RDMA Server Hammer-Attack Detection Using Request Mismatch Thresholds
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Solution Overview
Problem
RDMA networks face security vulnerabilities due to the bypassing of traditional operating system-level security checks, making them susceptible to unauthorized access through hammer attacks where attackers guess sensitive information to gain access.
Innovation Solution
Implement a threat detection system that monitors request patterns and thresholds for mismatched information, triggering alerts and responses such as blocking or disabling access when predefined thresholds are exceeded, using hardware-level mechanisms like DPUs and network accelerators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If RDMA technology is used to enhance network communication efficiency and reduce latency, then speed and productivity are improved, but security reliability deteriorates due to bypassing operating system-level security checks
Solution Approach 1:
The patent introduces a security monitoring intermediary that sits between the RDMA network layer and the operating system. This intermediary component monitors RDMA traffic and detects hammer attacks without blocking the high-speed RDMA communication path, thus maintaining speed while improving security reliability
Solution Approach 2:
The patent segments the security monitoring function from the main RDMA communication path by implementing a separate monitoring mechanism that tracks authentication attempts independently. This allows the RDMA network to operate at full speed while the segmented monitoring system provides enhanced security checks
2Reliability
If traditional operating system-level security checks are implemented, then security reliability is improved, but speed and latency deteriorate due to CPU involvement
Solution Approach 1:
The patent replaces the traditional CPU-based operating system security checks with a hardware-level or firmware-level monitoring mechanism. This substitution removes the security verification burden from the CPU path, maintaining high communication speed while providing robust security through dedicated monitoring hardware or firmware
3Reliability
If monitoring mechanisms are added to detect hammer attacks, then security reliability is improved, but device complexity increases
Solution Approach 1:
The patent implements a monitoring mechanism that serves multiple functions: detecting hammer attacks, tracking authentication patterns, identifying malicious sources, and triggering security responses. By consolidating these security functions into a single multi-functional monitoring system, the patent improves security reliability without proportionally increasing device complexity
Data Source
AI summary
Embodiments disclosed relate to performing threat detection in networks, as may include detecting and responding to hammer attacks in RDMA or other such networks. In an RDMA network, a server or a process may authenticate requests by verifying if the key presented matches one that is pre-shared with another server or process. Such a system can enhance security by incorporating a counter mechanism that tracks number of requests with unmatched information. Upon detecting that the count of such requests surpasses a predefined threshold, the system may determine that this is indicative of a potential hammer attack and may perform various actions in response. For example, an alert may be triggered and sent to a host. The host, upon receiving this alert, may temporarily disable the server or identify the source of these suspicious requests and enable the host to take targeted action, such as blocking the attacker to prevent further unauthorized attempts.