CVE-2017-17314 in DP300
Summary
by MITRE
Huawei DP300 V500R002C00, RP200 V600R006C00, TE30 V100R001C10, V500R002C00, V600R006C00, TE40 V500R002C00, V600R006C00, TE50 V500R002C00, V600R006C00, TE60 V100R001C10, V500R002C00, V600R006C00 have an invalid memory access vulnerability. An unauthenticated attacker has to find a way to send malformed SCCP messages to the affected products. Due to insufficient input validation of some values in the messages, successful exploit may cause buffer error and some service abnormal.
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Analysis
by VulDB Data Team • 03/08/2023
The vulnerability identified as CVE-2017-17314 affects multiple Huawei communication devices including DP300, RP200, TE30, TE40, TE50, and TE60 series across various firmware versions. This represents a critical memory access flaw that stems from inadequate input validation mechanisms within the signaling control part of the communication stack. The affected systems process SCCP (Signaling Connection Control Part) messages which are fundamental components of the SS7 (Signaling System No. 7) protocol suite used extensively in telecommunications networks for routing calls and managing network signaling. The vulnerability manifests when these devices receive malformed SCCP messages that bypass normal validation procedures, creating opportunities for memory corruption attacks.
The technical implementation of this vulnerability resides in the insufficient validation of parameters within SCCP message structures, specifically concerning buffer handling and memory allocation routines. When malformed messages are processed, the system fails to properly validate the length and content of incoming data fields, leading to potential buffer overflows or underflows that result in invalid memory access patterns. This flaw operates at the protocol processing layer where network signaling messages are parsed and interpreted, making it particularly dangerous as it can be exploited remotely without authentication requirements. The vulnerability aligns with CWE-125, which describes out-of-bounds read conditions, and CWE-787, covering out-of-bounds write vulnerabilities that can occur when insufficient validation prevents proper buffer boundary checking.
From an operational perspective, the impact of this vulnerability extends beyond simple service disruption to potentially enable more sophisticated attack vectors within the targeted network infrastructure. An unauthenticated attacker who successfully crafts and delivers malformed SCCP messages can trigger buffer errors that may cause service abnormalities including system crashes, unexpected restarts, or degraded performance of the affected communication devices. The attack surface is particularly concerning given that SCCP messages are routinely transmitted across telecommunications networks and the vulnerability can be exploited through network-based attacks without requiring physical access or prior authentication credentials. This aligns with ATT&CK technique T1071.004 for application layer protocol manipulation and T1046 for network service scanning that could precede exploitation.
The mitigation strategies for this vulnerability should focus on implementing robust input validation mechanisms and network segmentation controls to limit exposure. Organizations should deploy firmware updates from Huawei that address the specific memory access validation issues in the SCCP processing modules. Network monitoring solutions should be enhanced to detect and alert on anomalous SCCP message patterns that could indicate attempted exploitation. Additionally, implementing network access controls and filtering rules that restrict SCCP message processing to trusted sources can provide additional defense-in-depth measures. The vulnerability demonstrates the importance of secure coding practices in telecommunications infrastructure and the necessity of comprehensive input validation across all protocol layers to prevent memory corruption attacks that could compromise network availability and integrity.