CVE-2018-15682 in XBTIT
Summary
by MITRE
An issue was discovered in BTITeam XBTIT. Due to a lack of cross-site request forgery protection, it is possible to automate the action of sending private messages to users by luring an authenticated user to a web page that automatically submits a form on their behalf.
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Analysis
by VulDB Data Team • 03/20/2020
The vulnerability identified as CVE-2018-15682 resides within BTITeam XBTIT, a popular BitTorrent tracker software implementation that has been widely deployed across various torrenting communities. This flaw represents a critical security weakness that directly impacts the integrity and confidentiality of user communications within the platform. The vulnerability stems from insufficient validation mechanisms that should have been implemented to prevent unauthorized automated actions from being executed on behalf of authenticated users. The absence of proper cross-site request forgery protection creates a pathway for malicious actors to exploit the trust relationship between legitimate users and the application.
This vulnerability manifests as a classic cross-site request forgery (CSRF) attack vector where an attacker can craft a malicious webpage that automatically submits private message forms without the user's knowledge or consent. The technical flaw lies in the application's failure to implement anti-CSRF tokens or other validation mechanisms that would ensure that requests originate from the legitimate application interface rather than from external malicious sites. When an authenticated user visits the attacker-controlled webpage, the browser automatically submits the private message form to the target application, potentially flooding users with unwanted communications or even attempting to exploit other functionality within the application. This type of vulnerability falls under CWE-352, which specifically addresses Cross-Site Request Forgery weaknesses in software applications.
The operational impact of this vulnerability extends beyond simple spamming of private messages, as it represents a fundamental breach in the application's security model that could enable more sophisticated attacks. An attacker could potentially use this vector to send phishing messages, spread malware through malicious links in private messages, or even attempt to manipulate user accounts by triggering various application functions. The vulnerability affects all authenticated users of the BTITeam XBTIT platform, making it particularly dangerous given the widespread adoption of this software. The automated nature of the attack means that users cannot easily defend against it through simple awareness, as the malicious page must be visited for the attack to succeed. This vulnerability directly relates to ATT&CK technique T1566 which covers social engineering tactics, specifically focusing on the manipulation of users into executing actions that compromise their systems.
The mitigation strategies for this vulnerability require immediate implementation of proper CSRF protection mechanisms within the application. The most effective approach involves implementing unique, unpredictable tokens that are generated for each user session and validated on every state-changing request. These tokens should be embedded within forms and validated server-side to ensure that requests originate from legitimate application interfaces. Additionally, the application should implement strict referer header validation and utilize the SameSite cookie attributes to prevent cross-site requests from being automatically submitted. Organizations using BTITeam XBTIT should also consider implementing additional monitoring mechanisms to detect unusual patterns of private message activity that might indicate automated attacks. The vulnerability demonstrates the critical importance of implementing comprehensive security controls even for seemingly simple application functions, as the lack of CSRF protection can lead to significant compromise of user privacy and application integrity.