CVE-2019-25644 in Video Convert
Summary
by MITRE • 03/24/2026
WinMPG Video Convert 9.3.5 and older versions contain a buffer overflow vulnerability in the registration dialog that allows local attackers to crash the application by supplying oversized input. Attackers can paste a large payload of 6000 bytes into the Name and Registration Code field to trigger a denial of service condition.
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Analysis
by VulDB Data Team • 03/29/2026
This vulnerability exists within WinMPG Video Convert version 9.3.5 and earlier releases, representing a classic buffer overflow flaw in the application's registration dialog component. The issue manifests when users attempt to register the software by entering data into the Name and Registration Code fields. The vulnerability stems from inadequate input validation and bounds checking within the registration processing code, where the application fails to properly sanitize user-supplied data before storing it in fixed-size memory buffers. When attackers supply oversized input exceeding the allocated buffer space, typically 6000 bytes in each field, the excessive data overflows into adjacent memory regions, causing the application to terminate abruptly and resulting in a denial of service condition.
The technical exploitation of this vulnerability aligns with common software security weaknesses categorized under CWE-121, which addresses stack-based buffer overflow conditions, and CWE-787, which covers out-of-bounds write vulnerabilities. The attack vector is particularly concerning as it requires no special privileges beyond normal user access, making it a local privilege escalation vulnerability that can be exploited by any user with access to the vulnerable application. The specific nature of the flaw allows for predictable crash conditions that can be reliably reproduced through controlled input manipulation, making this vulnerability suitable for exploitation in automated attack scenarios.
From an operational impact perspective, this vulnerability significantly undermines the availability and reliability of the WinMPG Video Convert application, potentially disrupting legitimate user workflows and creating opportunities for more sophisticated attacks. The denial of service condition affects the application's core functionality, preventing users from completing the registration process and potentially rendering the software unusable until the application is restarted or the vulnerable component is patched. The vulnerability's impact extends beyond simple service disruption as it could serve as a stepping stone for more advanced attacks, particularly if the application executes with elevated privileges or if the buffer overflow can be chained with other vulnerabilities.
The mitigation strategies for this vulnerability should focus on immediate patching of the affected software versions, which would involve implementing proper input validation and bounds checking mechanisms within the registration dialog. Security practitioners should also consider implementing application whitelisting policies to prevent execution of vulnerable software versions and deploy intrusion detection systems to monitor for exploitation attempts. Additionally, users should be educated about the risks of installing untrusted software versions and the importance of maintaining current software updates. The vulnerability demonstrates the critical importance of input validation in preventing buffer overflow exploits and aligns with ATT&CK technique T1203, which covers legitimate user privileges to gain access to vulnerable applications, making it particularly relevant for enterprise security configurations and incident response procedures.