of exploitation. Additionally, implementing application whitelisting controls can provide an additional layer of protection by restricting execution of unauthorized code. Network segmentation and privilege separation should be enforced to limit the potential impact if exploitation occurs. Security monitoring should include detection of suspicious document processing activities and unusual memory access patterns that may indicate exploitation attempts. Regular vulnerability assessments and penetration testing should be conducted to identify similar memory management issues in other software components. Organizations should also consider implementing sandboxing techniques for document processing to isolate potentially malicious content from the primary operating environment. The vulnerability demonstrates the critical importance of proper memory management practices in software development and the necessity of comprehensive security testing throughout the software development lifecycle to prevent such use after free conditions from persisting in production environments.