CVE-2007-4160 in Rendezvous
Summary
by MITRE
The default configuration of TIBCO Rendezvous (RV) 7.5.2 clients, when -no-multicast is omitted, uses a multicast group as the destination for a network message, which might make it easier for remote attackers to capture message contents by sniffing the network.
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Analysis
by VulDB Data Team • 09/06/2018
The vulnerability described in CVE-2007-4160 pertains to the default configuration behavior of TIBCO Rendezvous version 7.5.2 clients that lack proper network security considerations. This issue represents a fundamental flaw in the software's network communication design where the system automatically defaults to multicast group communication without explicit configuration by the administrator. The vulnerability stems from the absence of a mandatory parameter -no-multicast which would prevent the client from using multicast addressing for message distribution. When this parameter is omitted, the system automatically routes messages through multicast groups, creating an unintended network exposure that compromises the confidentiality of transmitted data.
The technical implementation of this vulnerability involves the network stack's handling of message routing within the TIBCO Rendezvous framework. Multicast communication, while efficient for certain distributed applications, creates a security risk when not properly configured because it allows any network entity within the multicast domain to monitor and capture transmitted messages. This behavior directly violates the principle of least privilege and creates an attack surface that aligns with CWE-200, which addresses information exposure through improper information gathering. The flaw essentially transforms a potentially secure point-to-point or unicast communication channel into a broadcast medium that exposes sensitive information to any network observer with appropriate monitoring capabilities.
From an operational impact perspective, this vulnerability enables remote attackers to perform passive network sniffing operations and capture message contents without requiring elevated privileges or complex exploitation techniques. The attack vector is particularly concerning because it does not require authentication or direct system access, making it accessible to any network entity that can monitor the relevant network segments. This weakness significantly undermines the security posture of organizations relying on TIBCO Rendezvous for mission-critical communications, as it creates an implicit backdoor for information disclosure. The vulnerability's impact is amplified by the fact that it operates at the network protocol level, making detection difficult and remediation complex due to the widespread nature of multicast-based communication patterns.
The security implications extend beyond simple information disclosure to encompass potential compromise of business-critical data flows within enterprise environments. Network monitoring tools such as tcpdump or Wireshark can easily capture multicast traffic, exposing sensitive information including transaction data, system status updates, and potentially authentication credentials or operational parameters. This vulnerability aligns with ATT&CK technique T1046, which covers network service scanning and information gathering through passive network monitoring. Organizations may not immediately recognize this issue due to its indirect nature, as the vulnerability only manifests when multicast communication is used without explicit configuration controls. The remediation approach requires administrators to explicitly configure the -no-multicast parameter and implement proper network segmentation to prevent unauthorized access to multicast domains. Additionally, this vulnerability highlights the importance of secure configuration management practices and demonstrates how default settings can create security weaknesses that persist across multiple deployments without explicit intervention by system administrators.