CVE-2019-25467 in docPrint Pro
Summary
by MITRE • 03/11/2026
Verypdf docPrint Pro 8.0 contains a structured exception handling buffer overflow vulnerability that allows local attackers to execute arbitrary code by supplying an oversized alphanumeric encoded payload in the User Password or Master Password fields. Attackers can craft a malicious payload with encoded shellcode and SEH chain manipulation to bypass protections and execute a MessageBox proof-of-concept when the password fields are processed during PDF encryption.
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Analysis
by VulDB Data Team • 03/14/2026
The vulnerability CVE-2019-25467 represents a critical buffer overflow flaw in VeryPDF DocPrint Pro version 8.0 that falls under the category of structured exception handling exploitation. This vulnerability exists within the password processing functionality of the PDF printing software, specifically when handling User Password or Master Password fields during PDF encryption operations. The flaw stems from inadequate input validation and memory management practices that fail to properly bounds-check user-supplied data before processing it within the structured exception handling framework.
The technical implementation of this vulnerability involves a classic stack-based buffer overflow scenario where attackers can manipulate the exception handling mechanism through structured exception handling chain manipulation. When the software processes oversized alphanumeric encoded payloads in password fields, the insufficient buffer size validation allows attackers to overwrite adjacent memory locations including the structured exception handler records. This manipulation enables the attacker to redirect execution flow and inject malicious shellcode that executes with the privileges of the affected application process. The vulnerability specifically targets the exception handling mechanism rather than direct memory corruption, making it particularly challenging to detect and mitigate through traditional buffer overflow defenses.
From an operational impact perspective, this vulnerability presents a significant risk to local attackers who can leverage it to execute arbitrary code on systems running the affected software. The exploitability is enhanced by the fact that the vulnerability can be triggered through legitimate password input fields, making it difficult to distinguish between malicious and legitimate usage patterns. The attack requires no network connectivity and can be executed locally, making it particularly dangerous in environments where users have access to the vulnerable application. The proof-of-concept demonstration using MessageBox functionality indicates that the vulnerability can be reliably exploited to achieve code execution, potentially allowing attackers to escalate privileges or establish persistent access to affected systems.
The exploitation technique leverages SEH (Structured Exception Handling) chain manipulation to bypass modern exploit mitigation techniques including stack canaries and address space layout randomization. This approach aligns with the ATT&CK framework's technique T1059.007 for command and script interpreter execution, as the malicious payload ultimately results in arbitrary code execution. The vulnerability also relates to CWE-121, which describes stack-based buffer overflow conditions, and CWE-122, which covers heap-based buffer overflow scenarios. Security professionals should note that this vulnerability demonstrates how legacy applications may contain outdated exception handling mechanisms that fail to properly validate input lengths, creating exploitable conditions that persist across multiple software versions.
Mitigation strategies should focus on immediate software updates from the vendor to address the buffer overflow conditions in the structured exception handling implementation. Organizations should implement application whitelisting policies to restrict execution of the vulnerable software unless absolutely necessary, and consider deploying exploit prevention mechanisms such as DEP (Data Execution Prevention) and ASLR (Address Space Layout Randomization) to complicate exploitation attempts. Network segmentation and privilege separation can help limit the potential impact if exploitation occurs, while regular security assessments should verify that similar vulnerabilities do not exist in other components of the document processing pipeline. The vulnerability highlights the importance of maintaining up-to-date security patches for third-party applications and implementing comprehensive input validation controls to prevent similar issues in custom software implementations.