CVE-2017-15333 in SXXX
Summary
by MITRE
XML parser in Huawei S12700 V200R005C00,S1700 V200R009C00, V200R010C00,S3700 V100R006C03, V100R006C05,S5700 V200R001C00, V200R002C00, V200R003C00, V200R003C02, V200R005C00, V200R006C00, V200R007C00, V200R008C00, V200R009C00, V200R010C00,S6700 V200R001C00, V200R002C00, V200R003C00, V200R005C00, V200R005C02, V200R008C00, V200R009C00, V200R010C00,S7700 V200R001C00, V200R002C00, V200R003C00, V200R005C00, V200R006C00, V200R007C00, V200R008C00, V200R009C00, V200R010C00,S9700 V200R001C00, V200R002C00, V200R003C00, V200R005C00, V200R006C00, V200R007C00, V200R008C00, V200R009C00, V200R010C00,eCNS210_TD V100R004C10, V100R004C10SPC003, V100R004C10SPC100, V100R004C10SPC101, V100R004C10SPC102, V100R004C10SPC200, V100R004C10SPC221, V100R004C10SPC400 has a DOS vulnerability. An attacker may craft specific XML files to the affected products. Due to not check the specially XML file and to parse this file, successful exploit will result in DOS attacks.
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Analysis
by VulDB Data Team • 02/06/2023
The vulnerability identified as CVE-2017-15333 affects Huawei networking equipment across multiple product lines including S12700, S1700, S3700, S5700, S6700, S7700, and S9700 series switches, along with eCNS210_TD wireless access points. This issue resides within the XML parser component of these devices, representing a critical denial of service vulnerability that can be exploited by remote attackers. The affected versions span numerous firmware releases from V200R005C00 through V200R010C00 for switches and V100R004C10 through V100R010C00 for wireless access points, indicating a widespread impact across Huawei's enterprise networking portfolio.
The technical flaw stems from inadequate input validation within the XML parsing mechanism of these network devices. When processing specially crafted XML files, the parser fails to perform proper validation checks before attempting to parse the malicious content. This absence of input sanitization creates a path for attackers to construct XML payloads designed to trigger resource exhaustion or parsing errors within the device's processing engine. The vulnerability specifically targets the XML parser's handling of malformed or specially constructed XML data, where the system attempts to parse the file without sufficient validation controls to prevent malicious input from causing system instability.
The operational impact of this vulnerability is significant as it allows remote attackers to perform denial of service attacks against affected Huawei networking equipment. Successful exploitation results in complete service disruption of the targeted devices, potentially leading to network outages and service interruptions for organizations relying on these switches and access points. The vulnerability's remote exploitability means that attackers do not require physical access or network credentials to trigger the denial of service condition, making it particularly dangerous in enterprise environments where network availability is critical. Organizations may experience extended downtime while affected devices require manual intervention or firmware updates to restore normal operation.
Security mitigations for this vulnerability should focus on immediate firmware updates provided by Huawei to address the XML parsing validation issues. Network administrators should implement network segmentation to limit access to affected devices and consider deploying intrusion detection systems to monitor for suspicious XML traffic patterns. The vulnerability aligns with CWE-20, "Improper Input Validation," which is a fundamental security principle that emphasizes the importance of validating all external inputs to prevent various attack vectors. From an adversary perspective, this vulnerability maps to ATT&CK technique T1499.004, "Endpoint Denial of Service," as it enables attackers to disrupt network services through device-level denial of service attacks. Organizations should also consider implementing network access controls to restrict XML file processing capabilities and regularly review device configurations to ensure proper input validation mechanisms are in place.