CVE-2015-8601 in Chat Room Module
Summary
by MITRE
The Chat Room module 7.x-2.x before 7.x-2.2 for Drupal does not properly check permissions when setting up a websocket for chat messages, which allows remote attackers to bypass intended access restrictions and read messages from arbitrary Chat Rooms via unspecified vectors.
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Analysis
by VulDB Data Team • 05/08/2018
The vulnerability identified as CVE-2015-8601 affects the Chat Room module version 7.x-2.x prior to 7.x-2.2 within the Drupal content management system ecosystem. This security flaw represents a critical authorization bypass issue that fundamentally compromises the integrity of chat room communications by failing to enforce proper access controls during websocket connection establishment. The vulnerability exists within the module's permission validation mechanism, specifically during the websocket setup process where chat messages are transmitted between clients and the server. Attackers can exploit this weakness to gain unauthorized access to chat room conversations that they should not be permitted to view, effectively undermining the confidentiality and privacy of user communications within the Drupal platform.
The technical implementation of this vulnerability stems from inadequate input validation and permission checking during the websocket handshake process within the Chat Room module. When users attempt to establish a websocket connection for chat functionality, the module fails to properly authenticate and authorize the requesting user against the intended chat room access controls. This weakness allows malicious actors to manipulate the websocket connection parameters or exploit the module's insufficient validation logic to access chat rooms that are restricted to specific user groups or roles. The unspecified vectors mentioned in the description suggest that the attack could potentially occur through various manipulation techniques including but not limited to parameter tampering, session manipulation, or exploitation of the module's websocket connection handling routines.
From an operational impact perspective, this vulnerability creates significant security risks for organizations relying on Drupal's Chat Room module for collaborative communications, internal messaging, or user interaction platforms. Remote attackers can exploit this flaw to access sensitive information from arbitrary chat rooms, potentially including confidential business discussions, personal communications, or privileged information shared within restricted groups. The vulnerability affects the fundamental security model of the chat system, as it allows unauthorized users to bypass the intended access control mechanisms that should prevent them from viewing messages in chat rooms to which they do not have legitimate access. This compromise directly violates the principle of least privilege and can lead to data leakage, privacy violations, and potential escalation of attacks within the broader Drupal environment.
The vulnerability aligns with CWE-285, which addresses improper authorization issues in software systems, and demonstrates characteristics consistent with privilege escalation and access control bypass patterns found in the MITRE ATT&CK framework under the technique of privilege escalation. Organizations should immediately implement the recommended patch updates to version 7.x-2.2 or later, which contain the necessary permission validation fixes for websocket connections. Additionally, security administrators should conduct comprehensive audits of all Drupal installations using the Chat Room module to identify and remediate any potential exploitation attempts. Network monitoring should be enhanced to detect unusual websocket connection patterns, and access logs should be reviewed for signs of unauthorized access attempts. The module's configuration should be reviewed to ensure that proper role-based access controls are enforced, and organizations should consider implementing additional network segmentation measures to limit the potential impact of such vulnerabilities within their broader infrastructure.