CVE-2000-0341 in Cassandra NNTPServer
Summary
by MITRE
ATRIUM Cassandra NNTP Server 1.10 allows remote attackers to cause a denial of service via a long login name.
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Analysis
by VulDB Data Team • 10/16/2025
The vulnerability identified as CVE-2000-0341 affects the ATRIUM Cassandra NNTP Server version 1.10, presenting a significant security weakness that can be exploited by remote attackers to disrupt service availability. This issue stems from inadequate input validation mechanisms within the server's authentication process, specifically when handling user login credentials. The flaw manifests when an attacker submits an excessively long login name to the NNTP server, triggering unexpected behavior that leads to system instability and eventual denial of service conditions.
The technical nature of this vulnerability aligns with CWE-120, which encompasses buffer overflow conditions where insufficient bounds checking allows attackers to write beyond allocated memory buffers. In this case, the extended login name parameter likely overflows the server's internal buffer allocated for storing authentication credentials, causing the application to crash or become unresponsive. The vulnerability represents a classic example of insufficient input sanitization that can be exploited through simple network-based attacks without requiring authentication or specialized privileges.
From an operational perspective, this vulnerability presents a substantial risk to organizations relying on NNTP services for email distribution or news group functionality. The denial of service impact can severely disrupt communication systems, particularly in environments where email services depend on NNTP protocols for message handling. Attackers can exploit this weakness with minimal effort, making it an attractive target for malicious actors seeking to disrupt network services. The vulnerability affects the availability aspect of the CIA triad, potentially causing cascading effects on downstream applications that depend on the NNTP service for proper operation.
The attack surface for this vulnerability extends to any network environment where the affected ATRIUM Cassandra NNTP Server version 1.10 is deployed, particularly in enterprise settings where news group services or email distribution systems are operational. Organizations using this specific server version should immediately assess their exposure and implement appropriate mitigations. The vulnerability demonstrates the importance of proper input validation and buffer management in network services, aligning with ATT&CK technique T1499 which covers network denial of service attacks. Mitigation strategies should include immediate patching of the server software, implementation of input length restrictions, and network-level filtering to prevent excessive data transmission to the affected service. Additionally, organizations should consider deploying intrusion detection systems to monitor for suspicious login attempts that might indicate exploitation attempts against this vulnerability.