CVE-2017-2172 in KUNAI
Summary
by MITRE
Cross-site scripting vulnerability in Cybozu KUNAI for Android 3.0.0 to 3.0.6 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.
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Analysis
by VulDB Data Team • 10/24/2019
The vulnerability identified as CVE-2017-2172 represents a critical cross-site scripting flaw within Cybozu KUNAI for Android versions 3.0.0 through 3.0.6. This security weakness exposes users to potential malicious code execution through web script injection attacks that can be initiated remotely by threat actors. The vulnerability stems from insufficient input validation and output encoding mechanisms within the application's web interface handling components, creating an attack surface where malicious payloads can be seamlessly integrated into legitimate application flows. The unspecified vectors indicate that the flaw exists across multiple potential injection points within the application's user interface rendering processes, making the vulnerability particularly concerning as it may affect various interaction scenarios.
This cross-site scripting vulnerability falls under the CWE-79 category of Cross-Site Scripting, which specifically addresses the injection of malicious scripts into web applications. The flaw enables attackers to execute arbitrary JavaScript code within the context of the victim's browser session, potentially leading to session hijacking, credential theft, or unauthorized data manipulation. The vulnerability's remote exploitability means that attackers do not require physical access to the device or network privileges to carry out successful attacks. The affected Cybozu KUNAI application, designed for mobile device management and collaboration, becomes a prime target for such attacks given its widespread use in enterprise environments where sensitive corporate data is handled. The vulnerability impacts the application's integrity by allowing unauthorized code execution, potentially compromising the confidentiality and availability of enterprise information.
The operational impact of this vulnerability extends beyond simple script injection, as it can facilitate more sophisticated attack vectors including phishing, session fixation, and data exfiltration. Mobile device management applications like Cybozu KUNAI often handle sensitive corporate information, making them attractive targets for advanced persistent threats. The vulnerability's presence in the Android application environment creates additional risks as mobile devices typically contain personal and corporate data that can be leveraged for further attacks. Attackers can exploit this weakness to redirect users to malicious websites, steal session cookies, or inject malicious content that persists within the application's user interface. The vulnerability's exploitation can lead to complete compromise of user sessions and potentially provide attackers with access to enterprise resources that the application manages. Security professionals must consider the broader implications of such vulnerabilities in mobile enterprise applications, where the attack surface can extend beyond the immediate application boundaries.
Organizations utilizing Cybozu KUNAI for Android should immediately implement mitigations including updating to version 3.0.7 or later, which contains the necessary patches for this vulnerability. The recommended remediation strategy involves thorough input validation and output encoding across all user-facing interfaces, implementing proper content security policies, and conducting regular security assessments of mobile applications. Additionally, organizations should consider implementing network-level protections such as web application firewalls and monitoring for suspicious script injection attempts. The vulnerability demonstrates the critical importance of maintaining up-to-date mobile security solutions and implementing robust application security testing processes. Security teams should also consider the ATT&CK framework's techniques related to credential access and defense evasion, as this vulnerability could enable attackers to establish persistent access through session hijacking or other credential theft mechanisms. Regular security awareness training for end users remains essential, particularly regarding the risks of interacting with untrusted web content within enterprise mobile applications.