CVE-2000-0398 in MailSite
Summary
by MITRE
Buffer overflow in wconsole.dll in Rockliffe MailSite Management Agent allows remote attackers to execute arbitrary commands via a long query_string parameter in the HTTP GET request.
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Analysis
by VulDB Data Team • 04/21/2026
The vulnerability identified as CVE-2000-0398 represents a critical buffer overflow flaw within the wconsole.dll component of Rockliffe MailSite Management Agent software. This issue manifests specifically when processing HTTP GET requests containing excessively long query_string parameters, creating a potential pathway for remote code execution. The vulnerability resides in the management agent's handling of user-supplied input, where insufficient bounds checking allows maliciously crafted payloads to overwrite adjacent memory locations in the application's execution context.
The technical implementation of this buffer overflow stems from improper input validation within the MailSite Management Agent's web console functionality. When the system processes an HTTP GET request with a query_string parameter exceeding allocated buffer boundaries, the excess data overflows into adjacent memory regions, potentially corrupting critical program structures including return addresses and function pointers. This memory corruption can be exploited by attackers to redirect program execution flow and inject malicious code that executes with the privileges of the affected service account. The vulnerability operates at the application layer and requires no authentication for exploitation, making it particularly dangerous in networked environments where the management agent is accessible over HTTP.
The operational impact of this vulnerability extends beyond simple remote code execution to encompass complete system compromise and potential lateral movement within networked environments. Attackers leveraging this flaw could gain unauthorized access to email server configurations, manipulate email routing, or establish persistent backdoors within the mail infrastructure. The vulnerability affects organizations relying on Rockliffe MailSite Management Agent for email server administration, potentially exposing sensitive email communications and compromising the integrity of email services. Given that the flaw exists in the management agent's web interface, it could be exploited by attackers from external network positions, making it a significant threat to organizations with exposed mail server management interfaces.
Mitigation strategies for CVE-2000-0398 should prioritize immediate patching of affected systems through vendor-provided security updates or software upgrades. Organizations should implement network segmentation to restrict access to the MailSite Management Agent's web interface, limiting exposure to only trusted administrative networks. Input validation measures including length restrictions on query_string parameters and enhanced monitoring of HTTP traffic should be deployed to detect and prevent exploitation attempts. The vulnerability aligns with CWE-121, which addresses stack-based buffer overflow conditions, and represents a classic example of how improper input handling can lead to arbitrary code execution. From an ATT&CK framework perspective, this vulnerability maps to T1059.007 for command and scripting interpreter and T1190 for exploit for known vulnerabilities, emphasizing the need for comprehensive vulnerability management and network security controls to prevent exploitation.