CVE-2000-0452 in Domino Enterprise Server
Summary
by MITRE
Buffer overflow in the ESMTP service of Lotus Domino Server 5.0.1 allows remote attackers to cause a denial of service via a long MAIL FROM command.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 10/14/2025
The vulnerability identified as CVE-2000-0452 represents a critical buffer overflow flaw within the ESMTP service of IBM Lotus Domino Server version 5.0.1. This issue resides in the handling of the MAIL FROM command, which is a fundamental component of the Simple Mail Transfer Protocol used for email transmission. The buffer overflow occurs when the server receives an excessively long MAIL FROM command, causing the application to write data beyond the allocated memory buffer space. This fundamental memory management error creates a condition where attacker-controlled input can overwrite adjacent memory locations, potentially leading to unpredictable behavior and system instability.
The technical exploitation of this vulnerability demonstrates a classic buffer overflow attack pattern that aligns with CWE-121, which describes heap-based buffer overflow conditions. The flaw specifically affects the ESMTP service implementation within Lotus Domino Server, making it a target for remote attackers who can leverage this weakness without requiring authentication or local access. When a maliciously crafted MAIL FROM command exceeds the buffer capacity, the overflow can corrupt the program's execution flow, leading to application crashes or potentially allowing for more sophisticated attack vectors. The vulnerability exists in the server's input validation mechanisms, where insufficient bounds checking permits arbitrary data length to be processed without proper sanitization.
From an operational impact perspective, this vulnerability creates significant risk for organizations relying on Lotus Domino Server for email services. The primary consequence is a denial of service condition that can render email services unavailable to legitimate users, disrupting business communications and potentially causing substantial operational downtime. The remote nature of the attack means that adversaries can exploit this flaw from anywhere on the network, making it particularly dangerous for organizations with exposed email servers. While the immediate impact appears to be denial of service rather than arbitrary code execution, the potential for escalation exists, especially when considering the broader attack surface that buffer overflows can provide. The vulnerability affects organizations using the specific version 5.0.1 of the server, highlighting the importance of keeping email infrastructure updated with security patches.
Mitigation strategies for this vulnerability should focus on immediate patching of the Lotus Domino Server software to the latest available version that addresses this buffer overflow condition. Organizations should implement network segmentation and access controls to limit exposure of the ESMTP service to untrusted networks, following principles outlined in the attack chain framework of the MITRE ATT&CK methodology. Network-based intrusion detection systems can be configured to monitor for suspicious MAIL FROM command patterns that exceed normal operational parameters, providing early warning capabilities. Additionally, implementing proper input validation and length checking mechanisms within email server configurations can help reduce the attack surface. Security teams should also consider disabling unnecessary email services and implementing rate limiting to prevent exploitation attempts. The vulnerability underscores the importance of maintaining up-to-date security patches and following the principle of least privilege in email server configurations to minimize the impact of such flaws. Organizations should conduct regular vulnerability assessments and penetration testing to identify similar buffer overflow conditions in other server applications and network services.