CVE-2000-0447 in WebShield SMTP
Summary
by MITRE
Buffer overflow in WebShield SMTP 4.5.44 allows remote attackers to execute arbitrary commands via a long configuration parameter to the WebShield remote management service.
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Analysis
by VulDB Data Team • 10/14/2025
The vulnerability described in CVE-2000-0447 represents a critical buffer overflow flaw within the WebShield SMTP 4.5.44 security solution that enables remote code execution through manipulation of the remote management service. This issue arises from insufficient input validation mechanisms within the software's configuration parameter handling, specifically when processing long configuration strings sent to the WebShield remote management service. The buffer overflow occurs when the application fails to properly check the length of incoming data before copying it into fixed-length memory buffers, creating a condition where attacker-controlled data can overwrite adjacent memory locations including return addresses and executable code segments.
The technical exploitation of this vulnerability leverages standard buffer overflow attack methodologies where an attacker crafts a malicious configuration parameter containing excessive data that exceeds the allocated buffer size. When the WebShield service processes this oversized parameter, the overflow corrupts the program's execution flow by overwriting the stack frame, potentially allowing an attacker to inject and execute arbitrary code with the privileges of the WebShield service account. This type of vulnerability falls under CWE-121, which specifically addresses stack-based buffer overflow conditions, and aligns with ATT&CK technique T1059.007 for command and scripting interpreter. The remote nature of the attack means that no local access is required, making the vulnerability particularly dangerous as it can be exploited from any network location with access to the WebShield management service port.
The operational impact of this vulnerability extends beyond simple code execution to encompass complete system compromise and potential lateral movement within network environments. Organizations relying on WebShield for email security face significant risk as attackers could gain unauthorized access to the management interface, potentially leading to email traffic interception, spam relay, or complete service disruption. The vulnerability affects systems where WebShield SMTP 4.5.44 is deployed, particularly those exposed to untrusted networks or with default configurations that do not properly restrict access to the remote management service. Given the age of this vulnerability and the widespread use of WebShield products, many organizations may still be running affected versions, creating a persistent threat landscape.
Mitigation strategies for CVE-2000-0447 should prioritize immediate patching of affected WebShield installations to the latest available versions that address the buffer overflow condition. Network segmentation and access control measures should be implemented to restrict access to the WebShield remote management service to trusted administrative networks only, utilizing firewalls to block external access to the management ports. Additionally, implementing network monitoring and intrusion detection systems can help identify exploitation attempts through unusual traffic patterns or malformed configuration requests. Security hardening practices including disabling unnecessary services, implementing strong authentication mechanisms, and regular security audits should be conducted to reduce the attack surface. Organizations should also consider deploying web application firewalls to filter potentially malicious input before it reaches the vulnerable service, and establish incident response procedures to quickly address any exploitation attempts that may occur despite preventive measures.