CVE-2007-2418 in Trillian Pro
Summary
by MITRE
Heap-based buffer overflow in the Rendezvous / Extensible Messaging and Presence Protocol (XMPP) component (plugins\rendezvous.dll) for Cerulean Studios Trillian Pro before 3.1.5.1 allows remote attackers to execute arbitrary code via a message that triggers the overflow from expansion that occurs during encoding.
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Analysis
by VulDB Data Team • 08/02/2019
The vulnerability identified as CVE-2007-2418 represents a critical heap-based buffer overflow affecting Cerulean Studios Trillian Pro messaging client version 3.1.4.1 and earlier. This flaw resides within the Rendezvous component, specifically in the plugins/rendezvous.dll module, which handles the Extensible Messaging and Presence Protocol implementation. The vulnerability manifests when the application processes specially crafted XMPP messages that trigger an overflow during the encoding expansion phase, creating a condition where attacker-controlled data can overwrite adjacent memory locations in the heap memory space.
The technical exploitation of this vulnerability occurs through a carefully constructed XMPP message that, when processed by the vulnerable Trillian Pro client, causes the application to allocate insufficient buffer space for the message expansion operation. During the encoding process, the application attempts to expand the message content beyond the allocated heap buffer boundaries, leading to memory corruption that can be leveraged by remote attackers to execute arbitrary code with the privileges of the affected user. This type of heap overflow vulnerability falls under CWE-121, heap-based buffer overflow, which is classified as a critical weakness in memory safety.
The operational impact of this vulnerability extends beyond simple code execution, as it provides attackers with a means to completely compromise the affected system. Since Trillian Pro is a widely used instant messaging client that often runs with elevated privileges, successful exploitation could result in unauthorized access to sensitive communications, potential data exfiltration, and establishment of persistent backdoors. The vulnerability affects users who are connected to XMPP networks and receive messages from untrusted sources, making it particularly dangerous in enterprise environments where instant messaging is extensively used for internal communications.
Mitigation strategies for this vulnerability require immediate patching of Trillian Pro to version 3.1.5.1 or later, which contains the necessary fixes for the buffer overflow condition. Organizations should also implement network-level controls to filter suspicious XMPP traffic and consider deploying intrusion detection systems that can identify potential exploitation attempts. From a defensive perspective, this vulnerability aligns with ATT&CK technique T1059.007 for command and control through instant messaging protocols, and T1203 for exploitation of software vulnerabilities. The security community should also consider implementing application whitelisting policies that restrict execution of untrusted XMPP message handlers and ensure proper input validation for all messaging components to prevent similar issues in other instant messaging platforms.