CVE-2019-25349 in scadaApp
Summary
by MITRE • 02/19/2026
ScadaApp for iOS 1.1.4.0 contains a denial of service vulnerability that allows attackers to crash the application by inputting an oversized buffer in the Servername field. Attackers can paste a 257-character buffer during login to trigger an application crash on iOS devices.
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Analysis
by VulDB Data Team • 02/19/2026
The vulnerability identified as CVE-2019-25349 affects ScadaApp for iOS version 1.1.4.0 and represents a classic buffer overflow condition that manifests as a denial of service attack. This issue resides within the application's input validation mechanisms, specifically targeting the Servername field during the authentication process. The flaw demonstrates characteristics consistent with CWE-121, which describes stack-based buffer overflow conditions where insufficient bounds checking allows attackers to write beyond allocated memory boundaries. The vulnerability exploits a fundamental weakness in the application's memory management practices, where the developers failed to implement proper input length validation for user-supplied data.
The technical execution of this vulnerability requires minimal sophistication from an attacker perspective, as it involves simply pasting a 257-character string into the Servername field during login operations. This specific character count suggests the application allocates a buffer of 256 characters or fewer for server name handling, creating a one-byte overflow condition that can corrupt adjacent memory structures. The crash occurs during the application's normal processing flow when it attempts to handle the oversized input without proper bounds checking. This behavior aligns with ATT&CK technique T1499.004, which covers network denial of service attacks through malformed input handling.
The operational impact of this vulnerability extends beyond simple application instability, as it can be leveraged to disrupt critical industrial control system operations where ScadaApp serves as a communication interface. In industrial environments where continuous operation is paramount, such a denial of service condition can lead to significant operational disruptions, potentially affecting production processes or monitoring capabilities. The vulnerability affects iOS devices specifically, indicating that the issue stems from platform-specific memory management behaviors or iOS application framework limitations. The exploitability factor is relatively high given that attackers need only paste a specific character length string to trigger the crash, making it an attractive target for adversaries seeking to disrupt operations without requiring advanced technical skills.
Mitigation strategies for this vulnerability should focus on implementing proper input validation and bounds checking mechanisms within the application's authentication flow. Developers should enforce strict length limitations on all user inputs, particularly those used in critical system operations such as login processes. The recommended approach involves implementing defensive programming practices that include buffer size validation, proper memory allocation techniques, and input sanitization routines. Additionally, implementing robust error handling and graceful degradation mechanisms can help prevent complete application crashes while maintaining system availability. Security patches should address the root cause by ensuring that the Servername field accepts only valid character lengths and implements appropriate memory management practices. Organizations should also consider network-level monitoring to detect potential exploitation attempts and maintain regular application updates to address similar vulnerabilities in related software components. The fix should align with secure coding guidelines that prevent buffer overflow conditions while maintaining application functionality and user experience standards.