CVE-2017-17200 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
This vulnerability resides in Huawei communication devices including DP300, RP200, TE30, TE40, TE50, and TE60 models across multiple software versions. The flaw manifests as an out-of-bounds read condition within the H323 protocol processing subsystem, representing a classic buffer over-read vulnerability that falls under CWE-125. The vulnerability occurs when devices receive malformed H323 reply messages from external servers, which are then improperly parsed without adequate bounds checking mechanisms. This type of vulnerability allows attackers to manipulate memory access patterns and potentially extract sensitive information from device memory or cause system instability.
The technical exploitation of this vulnerability requires a remote attacker to establish communication with a target device and craft specifically malformed H323 messages that trigger the out-of-bounds memory access. When the device processes these malformed messages, the improper input validation causes the system to read memory locations beyond the allocated buffer boundaries. This behavior aligns with ATT&CK technique T1203, where adversaries leverage software vulnerabilities to execute malicious code or cause system disruptions. The impact of successful exploitation includes potential service disruption and complete denial of service conditions, as the device may crash or become unresponsive during the memory access violation.
From a security perspective, this vulnerability represents a significant risk to enterprise communication infrastructure since H323 is widely used in VoIP and video conferencing systems. The remote attack vector means that adversaries can exploit this weakness from outside the network perimeter without requiring physical access or elevated privileges. The vulnerability affects multiple device models and software versions, indicating a systemic issue within Huawei's H323 protocol implementation that requires comprehensive patching across affected product lines. Organizations should prioritize immediate remediation through official firmware updates provided by Huawei, while implementing network segmentation and monitoring to detect potential exploitation attempts.
The broader implications extend to compliance requirements for telecommunications infrastructure, particularly in environments governed by standards such as NIST SP 800-53 and ISO 27001. This vulnerability demonstrates the critical importance of input validation and memory safety in embedded systems, where the consequences of buffer overflows can extend beyond simple information disclosure to include complete system compromise. Network administrators should consider implementing intrusion detection systems capable of identifying malformed H323 traffic patterns and establish monitoring protocols to detect unusual service availability issues that may indicate exploitation attempts. The vulnerability also highlights the need for regular security assessments of communication protocols and the importance of maintaining up-to-date firmware across all networked devices to prevent exploitation of known vulnerabilities.