CVE-2017-2970 in Acrobat Reader
Summary
by MITRE
Adobe Acrobat Reader versions 15.020.20042 and earlier, 15.006.30244 and earlier, 11.0.18 and earlier have an exploitable heap overflow vulnerability in the XSLT engine related to template manipulation. Successful exploitation could lead to arbitrary code execution.
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Analysis
by VulDB Data Team • 05/14/2026
The vulnerability identified as CVE-2017-2970 represents a critical heap overflow condition within Adobe Acrobat Reader's XSLT engine implementation. This flaw exists in multiple version ranges including 15.020.20042 and earlier, 15.006.30244 and earlier, and 11.0.18 and earlier versions of the software. The vulnerability specifically manifests during template manipulation operations within the XSLT processing engine, which is responsible for transforming XML data into formatted output. When a maliciously crafted XSLT template is processed, the software fails to properly validate input boundaries, leading to memory corruption that can be exploited by attackers.
The technical exploitation of this vulnerability occurs through improper bounds checking within the XSLT engine's memory allocation routines. When processing malformed XSLT templates, the application allocates heap memory without adequate validation of template parameters, allowing attackers to overwrite adjacent memory locations. This heap overflow condition creates opportunities for arbitrary code execution, as attackers can manipulate memory layout to inject and execute malicious payloads. The vulnerability is particularly dangerous because it operates within the core document processing functionality of Acrobat Reader, making it accessible through routine PDF document viewing operations. The flaw can be triggered when users open maliciously crafted PDF files containing specially constructed XSLT templates that exploit the buffer overflow condition.
From an operational impact perspective, this vulnerability presents significant risk to organizations relying on Adobe Acrobat Reader for document processing. Attackers can leverage this vulnerability to execute arbitrary code on target systems with the privileges of the user running Acrobat Reader. The attack surface is broad since PDF documents are commonly shared via email, web downloads, and file transfers, making successful exploitation likely in targeted campaigns. The vulnerability's classification as a heap overflow aligns with CWE-121, which describes heap-based buffer overflow conditions, and represents a classic memory safety issue that enables privilege escalation and persistent system compromise. Security researchers have documented similar patterns in Adobe's XSLT processing implementations, highlighting the need for robust input validation in XML processing components.
Mitigation strategies for CVE-2017-2970 should prioritize immediate patch application from Adobe's security advisories, as the vendor released updates addressing the heap overflow condition in affected versions. Organizations should implement network-based protections such as PDF content filtering and sandboxing mechanisms to prevent exploitation of unpatched systems. Security teams should consider disabling XSLT processing functionality within Acrobat Reader where possible, particularly in environments where users encounter untrusted PDF documents. Additional protective measures include implementing email filtering rules to block suspicious PDF attachments and conducting user awareness training about avoiding potentially malicious document files. The vulnerability demonstrates the importance of maintaining current software versions and implementing layered security approaches, as outlined in the mitre ATT&CK framework's techniques for privilege escalation and execution through office applications. Regular vulnerability assessments and penetration testing should include evaluation of document processing components to identify similar memory corruption issues in other software applications.