CVE-2019-25559 in SpotPaltalk
Summary
by MITRE • 03/21/2026
SpotPaltalk 1.1.5 contains a denial of service vulnerability in the registration code input field that allows local attackers to crash the application by submitting an excessively long string. Attackers can paste a buffer of 1000 characters into the Name/Key field during registration to trigger a crash when the OK button is clicked.
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Analysis
by VulDB Data Team • 03/21/2026
The vulnerability identified as CVE-2019-25559 represents a classic buffer overflow condition within the SpotPaltalk 1.1.5 software application. This issue manifests specifically within the registration code input field, where the application fails to properly validate or sanitize user input before processing. The flaw exists at the input validation layer, where the software does not implement adequate bounds checking mechanisms to prevent excessive data from being processed. When an attacker submits a string containing 1000 characters into the Name/Key field during the registration process, the application's internal buffer handling mechanism becomes overwhelmed, leading to an abrupt termination of the application. This represents a fundamental failure in memory management and input validation practices that directly impacts the software's stability and availability.
The technical implementation of this vulnerability stems from improper buffer management within the application's registration module. The software appears to allocate a fixed-size buffer for storing registration information without implementing proper input length validation or dynamic memory allocation strategies. This vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions, and CWE-122, which covers heap-based buffer overflow scenarios. The attack vector specifically targets the user interface input handling mechanism, where the application processes user-submitted data without adequate sanitization. When the OK button is clicked, the application attempts to process the malformed input, causing memory corruption that results in a crash. This behavior demonstrates a clear violation of secure coding practices and represents a fundamental flaw in the software's defensive programming approach.
From an operational perspective, this denial of service vulnerability creates significant risks for both end users and system administrators. Local attackers can exploit this weakness to disrupt the normal operation of the SpotPaltalk application, potentially causing service interruption for legitimate users who require access to the software's registration functionality. The impact extends beyond simple application instability as it could be leveraged as part of broader attack campaigns where attackers seek to compromise system availability. The vulnerability's accessibility through simple clipboard operations makes it particularly concerning, as it requires minimal technical expertise to execute. This weakness creates opportunities for attackers to establish persistent access points or to disrupt service availability in environments where SpotPaltalk is deployed. The vulnerability also demonstrates poor defensive design principles that could indicate additional security weaknesses within the application's codebase.
Mitigation strategies for CVE-2019-25559 must address both immediate remediation and long-term architectural improvements. The primary solution involves implementing proper input validation and bounds checking mechanisms within the registration module, ensuring that all user inputs are validated against predetermined maximum length limits before processing. This approach aligns with ATT&CK technique T1499.004, which covers network denial of service attacks, and represents a fundamental defensive measure against buffer overflow exploitation. System administrators should also implement input sanitization measures and consider deploying application-level firewalls or intrusion detection systems to monitor for suspicious input patterns. Additionally, the software should be updated to include proper error handling mechanisms that prevent crashes from occurring when malformed input is detected. Organizations should also conduct thorough code reviews to identify similar buffer management issues throughout the application's codebase, as this vulnerability likely indicates broader architectural weaknesses that could be exploited in other components of the software.