CVE-2014-3221 in Eudemon8000E
Summary
by MITRE
Huawei Eudemon8000E firewall with software V200R001C01SPC800 and earlier versions allows users to log in to the device using Telnet or SSH. When an attacker sends to the device a mass of TCP packets with special structure, the logging process becomes slow and users may be unable to log in to the device.
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Analysis
by VulDB Data Team • 11/24/2022
The vulnerability identified as CVE-2014-3221 affects Huawei Eudemon8000E firewalls running software versions V200R001C01SPC800 and earlier, representing a significant denial of service weakness that impacts the device's authentication and logging capabilities. This vulnerability specifically targets the firewall's handling of TCP packets during the logging process, creating a scenario where legitimate users may be unable to establish connections via Telnet or SSH protocols. The flaw demonstrates a critical design oversight in the firewall's packet processing and resource management systems, particularly within the logging subsystem that handles authentication events.
The technical implementation of this vulnerability stems from the firewall's insufficient validation and processing of specially crafted TCP packets that trigger excessive logging operations. When an attacker floods the device with these structured packets, the logging mechanism becomes overwhelmed and enters a state of performance degradation that can ultimately prevent legitimate authentication attempts. This behavior aligns with CWE-400, which categorizes the vulnerability as a resource exhaustion issue where the system's logging subsystem consumes excessive computational resources. The attack vector specifically exploits the firewall's TCP packet handling logic, where malformed or specially constructed packets cause the device to spend disproportionate processing time on logging operations rather than normal network functions.
The operational impact of this vulnerability extends beyond simple service disruption to potentially compromise the entire security posture of the network infrastructure. When users cannot log in to the firewall through legitimate channels, network administrators lose critical access to configure and monitor security policies, creating a window of vulnerability where the firewall may be unable to enforce its security rules. This scenario directly relates to ATT&CK technique T1499.004, which involves network disruption attacks that target network infrastructure devices. The vulnerability creates a cascading effect where the device's core functionality becomes compromised, potentially allowing attackers to bypass security controls or remain undetected while the device is in a degraded state.
Mitigation strategies for CVE-2014-3221 should focus on both immediate protective measures and long-term architectural improvements. Organizations should implement network segmentation and access control policies that limit the exposure of these firewalls to untrusted networks, while also applying firmware updates to versions that address the logging process vulnerability. Network monitoring systems should be configured to detect unusual patterns of TCP packet traffic that may indicate an attack attempt, and rate limiting mechanisms should be deployed to prevent the flooding of logging processes. Additionally, implementing redundant authentication methods and maintaining offline backup access procedures ensures that administrators can maintain control over the network infrastructure even when the primary access methods are compromised. The vulnerability highlights the importance of robust input validation and resource management in network security devices, as outlined in industry best practices for secure network architecture design.