CVE-2017-17199 in DP300
Summary
by MITRE
Huawei DP300 V500R002C00; RP200 V500R002C00; V600R006C00; TE30 V100R001C10; V500R002C00; V600R006C00; TE40 V500R002C00; V600R006C00; TE50 V500R002C00; V600R006C00; TE60 V100R001C10; V500R002C00; V600R006C00 have an out-of-bounds read vulnerability due to the improper processing of malformed H323 messages. A remote attacker that controls a server could exploit this vulnerability by sending malformed H323 reply messages to a target device. Successful exploit could make the device read out of bounds and probably make a service unavailable.
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Analysis
by VulDB Data Team • 02/17/2023
The vulnerability identified as CVE-2017-17199 represents a critical out-of-bounds read flaw affecting multiple Huawei video conferencing and communication devices including DP300, RP200, TE30, TE40, TE50, and TE60 models across various firmware versions. This vulnerability stems from inadequate input validation mechanisms within the H323 protocol processing subsystem of these devices, creating a pathway for remote exploitation that could compromise device stability and availability. The flaw specifically manifests when devices receive malformed H323 reply messages from external servers, exploiting improper boundary checking during message parsing operations.
The technical implementation of this vulnerability aligns with CWE-125, which describes out-of-bounds read conditions where programs access memory locations beyond the intended buffer boundaries. In Huawei's affected devices, the H323 message processing logic fails to properly validate the length and structure of incoming reply messages, allowing attackers to craft malicious payloads that trigger buffer overflow conditions. When the device attempts to parse these malformed messages, the insufficient bounds checking causes the system to read memory beyond allocated buffers, potentially accessing sensitive data or causing system crashes. This type of vulnerability falls under the ATT&CK technique T1203, where adversaries exploit software vulnerabilities to gain unauthorized access or cause system instability.
The operational impact of this vulnerability extends beyond simple service disruption, as successful exploitation could lead to complete device unavailability and potential data exposure. Remote attackers capable of controlling a server that communicates with these Huawei devices could leverage this weakness to cause denial of service conditions, making critical communication infrastructure inaccessible to legitimate users. The vulnerability's remote exploitability means that attackers do not require physical access or network proximity to the affected devices, significantly increasing the attack surface and potential impact. Organizations utilizing these video conferencing solutions face risks of business interruption, communication failures, and potential compromise of sensitive meeting content that might be accessible through memory read operations.
Mitigation strategies should prioritize immediate firmware updates from Huawei to address the underlying buffer overflow conditions in H323 message processing. Network segmentation and firewall rules should be implemented to restrict H323 traffic to trusted sources only, reducing the attack surface for potential exploitation. Additionally, implementing network monitoring solutions that can detect malformed H323 messages and abnormal traffic patterns will help identify potential exploitation attempts. Security teams should also consider disabling H323 protocols entirely if not required for business operations, as this eliminates the attack vector while maintaining communication capabilities through alternative protocols. The vulnerability demonstrates the importance of robust input validation in network communication protocols and highlights the need for continuous security assessments of embedded systems in enterprise communication infrastructure. Organizations should also implement regular vulnerability scanning procedures to identify similar weaknesses in other networked devices and communication systems within their infrastructure.