CVE-2018-25040 in Web
Summary
by MITRE • 06/17/2022
A vulnerability was found in uTorrent Web. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the component HTTP RPC Server. The manipulation leads to privilege escalation. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. It is recommended to upgrade the affected component.
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Analysis
by VulDB Data Team • 02/10/2023
The vulnerability identified as CVE-2018-25040 represents a critical privilege escalation flaw within the uTorrent Web HTTP RPC Server component. This vulnerability exposes a fundamental security weakness in the web-based torrent client interface that allows unauthorized users to gain elevated privileges within the system. The affected functionality resides within the HTTP Remote Procedure Call server implementation, which serves as the primary communication interface between the web client and the underlying torrent daemon. The flaw enables attackers to manipulate the system's access controls and elevate their privileges from standard user level to administrative or root level access, creating a severe security risk for systems running vulnerable versions of uTorrent Web.
The technical exploitation of this vulnerability occurs through remote attack vectors, meaning that malicious actors do not require physical access to the target system or local network presence to carry out the attack. The HTTP RPC Server component typically handles API requests from web browsers and other HTTP clients, making it a prime target for remote exploitation. Attackers can leverage this flaw by crafting specific HTTP requests that manipulate the authentication and authorization mechanisms within the RPC server, potentially allowing them to execute arbitrary commands with elevated privileges. This remote exploitation capability significantly broadens the attack surface and increases the potential impact of the vulnerability.
The operational impact of CVE-2018-25040 extends beyond simple privilege escalation, as it can enable complete system compromise and unauthorized access to sensitive data. Once an attacker achieves privilege escalation through this vulnerability, they can potentially access, modify, or delete files, install malware, monitor network traffic, and establish persistent access to the compromised system. The vulnerability's classification as critical indicates that it can be exploited without requiring specialized skills or extensive reconnaissance, making it particularly dangerous for organizations that deploy uTorrent Web in production environments. The fact that public exploitation methods have been disclosed further amplifies the risk, as threat actors can readily implement these techniques against vulnerable systems.
Security professionals should immediately implement mitigations including upgrading to patched versions of uTorrent Web, as recommended by the vendor. Organizations should also consider implementing network segmentation to isolate systems running uTorrent Web from critical infrastructure, and deploy intrusion detection systems to monitor for suspicious HTTP RPC server activity. The vulnerability aligns with CWE-269: "Improper Privilege Management" and can be mapped to ATT&CK technique T1068: "Exploitation for Privilege Escalation" within the adversary tactics and techniques framework. Additionally, this vulnerability demonstrates the importance of secure API design and proper access control implementation in web-based applications, particularly those handling sensitive functionality such as file operations and system management tasks. Organizations should conduct immediate vulnerability assessments to identify all systems running affected versions and implement comprehensive monitoring for potential exploitation attempts.