CVE-2019-25474 in Easy MP3 Downloader Denial of Service
Summary
by MITRE • 03/11/2026
Easy MP3 Downloader 4.7.8.8 contains a buffer overflow vulnerability that allows local attackers to crash the application by supplying an excessively long unlock code. Attackers can generate a file containing 6000 'A' characters and paste the contents into the Unlock Code field during application startup to trigger a denial of service condition.
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Analysis
by VulDB Data Team • 03/14/2026
The vulnerability identified as CVE-2019-25474 affects Easy MP3 Downloader version 4.7.8.8 and represents a classic buffer overflow condition that manifests during application startup when processing user input through the unlock code field. This type of vulnerability falls under the CWE-121 category of stack-based buffer overflow, where insufficient bounds checking allows an attacker to overwrite adjacent memory locations. The specific implementation flaw occurs when the application fails to validate the length of input provided in the unlock code field, creating an exploitable condition that can be triggered by malicious input sequences.
The technical exploitation of this vulnerability requires minimal effort from an attacker who can simply generate a text file containing 6000 consecutive 'A' characters and paste this content into the unlock code field during application initialization. This approach leverages the application's lack of input sanitization and length validation mechanisms, allowing the excessive input to overflow the allocated buffer space and subsequently corrupt the program's execution flow. The buffer overflow condition results in an application crash that manifests as a denial of service, effectively preventing legitimate users from accessing the software functionality. The vulnerability is particularly concerning because it occurs during the application startup phase, making it impossible for users to properly utilize the software until the application is restarted or the vulnerable component is removed.
From an operational perspective, this vulnerability presents a significant risk to system availability and user productivity within environments where Easy MP3 Downloader is deployed. The local nature of the attack means that exploitation requires physical access to the target system or the ability to execute code locally, but the impact remains substantial as it completely disrupts application functionality. The vulnerability's trigger mechanism is straightforward and does not require sophisticated attack vectors, making it accessible to a wide range of threat actors. This type of denial of service condition can be particularly problematic in enterprise environments where multiple users rely on the same software applications, potentially causing cascading effects on productivity and system availability. The vulnerability also demonstrates poor input validation practices that are commonly addressed through secure coding guidelines and defensive programming techniques.
The recommended mitigations for this vulnerability include immediate application updates from the vendor to address the buffer overflow condition through proper input validation and bounds checking implementations. System administrators should implement application whitelisting policies to restrict execution of untrusted software and ensure that vulnerable versions are not deployed in production environments. Additionally, implementing input length restrictions and sanitization mechanisms within the application code can prevent similar vulnerabilities from occurring in the future. The vulnerability aligns with ATT&CK technique T1499.004 for network denial of service and represents a common weakness in software development practices that can be addressed through comprehensive secure coding training and code review processes. Organizations should also consider deploying intrusion detection systems that can monitor for suspicious input patterns that may indicate attempted exploitation of similar buffer overflow vulnerabilities.