CVE-2009-4196 in Mt882 V100t002b020 Arg-t
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in multiple scripts in Forms/ in Huawei MT882 V100R002B020 ARG-T running firmware 3.7.9.98 allow remote attackers to inject arbitrary web script or HTML via the (1) BackButton parameter to error_1; (2) wzConnFlag parameter to fresh_pppoe_1; (3) diag_pppindex_argen and (4) DiagStartFlag parameters to rpDiag_argen_1; (5) wzdmz_active and (6) wzdmzHostIP parameters to rpNATdmz_argen_1; (7) wzVIRTUALSVR_endPort, (8) wzVIRTUALSVR_endPortLocal, (9) wzVIRTUALSVR_IndexFlag, (10) wzVIRTUALSVR_localIP, (11) wzVIRTUALSVR_startPort, and (12) wzVIRTUALSVR_startPortLocal parameters to rpNATvirsvr_argen_1; (13) Connect_DialFlag, (14) Connect_DialHidden, and (15) Connect_Flag parameters to rpStatus_argen_1; (16) Telephone_select, and (17) wzFirstFlag parameters to rpwizard_1; and (18) wzConnectFlag parameter to rpwizPppoe_1.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 11/16/2024
The vulnerability identified as CVE-2009-4196 represents a critical cross-site scripting flaw affecting Huawei MT882 V100R002B020 ARG-T devices running firmware version 3.7.9.98. This issue manifests across multiple scripts within the Forms/ directory of the device's web interface, creating a broad attack surface for remote threat actors seeking to exploit client-side vulnerabilities. The affected parameters span various network configuration and status management functions, indicating a systemic weakness in input validation mechanisms throughout the device's administrative interface.
The technical flaw stems from insufficient sanitization of user-supplied input parameters across multiple web scripts that handle network configuration and diagnostic functions. Each vulnerable parameter serves as a potential injection point where malicious payloads can be executed within the context of authenticated users' browsers. The vulnerability affects parameters such as BackButton, wzConnFlag, diag_pppindex_argen, and numerous others related to NAT configuration, virtual server settings, connection management, and wizard navigation. These parameters are processed without adequate validation or encoding, allowing attackers to inject malicious JavaScript code or HTML content that executes in the victim's browser session.
The operational impact of this vulnerability is significant as it enables remote code execution within the context of authenticated web sessions, potentially allowing attackers to escalate privileges, steal session cookies, redirect users to malicious sites, or perform unauthorized configuration changes. The vulnerability affects the device's administrative interface, meaning that successful exploitation could lead to complete compromise of the network gateway device. Attackers could leverage these XSS vectors to inject persistent malicious scripts that would execute whenever administrators access the affected web pages, creating a persistent backdoor for future attacks.
Mitigation strategies should focus on implementing comprehensive input validation and output encoding across all web application interfaces. The device firmware should be updated to properly sanitize all user-supplied parameters before processing or rendering them in web responses. Network segmentation and access controls should be implemented to limit exposure of administrative interfaces to trusted networks only. Additionally, regular security audits of web applications should be conducted to identify similar vulnerabilities in input handling mechanisms. This vulnerability aligns with CWE-79 (Cross-site Scripting) and maps to ATT&CK techniques involving client-side exploitation and credential theft through web-based attacks. Organizations should also consider implementing web application firewalls and content security policies to provide additional layers of protection against such injection attacks.