CVE-2019-25362 in WMV to AVI MPEG DVD WMV Convertor
Summary
by MITRE • 02/19/2026
WMV to AVI MPEG DVD WMV Convertor 4.6.1217 contains a buffer overflow vulnerability that allows attackers to execute arbitrary code by overwriting the license name and license code fields. Attackers can craft a malicious payload of 6000 bytes to trigger a bind shell on port 4444 by exploiting a stack-based buffer overflow in the application's input handling.
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Analysis
by VulDB Data Team • 02/27/2026
The vulnerability identified as CVE-2019-25362 affects WMV to AVI MPEG DVD WMV Convertor version 4.6.1217, representing a critical stack-based buffer overflow flaw that fundamentally compromises the application's memory integrity. This vulnerability resides within the software's input validation mechanisms, specifically targeting the handling of license name and license code fields during the application's operation. The flaw manifests when the application processes malformed input data exceeding the allocated buffer space, creating an exploitable condition that can be leveraged by remote attackers to gain unauthorized system access. The vulnerability's severity is amplified by the fact that it allows for arbitrary code execution through a carefully crafted payload of exactly 6000 bytes, which when processed by the vulnerable application triggers a bind shell on port 4444, effectively providing attackers with persistent remote access to the compromised system.
The technical implementation of this buffer overflow vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions where insufficient bounds checking allows attackers to overwrite adjacent memory locations including return addresses and function parameters. The exploit chain begins with an attacker crafting a malicious input payload that exceeds the allocated buffer size for license fields, causing a stack corruption that ultimately results in code execution. This exploitation technique follows the ATT&CK framework's T1059.007 sub-technique for Command and Scripting Interpreter, specifically targeting Windows Command Prompt execution through the bind shell mechanism. The vulnerability's exploitation requires no special privileges beyond normal user access to the application, making it particularly dangerous as it can be triggered through legitimate user interaction with the software's interface.
The operational impact of this vulnerability extends beyond simple code execution to encompass full system compromise and potential lateral movement within network environments. Once exploited, the bind shell on port 4444 creates a persistent backdoor that allows attackers to maintain access even after system reboots, assuming the application continues to run with the vulnerable code path. The vulnerability affects any system running the specific version of the WMV to AVI MPEG DVD WMV Convertor software, making it particularly concerning for enterprise environments where multimedia conversion tools are commonly deployed. Organizations utilizing this software without proper patching or network segmentation face significant risk of unauthorized access, data exfiltration, and potential use as a pivot point for further attacks within their infrastructure. The vulnerability's detection is challenging as it requires monitoring for specific payload patterns and unusual network connections on port 4444, making it a stealthy threat that can remain undetected for extended periods.
Mitigation strategies for CVE-2019-25362 should prioritize immediate software updates from the vendor to address the buffer overflow condition, as this represents the most direct solution to the underlying flaw. Network administrators should implement firewall rules to block incoming connections on port 4444 and monitor for suspicious network activity that may indicate exploitation attempts. Application whitelisting policies can prevent execution of the vulnerable software unless explicitly authorized, while regular security assessments should include vulnerability scanning for similar buffer overflow conditions in multimedia and conversion software. System hardening measures including stack protection mechanisms and address space layout randomization should be enabled to make exploitation more difficult even if the primary vulnerability is not patched. Organizations should also establish incident response procedures specifically designed to handle bind shell exploitation scenarios, including network isolation protocols and forensic analysis capabilities to determine the extent of compromise following any successful attack.