CVE-2017-16819 in RTC-1000
Summary
by MITRE
A stored cross-site scripting vulnerability in the Icon Time Systems RTC-1000 v2.5.7458 and earlier time clock allows remote attackers to inject arbitrary JavaScript in the nameFirst (aka First Name) field for the employee details page (/employee.html) that is then reflected in multiple pages where that field data is utilized, resulting in session hijacking and possible elevation of privileges.
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Analysis
by VulDB Data Team • 09/14/2024
The CVE-2017-16819 vulnerability represents a critical stored cross-site scripting flaw in the Icon Time Systems RTC-1000 time clock device running firmware versions 2.5.7458 and earlier. This vulnerability exists within the employee management interface where user input is not properly sanitized or validated before being stored and subsequently reflected in web pages. The specific attack vector targets the nameFirst field on the employee details page accessible via the /employee.html endpoint, making it a prime target for persistent malicious code injection attacks.
The technical exploitation of this vulnerability occurs through the manipulation of the First Name field, where attackers can inject malicious JavaScript code that gets stored in the device's database. When this data is later retrieved and displayed on multiple pages within the application, the injected script executes in the context of authenticated users' browsers, creating a persistent XSS attack vector. The vulnerability's persistence stems from the fact that the malicious code is stored server-side rather than being reflected from a single request, making it particularly dangerous as it can affect multiple users over time.
From an operational perspective, this vulnerability poses significant risks to organizational security infrastructure as it enables attackers to perform session hijacking attacks by stealing session cookies or other authentication tokens. The potential for privilege escalation exists when attackers can leverage the stored XSS to manipulate user permissions or access restricted administrative functions within the time clock system. Given that time clock systems often contain sensitive employee data and may integrate with payroll or access control systems, the impact extends beyond simple browser-based attacks to potentially compromise broader organizational security.
The vulnerability aligns with CWE-79 which specifically addresses cross-site scripting flaws in web applications, and maps to ATT&CK technique T1059.007 for script execution through web applications. Organizations should implement immediate mitigations including firmware updates to the latest available version of the RTC-1000 device, input validation and sanitization of all user-supplied data, and the implementation of Content Security Policies to prevent execution of unauthorized scripts. Network segmentation and monitoring of the time clock system can help detect potential exploitation attempts, while regular security assessments should verify that all input fields properly sanitize user data before storage to prevent similar vulnerabilities from reoccurring in the system.