CVE-2018-25245: 7 Tik 1.0.1.0 DOS Vulnerability

CVE-2018-25245 Overview

CVE-2018-25245 is a Denial of Service (DoS) vulnerability affecting 7 Tik version 1.0.1.0. The vulnerability allows attackers to crash the application by submitting excessively long input strings to the search functionality. By pasting a buffer of approximately 7700 characters into the search bar, an attacker can trigger an application crash, rendering the software unusable.

Critical Impact

Attackers can remotely crash 7 Tik applications without authentication by exploiting improper input validation in the search functionality, causing complete denial of service.

Affected Products

• 7 Tik version 1.0.1.0

Discovery Timeline

• 2026-04-04 - CVE-2018-25245 published to NVD
• 2026-04-07 - Last updated in NVD database

Technical Details for CVE-2018-25245

Vulnerability Analysis

This vulnerability is classified as a Denial of Service condition stemming from improper input validation in the application's search functionality. The 7 Tik application fails to properly validate and limit the length of user-supplied input in the search bar, allowing attackers to submit maliciously crafted input strings that exceed expected buffer boundaries.

When a user pastes approximately 7700 characters into the search field, the application is unable to handle the excessive input, resulting in an uncontrolled resource consumption scenario that crashes the application. This vulnerability can be exploited remotely over the network without requiring any authentication or special privileges.

The vulnerability is accessible via the network attack vector, meaning an attacker does not need local access to the system to exploit it. No user interaction is required beyond normal application usage, making it trivially exploitable in scenarios where the search functionality is exposed.

Root Cause

The root cause of CVE-2018-25245 is improper input validation (though classified under CWE-601 in the CVE data). The application's search functionality lacks adequate bounds checking on input length, failing to implement proper input sanitization or buffer size limitations. When excessively long strings are submitted, the application does not gracefully handle the oversized input, leading to resource exhaustion or memory handling errors that cause the application to crash.

Attack Vector

The attack vector for this vulnerability is network-based. An attacker can exploit this vulnerability by:

1. Accessing the 7 Tik application's search functionality
2. Pasting a specially crafted string of approximately 7700 characters into the search bar
3. Submitting the search query to trigger the crash

The attack requires no authentication and no special privileges, making it accessible to any user who can interact with the application's search feature. The exploitation is straightforward and can be performed with minimal technical knowledge.

Technical details and proof-of-concept information can be found in the Exploit-DB #46197 entry and the VulnCheck Advisory.

Detection Methods for CVE-2018-25245

Indicators of Compromise

• Unexpected application crashes when users interact with the search functionality
• Crash logs indicating memory errors or buffer overflows related to search input processing
• Multiple restart events for the 7 Tik application in a short time period
• User reports of application instability when performing search operations

Detection Strategies

• Monitor application event logs for crash events associated with 7 Tik processes
• Implement input length monitoring at the network or application layer to detect anomalously large search queries
• Deploy endpoint detection solutions like SentinelOne to identify and alert on repeated application crashes
• Review system stability metrics for patterns indicating DoS attack attempts

Monitoring Recommendations

• Enable verbose logging for the 7 Tik application to capture crash details
• Configure alerting thresholds for application restart frequency
• Implement network traffic analysis to identify unusually large HTTP POST requests targeting search endpoints
• Use SentinelOne's behavioral AI to detect patterns consistent with DoS exploitation attempts

How to Mitigate CVE-2018-25245

Immediate Actions Required

• Update 7 Tik to the latest available version if a patched release is available
• Restrict network access to systems running vulnerable versions of 7 Tik where possible
• Implement input validation controls at the network perimeter to limit input string lengths
• Consider temporarily disabling search functionality if the application is business-critical and no patch is available
• Monitor for exploitation attempts using endpoint detection tools

Patch Information

The application is available through the Microsoft Store. Users should check for available updates through the Microsoft Store to obtain any security patches released by the vendor. No specific vendor advisory was available at the time of publication.

Workarounds

• Implement network-level filtering to block requests containing excessively long input strings (greater than 7000 characters)
• Use a web application firewall (WAF) or input validation proxy to enforce maximum input length restrictions
• Restrict access to the application to trusted users only until a patch is available
• Deploy SentinelOne endpoint protection to detect and respond to application crash events that may indicate exploitation attempts

# Example: Input length restriction using iptables string matching (for network-based deployments)
# This is a conceptual example - adjust based on your specific deployment
iptables -A INPUT -p tcp --dport 80 -m string --string "search=" --algo bm -m length --length 8000:65535 -j DROP