CVE-2017-17759 in iChannel
Summary
by MITRE
Conarc iChannel allows remote attackers to obtain sensitive information, modify the configuration, or cause a denial of service (by deleting the configuration) via a wc.dll?wwMaint~EditConfig request (which reaches an older version of a West Wind Web Connection HTTP service).
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Analysis
by VulDB Data Team • 07/06/2025
CVE-2017-17759 represents a critical security vulnerability within the Conarc iChannel system that leverages a specific endpoint in the West Wind Web Connection HTTP service to execute unauthorized operations. This vulnerability stems from improper input validation and access control mechanisms within the wc.dll component, which exposes a maintenance interface that should typically be restricted to authorized administrative users. The affected wc.dll?wwMaint~EditConfig request handler provides direct access to configuration management functions without adequate authentication checks, allowing remote attackers to exploit this weakness through carefully crafted HTTP requests.
The technical flaw manifests as a lack of proper authorization controls and input sanitization within the web service layer. When the wc.dll component processes the wwMaint~EditConfig request, it fails to validate whether the requesting user possesses legitimate administrative privileges or to properly sanitize the parameters passed to the configuration editing functions. This creates a path for attackers to manipulate the configuration files directly, potentially leading to complete system compromise. The vulnerability specifically targets older versions of the West Wind Web Connection HTTP service, indicating that the issue has been known and potentially patched in newer releases, but legacy deployments remain at risk.
The operational impact of this vulnerability extends beyond simple information disclosure to encompass full administrative control over affected systems. Attackers can not only read sensitive configuration data but also modify system settings, delete critical configuration files, or cause denial of service conditions that could render the entire iChannel system inoperable. This represents a severe privilege escalation vulnerability that aligns with CWE-285 (Improper Authorization) and CWE-20 (Improper Input Validation) categories, as the system fails to properly enforce access controls and validate user inputs before processing them. The attack vector through HTTP requests makes this vulnerability particularly dangerous as it can be exploited remotely without requiring physical access to the system.
This vulnerability demonstrates weaknesses in the software development lifecycle where security controls were not properly implemented in the web service components. The ATT&CK framework categorizes this as a privilege escalation technique through exploitation of weak access controls, while also aligning with the technique of "Web Service Configuration" where attackers manipulate service configurations to gain unauthorized access. Organizations using Conarc iChannel systems should immediately assess their deployment versions and ensure all instances are updated to patched versions of the West Wind Web Connection service. The mitigation strategy involves implementing proper authentication controls, disabling unnecessary administrative endpoints, and conducting regular security assessments of web service interfaces to identify and remediate similar vulnerabilities. Additionally, network segmentation and firewall rules should be implemented to restrict access to administrative interfaces to trusted networks only, reducing the attack surface and limiting potential exploitation scenarios.