CVE-2019-25564 in PCHelpWareV2
Summary
by MITRE • 03/21/2026
PCHelpWareV2 1.0.0.5 contains a denial of service vulnerability that allows local attackers to crash the application by supplying an excessively long string in the Group field. Attackers can paste a buffer overflow payload into the Group property field and click Ok to trigger an application crash.
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Analysis
by VulDB Data Team • 03/27/2026
The vulnerability identified as CVE-2019-25564 affects PCHelpWareV2 version 1.0.0.5, a remote desktop and system management tool that exposes critical security flaws through improper input validation mechanisms. This denial of service vulnerability represents a significant weakness in the application's defensive architecture, specifically targeting the Group field property within the user interface. The flaw manifests when local attackers exploit the absence of proper string length validation, allowing them to craft malicious payloads that exceed the application's buffer capacity. The vulnerability falls under the category of buffer overflow conditions, which are classified as CWE-121 in the Common Weakness Enumeration framework, representing stack-based buffer overflow scenarios where insufficient bounds checking permits memory corruption. The attack vector requires local system access and leverages the application's failure to implement input sanitization, making it particularly concerning for environments where privileged access might be compromised. When a malicious user supplies an excessively long string to the Group field and confirms the action through the Ok button, the application's memory management fails catastrophically, resulting in an immediate application crash that disrupts normal system operations.
The technical implementation of this vulnerability demonstrates a classic buffer overrun scenario where the application allocates a fixed-size buffer for the Group field without validating the input length against predefined limits. This design flaw creates an exploitable condition where the attacker can exceed the allocated memory space, causing unpredictable behavior including stack corruption, memory overwrite, or complete application termination. The vulnerability's exploitation requires minimal technical expertise since it only necessitates pasting a crafted payload and clicking a confirmation button, making it particularly dangerous in environments where unauthorized local access is possible. From an operational perspective, this vulnerability directly impacts system availability and can be classified under the ATT&CK technique T1499.004 for Network Denial of Service, as it effectively renders the application unusable through controlled input manipulation. The attack's simplicity and the fact that it requires no specialized tools or network access make it a preferred method for adversaries seeking to disrupt system services or create distractions during broader attack campaigns.
The operational impact of CVE-2019-25564 extends beyond simple application disruption, as it can serve as a foothold for more sophisticated attacks or as a method to obscure other malicious activities. System administrators and security personnel may find their monitoring tools overwhelmed by repeated crashes, potentially masking more serious security incidents. The vulnerability's presence in a remote management tool creates additional risk since such applications often run with elevated privileges, potentially allowing attackers to escalate their compromise beyond simple denial of service. Organizations utilizing PCHelpWareV2 should consider this vulnerability as part of a broader security assessment, particularly in environments where the tool is used for critical system maintenance or remote support operations. The flaw's classification as a local privilege escalation vector through denial of service means that attackers with basic system access can cause significant operational disruption, potentially affecting business continuity and system availability. Mitigation strategies should include immediate software updates from the vendor, implementation of input validation controls, and network segmentation to limit local access to systems running the vulnerable application. Security teams must also monitor for exploitation attempts and consider this vulnerability as part of their incident response planning, given its potential to be used as a reconnaissance tool or as part of a multi-stage attack approach. The vulnerability highlights the critical importance of input validation and memory safety practices in software development, particularly for applications that handle user-provided data in critical system functions.