CVE-2002-0679 in Dextop
Summary
by MITRE
Buffer overflow in Common Desktop Environment (CDE) ToolTalk RPC database server (rpc.ttdbserverd) allows remote attackers to execute arbitrary code via an argument to the _TT_CREATE_FILE procedure.
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Analysis
by VulDB Data Team • 09/14/2025
The vulnerability identified as CVE-2002-0679 represents a critical buffer overflow flaw within the Common Desktop Environment ToolTalk RPC database server component known as rpc.ttdbserverd. This issue affects the widely deployed CDE framework that was prevalent in Unix-based operating systems during the early 2000s. The vulnerability specifically manifests within the _TT_CREATE_FILE procedure, which serves as a remote procedure call interface for file creation operations within the ToolTalk environment. The flaw stems from insufficient input validation and boundary checking mechanisms within the server daemon, allowing maliciously crafted arguments to overflow allocated memory buffers and potentially overwrite adjacent memory regions.
The technical implementation of this vulnerability involves the rpc.ttdbserverd daemon processing untrusted input data through the ToolTalk RPC interface without adequate sanitization measures. When a remote attacker submits a specially crafted argument to the _TT_CREATE_FILE procedure, the server fails to properly validate the length of the input data against the allocated buffer space. This condition creates a classic stack-based buffer overflow scenario where the excessive data overflows into adjacent memory locations, potentially corrupting the instruction pointer or other critical program variables. The vulnerability is classified under CWE-121 as a stack-based buffer overflow, which directly enables arbitrary code execution capabilities for remote attackers. The ATT&CK framework categorizes this as a remote code execution technique leveraging network services, specifically mapping to the T1203 technique for exploitation of remote services through malformed inputs.
The operational impact of CVE-2002-0679 extends beyond simple privilege escalation to encompass complete system compromise when exploited successfully. Remote attackers can leverage this vulnerability to execute malicious code with the privileges of the rpc.ttdbserverd process, which typically runs with elevated permissions due to its role in the desktop environment infrastructure. The attack vector requires only network connectivity to the target system's RPC service port, making it particularly dangerous for systems exposed to untrusted networks. Successful exploitation could result in persistent backdoor access, data exfiltration, or further lateral movement within the network infrastructure. Organizations running CDE environments were particularly vulnerable since the rpc.ttdbserverd daemon was often left running and accessible to remote clients without proper access controls.
Mitigation strategies for this vulnerability require immediate patching of the affected CDE components through vendor-provided security updates or system upgrades. System administrators should disable or firewall access to the ToolTalk RPC services when not actively required, particularly on systems exposed to public networks. Network segmentation and access control measures can provide additional defense-in-depth layers to prevent unauthorized access to the vulnerable RPC endpoints. Regular security auditing of Unix-based systems should include verification of CDE installation status and active RPC service configurations. The vulnerability serves as a prime example of why input validation and memory safety practices are critical in network services, and why legacy desktop environments often require careful security maintenance. Organizations should also consider implementing intrusion detection systems to monitor for suspicious RPC traffic patterns that might indicate exploitation attempts against this and similar vulnerabilities.