CVE-2019-25349: ScadaApp for iOS DoS Vulnerability

CVE-2019-25349 Overview

CVE-2019-25349 is a denial of service vulnerability affecting ScadaApp for iOS version 1.1.4.0. The vulnerability exists due to a classic buffer overflow condition (CWE-120) in the Servername field input handling. Attackers can exploit this flaw by inputting an oversized buffer of 257 characters or more during the login process, causing the application to crash on iOS devices.

Critical Impact

This vulnerability enables attackers to crash the ScadaApp application through local interaction, potentially disrupting SCADA monitoring and control operations on affected iOS devices.

Affected Products

• ScadaApp for iOS version 1.1.4.0

Discovery Timeline

• 2026-02-18 - CVE CVE-2019-25349 published to NVD
• 2026-02-19 - Last updated in NVD database

Technical Details for CVE-2019-25349

Vulnerability Analysis

This vulnerability stems from improper bounds checking in the Servername input field within ScadaApp for iOS. The application fails to validate the length of user-supplied input before copying it into a fixed-size memory buffer. When a user enters more than 256 characters into the Servername field during the login process, the application attempts to store this data in an insufficiently sized buffer, resulting in a buffer overflow condition that crashes the application.

The local attack vector means an attacker requires direct access to the iOS device or must trick a user into entering the malicious input. While this limits remote exploitation scenarios, in industrial control system (ICS) and SCADA environments, even local denial of service vulnerabilities can have significant operational impacts by disrupting monitoring capabilities.

Root Cause

The root cause is a buffer overflow vulnerability (CWE-120: Buffer Copy without Checking Size of Input). The application allocates a fixed-size buffer for the Servername field but does not enforce input length restrictions before copying user data. This classic input validation failure allows oversized data to overflow the allocated memory region, corrupting adjacent memory and triggering an application crash.

Attack Vector

The attack requires local access to the iOS device running ScadaApp. An attacker can exploit this vulnerability by:

1. Launching ScadaApp on an iOS device
2. Navigating to the login screen where the Servername field is present
3. Pasting or entering a string of 257 or more characters into the Servername field
4. Submitting the login form, which triggers the buffer overflow and crashes the application

The vulnerability requires user interaction to navigate to the vulnerable input field. A public exploit demonstrating this attack is documented in Exploit-DB #47678.

Detection Methods for CVE-2019-25349

Indicators of Compromise

• Application crash logs on iOS devices showing ScadaApp terminated unexpectedly
• Crash reports indicating memory corruption or buffer overflow exceptions in ScadaApp
• Unusual or repeated application restarts in SCADA monitoring environments

Detection Strategies

• Monitor iOS device crash logs for ScadaApp abnormal terminations
• Implement endpoint detection solutions that can identify application crash patterns
• Review mobile device management (MDM) logs for repeated ScadaApp failures
• Deploy application monitoring to detect unusual restart patterns

Monitoring Recommendations

• Enable crash reporting and logging for mobile SCADA applications
• Configure alerting for repeated application failures in operational technology environments
• Monitor MDM platforms for anomalous application behavior across managed iOS devices

How to Mitigate CVE-2019-25349

Immediate Actions Required

• Identify all iOS devices running ScadaApp version 1.1.4.0 within your environment
• Restrict physical access to devices running vulnerable ScadaApp installations
• Implement MDM policies to control application deployment and updates
• Consider removing or replacing the vulnerable application if no patch is available

Patch Information

Users should check the Apple App Store for updated versions of ScadaApp that address this vulnerability. Consult the VulnCheck advisory for additional vendor guidance and remediation information.

Workarounds

• Implement device-level access controls to prevent unauthorized users from interacting with ScadaApp
• Use MDM solutions to restrict clipboard functionality on devices running vulnerable applications
• Consider network segmentation to isolate devices running SCADA monitoring applications
• Train users to avoid entering untrusted or excessively long input into application fields