CVE-2017-15348 in NGFW Module
Summary
by MITRE
Huawei IPS Module V500R001C00, NGFW Module V500R001C00, NIP6300 V500R001C00, NIP6600 V500R001C00, Secospace USG6300 V500R001C00, Secospace USG6500 V500R001C00, Secospace USG6600 V500R001C00, USG9500 V500R001C00 have an insufficient input validation vulnerability. An unauthenticated, remote attacker could send specific MPLS Echo Request messages to the target products. Due to insufficient input validation of some parameters in the messages, successful exploit may cause the device to reset.
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Analysis
by VulDB Data Team • 02/08/2023
The vulnerability identified as CVE-2017-15348 affects multiple Huawei network security appliances including IPS modules, NGFW modules, NIP series devices, and USG series firewalls. This weakness stems from inadequate input validation mechanisms within the MPLS (Multiprotocol Label Switching) protocol implementation, specifically when processing Echo Request messages. The affected products operate under versions V500R001C00, making them susceptible to remote exploitation without authentication requirements. The vulnerability represents a significant security risk as it allows attackers to remotely trigger device resets through carefully crafted network packets.
The technical flaw manifests in the insufficient validation of parameters within MPLS Echo Request messages processed by the affected Huawei security appliances. When these devices receive malformed or specially constructed MPLS Echo Request packets, they fail to properly validate the incoming data before processing it. This validation gap enables attackers to manipulate specific parameters within the MPLS protocol messages, leading to unexpected behavior in the device's processing engine. The vulnerability is particularly concerning because it operates at the network protocol level, allowing exploitation through standard network traffic without requiring any privileged access or authentication credentials.
The operational impact of this vulnerability extends beyond simple device disruption to potentially compromise network availability and integrity. Successful exploitation results in device resets, which can lead to service interruptions and denial of network services. In security-critical environments, this could provide attackers with a means to disrupt network operations or potentially mask other malicious activities through the resulting service outages. The remote nature of the attack means that adversaries can target these devices from anywhere on the network, making the vulnerability particularly dangerous in environments where network security appliances serve as critical infrastructure components.
Organizations should implement immediate mitigations including network segmentation to isolate affected devices, deployment of network access control lists to filter MPLS traffic, and monitoring for anomalous MPLS Echo Request patterns. The vulnerability aligns with CWE-20, which describes inadequate input validation, and represents a potential pathway for attackers to execute techniques categorized under the ATT&CK framework's T1499, which covers network disruption attacks. Regular firmware updates and patches from Huawei should be prioritized, while network administrators should also consider implementing intrusion detection systems to monitor for suspicious MPLS traffic patterns that could indicate exploitation attempts.