CVE-2022-42446 in Sametime
Summary
by MITRE • 12/12/2022
Starting with Sametime 12, anonymous users are enabled by default. After logging in as an anonymous user, one has the ability to browse the User Directory and potentially create chats with internal users.
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Analysis
by VulDB Data Team • 01/07/2023
The vulnerability described in CVE-2022-42446 represents a significant security flaw in IBM Sametime 12 software where anonymous user access is enabled by default, creating an unintended pathway for unauthorized discovery and communication within enterprise networks. This configuration issue fundamentally undermines the security boundaries that organizations typically establish to protect their internal user directories and communication channels. The default setting allows any external user to authenticate as an anonymous user and subsequently navigate through the system's user directory, potentially exposing internal user information and enabling unauthorized chat sessions with legitimate internal users.
The technical implementation of this vulnerability stems from the software's default configuration management where anonymous access permissions are not properly restricted or disabled during the initial setup process. When users authenticate as anonymous users, the system does not adequately enforce access controls that would normally prevent directory browsing or chat initiation with internal users. This flaw directly relates to CWE-284 which addresses improper access control mechanisms, specifically the lack of proper authorization checks when anonymous users attempt to access restricted resources within the application. The vulnerability creates a privilege escalation scenario where unauthenticated users can gain access to information and functionality that should remain restricted to authenticated internal users.
The operational impact of this vulnerability extends beyond simple information disclosure, as it enables potential attackers to perform reconnaissance activities by mapping the internal user directory structure and identifying valid user accounts. This information can then be leveraged for further attacks including social engineering, credential harvesting, or targeted phishing campaigns. The ability to create chats with internal users opens additional attack vectors where malicious actors can attempt to establish trust relationships with legitimate employees, potentially leading to more sophisticated attacks such as spear phishing or business email compromise schemes. From an att&ck framework perspective, this vulnerability maps to techniques such as T1087 for account discovery and T1566 for social engineering, as it enables the initial reconnaissance phase that leads to more advanced exploitation tactics.
Organizations implementing Sametime 12 must immediately review their security configurations to disable anonymous user access or implement additional controls to restrict the capabilities available to anonymous users. The recommended mitigations include disabling anonymous user accounts entirely, implementing strict access controls that prevent directory browsing by anonymous users, and configuring network-level restrictions to limit the exposure of the Sametime server to unauthorized external access. Security teams should also implement monitoring solutions to detect unusual patterns of directory access or chat initiation by anonymous users, as these activities could indicate exploitation attempts. Additionally, regular security assessments should be conducted to ensure that default configurations are properly reviewed and hardened according to organizational security policies and industry best practices for secure system administration.