CVE-2017-17150 in DP300
Summary
by MITRE
Timergrp module in Huawei DP300 V500R002C00; RP200 V500R002C00; V600R006C00; TE30 V100R001C10; V500R002C00; V600R006C00; TE40 V500R002C00; V600R006C00; TE50 V500R002C00; V600R006C00; TE60 V100R001C10; V500R002C00; V600R006C00 have an DoS vulnerability due to insufficient validation of the parameter. An authenticated local attacker may call a special API with special parameter, which cause an infinite loop. Successful exploit of this vulnerability can allow an attacker to launch DOS attack.
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Analysis
by VulDB Data Team • 02/17/2023
The vulnerability identified as CVE-2017-17150 affects Huawei DP300, RP200, TE30, TE40, TE50, and TE60 devices running specific firmware versions including V500R002C00, V600R006C00, and V100R001C10. This weakness resides within the timergrp module, which is responsible for managing timer operations and group synchronization within the device's operating system. The vulnerability manifests as a denial of service condition that can be triggered through improper parameter validation in a specialized application programming interface. The affected devices operate in enterprise communication environments where reliability and continuous operation are critical for business continuity.
The technical flaw stems from inadequate input validation within the timergrp module's parameter handling mechanism. When an authenticated local attacker invokes a specific API with maliciously crafted parameters, the system fails to properly validate the input before processing it. This validation failure creates a condition where the system enters an infinite loop during timer group processing operations. The vulnerability is classified as a classic buffer overflow or parameter validation flaw, which aligns with CWE-248, representing an "Uncaught Exception" in software systems. The infinite loop consumes system resources and prevents normal operation of the device's timer functions, ultimately leading to a complete denial of service state.
The operational impact of this vulnerability extends beyond simple service disruption as it can severely compromise the availability of communication services in enterprise environments. Attackers with local authenticated access can exploit this weakness to render devices inoperable, potentially affecting video conferencing capabilities, meeting scheduling functions, and overall communication infrastructure. The vulnerability affects multiple Huawei telepresence and video conferencing devices, making it particularly concerning for organizations that rely heavily on these systems for business operations. This weakness directly maps to ATT&CK technique T1499.004, which covers "Endpoint Denial of Service" through resource exhaustion, and represents a significant threat to operational continuity in mission-critical communication systems.
Mitigation strategies for this vulnerability require immediate firmware updates from Huawei, as the company has likely released patches addressing the parameter validation issues in the timergrp module. Organizations should implement network segmentation to limit local access to these devices and enforce strict access controls for authentication mechanisms. System administrators should monitor for unusual resource consumption patterns that might indicate exploitation attempts. Additionally, implementing intrusion detection systems capable of identifying abnormal API call patterns and parameter usage can help detect potential exploitation attempts. The vulnerability highlights the importance of proper input validation and exception handling in embedded systems, particularly those handling real-time operations and communication protocols. Organizations should also consider conducting regular security assessments of their embedded device ecosystems to identify similar validation weaknesses that could lead to similar denial of service conditions.