7 Tik DoS Vulnerability (CVE-2018-25245)

Overview

CVE-2018-25245 is a denial-of-service (DoS) vulnerability in 7 Tik version 1.0.1.0. The flaw exists in the application’s search functionality, which fails to properly handle input of excessive length. A remote, unauthenticated attacker can exploit this to cause the application to crash.

Vulnerability Details

The core issue is a lack of input validation. The search feature does not enforce a reasonable limit on the length of submitted strings. By pasting a crafted buffer of approximately 7700 characters into the search bar, an attacker can trigger an application crash. The attack is straightforward, requiring no special privileges or user interaction beyond the attacker sending the malicious network request. With an Attack Vector of NETWORK and Attack Complexity of LOW, this vulnerability is highly accessible to attackers.

Impact

Successful exploitation results in a complete denial of service, rendering the 7 Tik application unavailable to legitimate users. While this attack does not permit data theft or code execution, it can disrupt business operations, support functions, or any service reliant on this software. For organizations depending on 7 Tik for critical tasks, even temporary unavailability can have significant operational and financial consequences. You can review the impact of similar disruption events in our archive of breach reports.

Remediation and Mitigation

The primary remediation is to apply an official update from the vendor that addresses this input validation flaw. If a patch is not immediately available, consider the following mitigations:

• Network Controls: Implement network segmentation or firewall rules to restrict access to the affected 7 Tik application to only trusted networks and necessary users.
• Web Application Firewall (WAF): Deploy a WAF in front of the application if it is network-accessible. Configure it to block HTTP requests containing abnormally long strings in parameter fields.
• Monitoring: Monitor application logs for repeated crash events or requests with unusually large payloads targeting the search endpoint.

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Security Insight

This vulnerability is a classic example of a buffer handling flaw in a user-facing feature, a recurring issue in software development. It highlights how even simple functions like search, often an afterthought in security testing, can become a single point of failure. Similar DoS flaws in other applications have historically been among the first to be weaponized in automated attack bots, making prompt patching essential even for non-code-execution vulnerabilities.

Further Reading

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