CVE-2000-0488 in Mail Server
Summary
by MITRE
Buffer overflow in ITHouse mail server 1.04 allows remote attackers to execute arbitrary commands via a long RCPT TO mail command.
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Analysis
by VulDB Data Team • 10/14/2025
The vulnerability described in CVE-2000-0488 represents a critical buffer overflow flaw within the ITHouse mail server version 1.04 that exposes remote attackers to potential command execution capabilities. This issue specifically manifests when processing the RCPT TO mail command, which is part of the standard smtp protocol used for mail delivery. The buffer overflow occurs when the server receives a malformed recipient address that exceeds the allocated buffer space, allowing malicious input to overwrite adjacent memory locations.
This technical flaw falls under the CWE-121 category of buffer overflow conditions, specifically manifesting as a stack-based buffer overflow that can be exploited through network-based attacks. The vulnerability operates at the application layer of the network stack, making it particularly dangerous as it requires no local access or authentication to exploit. The RCPT TO command serves as the attack vector because it represents a legitimate function within the smtp protocol that the mail server must process, making the exploitation relatively straightforward for attackers who understand the smtp protocol structure.
The operational impact of this vulnerability extends beyond simple command execution to encompass complete system compromise. Successful exploitation allows attackers to execute arbitrary code with the privileges of the mail server process, which typically runs with elevated permissions to handle mail operations. This can lead to unauthorized access to mail queues, modification or deletion of email messages, potential data exfiltration, and establishment of persistent backdoors within the network infrastructure. The vulnerability affects organizations relying on ITHouse mail server implementations, potentially compromising email communications and exposing sensitive data.
Mitigation strategies for this vulnerability require immediate patching of the ITHouse mail server software to the latest available version that addresses the buffer overflow condition. Network administrators should implement proper input validation and length checking mechanisms to prevent malformed data from reaching the vulnerable code paths. Additionally, deploying network segmentation and access controls can limit the potential impact if exploitation occurs. The vulnerability aligns with ATT&CK technique T1203, which covers exploitation for execution through buffer overflow attacks, and demonstrates the importance of proper software security practices in network infrastructure components. Organizations should also consider implementing intrusion detection systems to monitor for suspicious smtp traffic patterns that might indicate exploitation attempts.