CVE-2002-0431 in XTux
Summary
by MITRE
XTux allows remote attackers to cause a denial of service (CPU consumption) via random inputs in the initial connection.
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Analysis
by VulDB Data Team • 11/10/2024
The vulnerability identified as CVE-2002-0431 affects XTux, a network service that becomes susceptible to denial of service attacks through carefully crafted random inputs during the initial connection phase. This weakness represents a classic resource exhaustion attack vector where malicious actors can exploit the service's handling of unexpected input data to consume excessive cpu cycles and ultimately render the system unavailable to legitimate users. The vulnerability specifically targets the service's connection initialization process, indicating that the flaw exists in how XTux processes incoming connection requests before establishing proper communication channels.
From a technical perspective, this vulnerability demonstrates poor input validation and error handling mechanisms within the XTux service implementation. The service fails to properly sanitize or limit the processing of random input data during connection establishment, allowing attackers to craft malformed packets or sequences that trigger excessive computational overhead. This type of vulnerability aligns with CWE-20, which addresses improper input validation, and represents a form of resource exhaustion attack that consumes system processing power without necessarily causing system crashes. The attack vector operates at the network protocol level where the service's initial handshake process becomes a point of weakness.
The operational impact of this vulnerability extends beyond simple service disruption to potentially affect broader network availability and system performance. When exploited, the denial of service attack can cause sustained high cpu utilization, leading to system instability and preventing legitimate users from establishing connections to the XTux service. This vulnerability particularly affects environments where XTux serves critical network functions or where resource constraints are already present, as the attack can quickly escalate from minor performance degradation to complete service unavailability. The attack requires minimal sophistication from threat actors, making it a preferred vector for automated or opportunistic attacks.
Mitigation strategies for CVE-2002-0431 should focus on implementing robust input validation and rate limiting mechanisms at the network level. Network administrators should configure firewalls and intrusion detection systems to monitor for unusual connection patterns and implement connection throttling to prevent resource exhaustion attacks. The service should be updated to properly validate all initial connection inputs and implement timeouts to prevent indefinite processing of malformed requests. Additionally, system monitoring should be enhanced to detect unusual cpu utilization patterns that may indicate exploitation attempts. This vulnerability underscores the importance of implementing the principle of least privilege and proper error handling in network services, as outlined in various cybersecurity frameworks including those referenced in the mitre att&ck framework under defensive techniques related to resource exhaustion and input validation.