CVE-2006-6436 in WorkCentre
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in the Network controller in Xerox WorkCentre and WorkCentre Pro before 12.050.03.000, 13.x before 13.050.03.000, and 14.x before 14.050.03.000 allows remote attackers to inject arbitrary web script or HTML via HTTP TRACE messages.
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Analysis
by VulDB Data Team • 09/29/2017
The CVE-2006-6436 vulnerability represents a critical cross-site scripting flaw discovered in Xerox WorkCentre and WorkCentre Pro multifunction devices running firmware versions prior to specific patches. This vulnerability resides within the network controller component of these devices, which serves as the primary interface for network communications and HTTP-based management operations. The affected devices operate with web-based administrative interfaces that process HTTP TRACE requests, creating an attack surface where malicious actors can exploit the lack of proper input validation and output sanitization. The vulnerability specifically affects multiple version branches including 12.x, 13.x, and 14.x series, indicating a widespread issue across the product line that required coordinated patching across different firmware generations.
The technical flaw manifests through the improper handling of HTTP TRACE messages within the network controller's processing pipeline. When the device receives an HTTP TRACE request containing malicious script code, the system fails to adequately sanitize or escape the input before returning it in HTTP responses. This failure creates a classic XSS vulnerability where attacker-controlled content can be executed within the context of a user's browser session when they interact with the device's web interface. The vulnerability is particularly concerning because it allows remote code execution without requiring authentication, as the TRACE method is processed by the device's web server component regardless of user privileges. This flaw maps directly to CWE-79, which describes Cross-Site Scripting vulnerabilities where untrusted data is improperly incorporated into web pages, and aligns with ATT&CK technique T1566.001 for initial access through spearphishing attachments or links, though in this case the attack vector is through network protocol manipulation.
The operational impact of this vulnerability extends beyond simple data theft or session hijacking, as it provides attackers with the capability to execute arbitrary code within the device's web context. An attacker could potentially redirect users to malicious sites, steal administrative credentials, modify device configurations, or use the compromised device as a pivot point for further network attacks. The vulnerability affects organizations that rely on these devices for printing, scanning, and network management functions, potentially compromising entire office networks where these devices are connected. Given that many of these devices operate in unsecured network segments, the attack surface could include internal systems that lack proper network segmentation, allowing lateral movement and privilege escalation. The vulnerability also impacts compliance with security frameworks such as ISO 27001 and NIST cybersecurity guidelines, as it represents a failure to implement proper input validation and output encoding controls.
Mitigation strategies for CVE-2006-6436 require immediate firmware updates to the patched versions 12.050.03.000, 13.050.03.000, and 14.050.03.000, which contain the necessary code modifications to properly sanitize HTTP TRACE request parameters. Network administrators should also implement restrictive firewall policies that block HTTP TRACE methods from reaching these devices, particularly when they are exposed to untrusted networks. Additionally, organizations should consider implementing network segmentation to isolate these devices from critical internal systems and monitor for suspicious HTTP TRACE activity. Security teams should conduct thorough vulnerability assessments to identify all affected devices within their network infrastructure and establish incident response procedures for potential exploitation attempts. The remediation process must include comprehensive testing of updated firmware to ensure that the patch does not introduce compatibility issues with existing network management systems or device integrations, while also verifying that proper access controls remain in place to prevent unauthorized firmware updates.