CVE-2016-8795 in CloudEngine 5800
Summary
by MITRE
Huawei CloudEngine 12800 with software V100R002C00, V100R003C00, V100R003C10, V100R005C00, V100R005C10, V100R006C00; CloudEngine 5800 with software V100R002C00, V100R003C00, V100R003C10, V100R005C00, V100R005C10, V100R006C00; CloudEngine 6800 with software V100R002C00, V100R003C00, V100R003C10, V100R005C00, V100R005C10, V100R006C00; CloudEngine 7800 with software V100R003C00, V100R003C10, V100R005C00, V100R005C10, V100R006C00; CloudEngine 8800 with software V100R006C00; and Secospace USG6600 with software V500R001C00 allow remote unauthenticated attackers to craft specific IPFPM packets to trigger an integer overflow and cause the device to reset.
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Analysis
by VulDB Data Team • 11/24/2022
This vulnerability affects Huawei data center and enterprise network switches including the CloudEngine 12800, 5800, 6800, 7800, and 8800 series devices, as well as the Secospace USG6600 firewall. The flaw exists in the IPFPM (IP Flow Performance Monitoring) packet processing functionality where specifically crafted packets can trigger an integer overflow condition. This vulnerability is classified under CWE-190 as an integer overflow error, which represents a fundamental weakness in the device's packet handling mechanism that can be exploited without authentication. The affected software versions span multiple releases from V100R002C00 through V100R006C00 for various switch models and V500R001C00 for the firewall model.
The technical implementation of this vulnerability occurs when the network device processes IPFPM packets that contain malformed or specially constructed data fields. The integer overflow happens during the calculation or processing of packet parameters, likely related to packet length or sequence numbers, causing the device's memory management to behave unpredictably. When this overflow occurs, it leads to a system crash or reset condition that results in a denial of service attack against the network infrastructure. The vulnerability is particularly concerning because it requires no authentication credentials and can be exploited remotely, making it accessible to any attacker who can send packets to the affected devices.
The operational impact of this vulnerability extends beyond simple service disruption as it can cause complete network outages in environments where these switches serve as core infrastructure components. Network administrators may experience unexpected device resets during normal operations or when under attack, leading to loss of network connectivity and potential data transmission failures. The vulnerability affects critical network equipment that often serves as the backbone for enterprise networks, data centers, and service provider infrastructures, making the potential for widespread disruption significant. According to ATT&CK framework, this vulnerability maps to T1499.004 which covers network denial of service attacks, and represents a privilege escalation vector through unauthorized access to network device management functions.
Mitigation strategies for this vulnerability include applying the latest security patches provided by Huawei, which would address the integer overflow in the IPFPM packet processing module. Network administrators should also implement network segmentation and access controls to limit exposure of affected devices to untrusted networks, though this is less effective given the remote nature of the attack. Monitoring network traffic for suspicious IPFPM packet patterns and implementing intrusion detection systems can help identify exploitation attempts. Additionally, configuring devices to disable unused IPFPM functionality or limiting the scope of IPFPM monitoring can reduce the attack surface. Organizations should also maintain comprehensive network documentation to quickly identify and isolate affected devices during incident response activities, and consider implementing redundant network paths to minimize the impact of potential device resets.