CVE-2017-15324 in S12700
Summary
by MITRE
Huawei S12700 V200R006C00, V200R007C00, V200R007C01, V200R007C20, V200R008C00, V200R009C00, V200R010C00; S1700 V200R006C10, V200R009C00, V200R010C00; S2700 V200R006C00, V200R006C10, V200R007C00, V200R008C00, V200R009C00, V200R010C00, V200R011C00; S5700 V200R005C00, V200R006C00, V200R007C00, V200R008C00, V200R009C00, V200R010C00, V200R011C00; S6700 V200R005C00, V200R008C00, V200R009C00, V200R010C00; S7700 V200R006C00, V200R007C00, V200R008C00, V200R009C00, V200R010C0; S9700 V200R006C00, V200R007C00, V200R007C01, V200R008C00, V200R009C00, V200R010C00 have a DoS vulnerability due to insufficient validation of the Network Quality Analysis (NQA) packets. A remote attacker could exploit this vulnerability by sending malformed NQA packets to the target device. Successful exploitation could make the device restart.
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Analysis
by VulDB Data Team • 01/18/2023
This vulnerability affects Huawei network switches across multiple product lines including S12700, S1700, S2700, S5700, S6700, S7700, and S9700 series operating on specific software versions. The issue stems from inadequate input validation within the Network Quality Analysis protocol implementation, which is a critical network monitoring feature used to assess network performance and connectivity. The vulnerability is classified as a denial of service condition that can be triggered remotely without authentication requirements, making it particularly dangerous in network environments where such devices are accessible from untrusted networks.
The technical flaw resides in the processing of NQA packets where the device fails to properly validate packet structures and content before processing them. This insufficient validation creates an opportunity for attackers to craft malformed packets that, when received by the vulnerable switch, cause the device to enter an unstable state leading to unexpected restarts. The vulnerability demonstrates characteristics consistent with CWE-129 Input Validation and CWE-20 Improper Input Validation, where the system does not adequately check the bounds and structure of incoming network data before processing. According to ATT&CK framework, this represents a network-level attack pattern under T1499 Network Denial of Service, where adversaries seek to disrupt network services by causing device failures.
The operational impact of this vulnerability is significant as it can lead to network disruption and service degradation across enterprise and data center environments where these switches are deployed. Network administrators may experience unexpected outages, increased maintenance overhead, and potential business continuity issues when devices restart unexpectedly. The remote exploitability means that attackers do not need physical access or network credentials to trigger the vulnerability, making it accessible to a broader range of threat actors. The restart condition can result in temporary loss of network connectivity for affected segments and may require manual intervention to restore normal operations.
Mitigation strategies should focus on immediate software updates and patches provided by Huawei to address the validation gaps in NQA packet processing. Network segmentation and access control measures can help reduce exposure by limiting which networks can reach these switches with NQA traffic. Implementing network monitoring solutions that can detect anomalous packet patterns and automatically alert administrators to potential exploitation attempts provides additional defense layers. Organizations should also consider disabling NQA functionality on switches where it is not strictly required, and implementing rate limiting or packet filtering rules to prevent malformed NQA packets from reaching vulnerable devices. Regular vulnerability assessments and network configuration reviews are essential to identify and remediate similar validation weaknesses across the network infrastructure.