CVE-2018-6355 in 300M
Summary
by MITRE
/goform/setLang on iBall 300M devices with "iB-WRB302N_1.0.1-Sep 8 2017" firmware has Unauthenticated Stored Cross Site Scripting via the lang parameter.
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Analysis
by VulDB Data Team • 12/31/2019
The vulnerability identified as CVE-2018-6355 affects iBall 300M wireless routers running firmware version iB-WRB302N_1.0.1-Sep 8 2017 and potentially other devices in the iBall product line. This issue manifests as an unauthenticated stored cross site scripting vulnerability within the web management interface of these devices. The vulnerability specifically resides in the /goform/setLang endpoint which processes the lang parameter, allowing remote attackers to inject malicious scripts that persist in the device's configuration or interface. This represents a critical security flaw that undermines the integrity of the device's web-based administrative interface and exposes users to potential exploitation. The vulnerability falls under CWE-79 which specifically addresses cross site scripting flaws in web applications and aligns with ATT&CK technique T1190 for exploitation through web applications.
The technical implementation of this vulnerability involves the improper validation and sanitization of user-supplied input through the lang parameter in the setLang form handler. When an attacker submits malicious JavaScript code through this parameter, the device fails to properly escape or validate the input before storing it in a location where it will be executed in the context of other users accessing the administration interface. This stored payload can be triggered when legitimate users view the device configuration or management pages, causing the malicious script to execute in their browsers. The lack of authentication requirements means that any remote user can exploit this vulnerability without requiring valid credentials, making it particularly dangerous for devices deployed in environments where physical access is limited or where default credentials are not changed. The attack vector operates entirely through HTTP requests to the device's web interface, making it easily exploitable from external networks.
The operational impact of this vulnerability extends beyond simple script execution and represents a significant threat to device security and network integrity. Successful exploitation allows attackers to perform actions such as stealing session cookies, redirecting users to malicious sites, modifying device configuration settings, or even executing arbitrary commands on the device if additional vulnerabilities exist. The stored nature of the XSS payload means that the attack persists even after the initial exploitation attempt, potentially affecting multiple users over time. This vulnerability can lead to complete compromise of the device's administrative interface, enabling attackers to gain unauthorized access to network configuration settings, modify firewall rules, change DNS settings, or even install malware on the device. The implications are particularly severe in enterprise or home network environments where these devices serve as primary gateways, as they could provide attackers with a persistent foothold for further network reconnaissance and lateral movement.
Mitigation strategies for CVE-2018-6355 should prioritize immediate firmware updates from iBall or third-party security vendors to address the specific XSS vulnerability in the setLang endpoint. Organizations should implement network segmentation to limit access to these devices from untrusted networks and ensure that administrative interfaces are not directly exposed to the internet. Network administrators should also enforce strict access controls and regularly audit device configurations to identify any unauthorized modifications that might result from successful exploitation. Additional protective measures include deploying web application firewalls to monitor and filter malicious requests targeting the vulnerable endpoint, implementing network monitoring tools to detect suspicious traffic patterns, and conducting regular security assessments of networked devices to identify similar vulnerabilities. The vulnerability highlights the importance of proper input validation and output encoding practices in web applications, as recommended by OWASP and other security standards, and underscores the need for comprehensive security testing during the development lifecycle of network devices. Organizations should also consider implementing device hardening practices such as disabling unnecessary services, changing default credentials, and regularly updating firmware to address known vulnerabilities in network infrastructure equipment.