CVE-2018-25297: Wansview Buffer Overflow Vulnerability

CVE-2018-25297 Overview

CVE-2018-25297 is a buffer overflow vulnerability affecting Wansview version 1.0.2. This vulnerability allows local attackers to crash the application by supplying oversized input strings. Attackers can inject 2000-byte payloads into the Camera name and DID number fields during camera addition to trigger application crashes, resulting in a denial of service condition.

Critical Impact

Local attackers can cause application crashes and denial of service by exploiting improper input validation in the camera configuration fields.

Affected Products

• Wansview 1.0.2

Discovery Timeline

• 2026-04-26 - CVE CVE-2018-25297 published to NVD
• 2026-04-27 - Last updated in NVD database

Technical Details for CVE-2018-25297

Vulnerability Analysis

This vulnerability is classified as CWE-120 (Buffer Copy without Checking Size of Input), commonly known as a classic buffer overflow. The Wansview application fails to properly validate the length of user-supplied input when adding camera configurations. When users enter data into the Camera name or DID number fields, the application copies this input to a fixed-size buffer without first checking whether the input exceeds the buffer's capacity.

The local attack vector requires an attacker to have access to the system where the Wansview application is running. No authentication is required to trigger the vulnerability, and no user interaction beyond normal application usage is necessary. The primary impact is on system availability, as successful exploitation results in application crashes.

Root Cause

The root cause of this vulnerability lies in improper input validation and unsafe memory handling practices. The application uses buffer copy operations that do not verify the size of incoming data against the destination buffer's capacity. When 2000-byte payloads are injected into the Camera name or DID number input fields, the application attempts to write beyond the allocated buffer boundaries, causing memory corruption and ultimately an application crash.

Attack Vector

The attack requires local access to the system running the Wansview application. An attacker can exploit this vulnerability by navigating to the camera addition functionality and entering an oversized string (approximately 2000 bytes) into either the Camera name field or the DID number field. Upon submission or processing of this input, the buffer overflow is triggered, causing the application to crash.

The vulnerability mechanism involves the following sequence: when the user submits camera configuration data, the application allocates a fixed-size buffer to store field values. The input handling routine copies user-supplied data directly into this buffer without bounds checking. When the input exceeds the buffer size, memory adjacent to the buffer is overwritten, corrupting the application's memory state and leading to a crash. For technical implementation details, refer to the Exploit-DB #45194 entry.

Detection Methods for CVE-2018-25297

Indicators of Compromise

• Unexpected application crashes during camera configuration or addition operations
• System logs showing application termination with memory access violation errors
• Repeated crashes when specific camera names or DID numbers are entered
• Evidence of unusually long input strings in application configuration files

Detection Strategies

• Monitor application crash logs for signs of buffer overflow conditions in the Wansview application
• Implement application-level monitoring to detect abnormally long input strings being submitted to configuration fields
• Use endpoint detection solutions to identify process crashes that match buffer overflow patterns
• Review system event logs for memory access violations associated with the Wansview process

Monitoring Recommendations

• Enable crash dump collection for the Wansview application to analyze exploitation attempts
• Configure endpoint protection to alert on repeated application crashes
• Implement logging for all camera configuration changes to track potential exploitation
• Monitor for unusual user activity patterns around camera management functions

How to Mitigate CVE-2018-25297

Immediate Actions Required

• Restrict local access to systems running the vulnerable Wansview 1.0.2 application to trusted users only
• Consider removing or disabling the Wansview application until a patched version is available
• Implement application whitelisting to prevent unauthorized modifications to the Wansview installation
• Deploy endpoint protection solutions capable of detecting buffer overflow exploitation attempts

Patch Information

No vendor patch information is currently available in the CVE data. Organizations should monitor the vendor's official channels for security updates. Additional technical details can be found in the VulnCheck Advisory: Wansview DoS and Exploit-DB #45194.

Workarounds

• Limit physical and local access to systems running the Wansview application
• Implement strict user access controls to prevent untrusted users from accessing the application
• Consider deploying the application in an isolated environment to minimize impact of potential crashes
• Use application sandboxing technologies to contain the impact of buffer overflow exploitation