CVE-2017-17134 in DP300
Summary
by MITRE
XML parser in Huawei DP300 V500R002C00; RP200 V500R002C00SPC200; V600R006C00; TE30 V100R001C10; V500R002C00; V600R006C00; TE40 V500R002C00; V600R006C00; TE50 V500R002C00; V600R006C00; TE60 V100R001C10; V500R002C00; V600R006C00 has a DoS vulnerability. Due to not check the specially XML file enough an authenticated local attacker may craft specific XML files to the affected products and parse this file which cause to null pointer accessing and result in DoS attacks.
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Analysis
by VulDB Data Team • 02/16/2023
The vulnerability identified as CVE-2017-17134 affects Huawei communication devices including DP300, RP200, TE30, TE40, TE50, and TE60 series across multiple software versions. This issue resides within the XML parser component of these network appliances, representing a critical security weakness that can be exploited through local authenticated access. The vulnerability stems from insufficient validation of XML input files, specifically failing to properly handle malformed or specially crafted XML structures that could lead to system instability.
The technical flaw manifests when the affected devices process XML files without adequate sanitization or validation checks. An authenticated local attacker can construct specific XML payloads that, when parsed by the vulnerable software, trigger a null pointer dereference condition. This memory access violation occurs because the XML parser does not properly validate the structure or content of incoming XML documents before attempting to process them. The parser attempts to access memory locations that have not been properly initialized or allocated, resulting in a system crash or complete service disruption.
From an operational impact perspective, this vulnerability creates a significant denial of service risk for organizations relying on Huawei communication infrastructure. The attack requires only local authentication access, which means that an attacker with legitimate user credentials could potentially disrupt critical communication services. The DoS condition can result in complete service outages affecting video conferencing, telephony, and other communication capabilities that depend on these devices. Network administrators may experience extended downtime while system recovery procedures are implemented, potentially affecting business continuity and collaborative operations.
The vulnerability aligns with CWE-476, which describes null pointer dereference conditions in software systems. This weakness represents a common class of memory safety issues that can be exploited to cause system instability or complete service disruption. From an attack framework perspective, this vulnerability maps to the MITRE ATT&CK technique T1499.004, which covers network denial of service attacks through system resource exhaustion or process termination. The authenticated nature of the attack means that internal threat actors or compromised accounts could leverage this weakness without requiring external network access.
Mitigation strategies should focus on implementing proper XML input validation and sanitization mechanisms within the affected devices. Organizations should apply the latest firmware updates provided by Huawei to address this vulnerability. Network segmentation and access controls should be strengthened to limit local authentication access to only authorized personnel. Additionally, implementing monitoring solutions to detect unusual XML processing activities or system crashes can help identify potential exploitation attempts. Regular security assessments of communication infrastructure should include validation of XML parser security configurations and input validation routines. System administrators should also consider implementing automated backup and recovery procedures to minimize downtime in case of successful exploitation attempts.