CVE-2020-1847 in NIP6300
Summary
by MITRE • 11/13/2020
There is a denial of service vulnerability in some Huawei products. There is no protection against the attack scenario of specific protocol. A remote, unauthorized attackers can construct attack scenarios, which leads to denial of service.Affected product versions include:NIP6300 versions V500R001C30,V500R001C60;NIP6600 versions V500R001C30,V500R001C60;Secospace USG6300 versions V500R001C30,V500R001C60;Secospace USG6500 versions V500R001C30,V500R001C60;Secospace USG6600 versions V500R001C30,V500R001C60;USG9500 versions V500R001C30,V500R001C60.
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Analysis
by VulDB Data Team • 12/07/2020
This vulnerability represents a critical denial of service weakness in Huawei network security appliances that affects multiple product lines including NIP series and Secospace USG series devices. The flaw stems from insufficient protection mechanisms against specific protocol attack scenarios, creating a pathway for remote unauthorized actors to exploit the system. The vulnerability exists within the protocol handling logic of these network security devices, where proper validation and sanitization of incoming protocol data is lacking. Attackers can construct specially crafted packets or sequences that trigger the device to enter an unstable state, ultimately resulting in service disruption. This issue impacts the availability of network services and can potentially compromise the overall network infrastructure reliability.
The technical implementation of this vulnerability falls under the category of protocol processing flaws that can be categorized as CWE-400, which specifically addresses "Uncontrolled Resource Consumption." The affected Huawei products operate with specific software versions that contain inadequate input validation for protocol handling mechanisms. When these devices receive malformed or specially constructed protocol data, they fail to properly handle the input and instead consume excessive system resources or enter a state where normal operations become impossible. The attack vectors leverage protocol inconsistencies that allow attackers to send crafted traffic patterns designed to overwhelm the device's processing capabilities or trigger resource exhaustion. This particular weakness demonstrates a failure in proper error handling and input validation that is fundamental to secure system design principles.
From an operational standpoint, this vulnerability poses significant risk to network availability and business continuity. Network administrators managing these affected Huawei devices face potential service disruption that could impact enterprise communications, customer access, and overall network infrastructure reliability. The remote nature of the attack means that adversaries do not require physical access or local network privileges to exploit the vulnerability, making it particularly dangerous in network environments where security boundaries are not properly enforced. The attack scenario can be executed from any location with network connectivity to the affected device, potentially allowing attackers to target critical network infrastructure components. Organizations relying on these security appliances for network protection may find their defensive capabilities compromised, as the devices themselves become vulnerable to service disruption attacks.
Mitigation strategies should focus on immediate firmware updates provided by Huawei to address the protocol handling deficiencies in the affected versions. Network administrators should implement network segmentation and access controls to limit exposure of these devices to untrusted networks. The implementation of intrusion detection systems and network monitoring can help identify suspicious traffic patterns that may indicate exploitation attempts. Additionally, configuring rate limiting and protocol validation rules on network devices can provide additional protection layers. Organizations should also consider implementing redundant security appliances to maintain network availability during potential exploitation events. The vulnerability highlights the importance of regular security assessments and patch management programs to maintain network infrastructure resilience against known attack vectors. This issue aligns with several ATT&CK techniques including T1499 for network disruption and T1071 for application layer protocol usage, demonstrating how protocol-based attacks can be leveraged for service disruption objectives.