CVE-2018-10107 in DIR-815
Summary
by MITRE
D-Link DIR-815 REV. B (with firmware through DIR-815_REVB_FIRMWARE_PATCH_2.07.B01) devices have XSS in the RESULT parameter to /htdocs/webinc/js/info.php.
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Analysis
by VulDB Data Team • 01/25/2020
The vulnerability CVE-2018-10107 represents a cross-site scripting flaw discovered in D-Link DIR-815 REV. B wireless routers running firmware versions up to DIR-815_REVB_FIRMWARE_PATCH_2.07.B01. This security weakness resides within the web interface of the device, specifically in the handling of the RESULT parameter within the /htdocs/webinc/js/info.php script. The vulnerability manifests when user-supplied input is not properly sanitized before being reflected back to the browser, creating an avenue for malicious actors to inject and execute arbitrary script code within the context of the victim's browser session.
The technical implementation of this XSS vulnerability stems from inadequate input validation and output encoding practices within the router's web application framework. When a user submits data containing malicious script payloads through the RESULT parameter, the application fails to properly escape or filter the input before rendering it in the web interface. This allows attackers to craft specially crafted requests that, when executed by a victim's browser, can execute malicious JavaScript code in the context of the authenticated user's session. The vulnerability falls under CWE-79 which specifically addresses Cross-Site Scripting flaws in web applications, and aligns with ATT&CK technique T1212 which targets application security weaknesses to gain access to systems.
The operational impact of this vulnerability extends beyond simple script execution as it can enable attackers to perform session hijacking, steal authentication tokens, redirect users to malicious sites, or even modify router configurations if the victim is an administrator. An attacker could exploit this vulnerability by enticing a user to click on a malicious link that contains the XSS payload, potentially leading to complete compromise of the router's administrative interface. The vulnerability is particularly concerning because it affects the web-based management interface of the router, which is typically accessible to users within the local network, making it relatively easy to exploit within a targeted environment. This weakness undermines the security posture of the device by allowing unauthorized code execution within the context of the web application, potentially enabling attackers to establish persistent access to the network.
Mitigation strategies for this vulnerability should include immediate firmware updates from D-Link to address the XSS flaw, proper input validation and output encoding implementations within the web application, and network segmentation to limit access to administrative interfaces. Organizations should also implement web application firewalls to detect and prevent malicious payloads from reaching the vulnerable application, and conduct regular security assessments of network devices to identify similar vulnerabilities. The vulnerability highlights the importance of secure coding practices in embedded web applications and demonstrates the necessity of proper input sanitization and output encoding to prevent XSS attacks in network infrastructure devices.