CVE-2016-2969 in Sametime Meeting Server
Summary
by MITRE
IBM Sametime Meeting Server 8.5.2 and 9.0 may send replies that contain emails of people that should not be in these messages. IBM X-Force ID: 113850.
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Analysis
by VulDB Data Team • 01/10/2021
The vulnerability identified as CVE-2016-2969 affects IBM Sametime Meeting Server versions 8.5.2 and 9.0, representing a significant information disclosure flaw that could compromise user privacy and data integrity. This issue stems from improper access control mechanisms within the meeting server's reply functionality, allowing unauthorized individuals to gain access to email addresses and potentially sensitive communication data. The vulnerability specifically manifests when the system processes meeting replies, where it fails to properly validate recipient permissions and access levels, creating a pathway for information leakage that violates fundamental security principles of least privilege and access control.
The technical implementation of this vulnerability resides in the server's email processing and recipient validation logic within the meeting reply system. When users participate in meetings and generate replies, the system incorrectly includes email addresses of participants who should not normally be visible to the sender or other meeting attendees. This flaw operates at the application layer and represents a classic case of inadequate input validation and access control enforcement. The vulnerability can be categorized under CWE-200, Information Exposure, and more specifically aligns with CWE-284, Improper Access Control, as the system fails to properly enforce access restrictions on sensitive user data. The flaw essentially allows for unauthorized data enumeration and disclosure through the meeting reply mechanism.
From an operational impact perspective, this vulnerability creates substantial risks for organizations relying on IBM Sametime for secure communications. The unauthorized exposure of email addresses can lead to social engineering attacks, targeted phishing campaigns, and increased attack surface for malicious actors. Attackers could leverage this information to conduct spear-phishing attacks against employees, map organizational structures, or identify potential targets for further exploitation. The vulnerability undermines the trust model of the communication platform and could result in compliance violations for organizations subject to data protection regulations such as gdpr or hipaa. The impact extends beyond immediate information disclosure to potentially enable broader reconnaissance activities and privilege escalation attempts within the organization's communication infrastructure.
Organizations should implement immediate mitigations including applying the relevant IBM security patches and updates released for this vulnerability, as well as configuring additional access controls and monitoring within their Sametime environments. Network segmentation and firewall rules should be reviewed to limit access to the meeting server components, while comprehensive logging and monitoring should be implemented to detect unauthorized access patterns. Security teams should conduct thorough assessments of their communication infrastructure to identify potential exploitation vectors and ensure that proper access controls are enforced across all meeting and collaboration features. The remediation process should also include user awareness training to recognize potential social engineering attempts that could exploit the leaked information. Additionally, organizations should consider implementing additional security controls such as email filtering and monitoring solutions to detect and prevent unauthorized information disclosure attempts. This vulnerability demonstrates the critical importance of proper access control implementation in collaborative platforms and highlights the need for comprehensive security testing of communication systems to prevent similar issues in the future.