CVE-2019-19370 in MiCollab App
Summary
by MITRE
A cross-site scripting (XSS) vulnerability in the web conferencing component of the Mitel MiCollab application before 9.0.15 for Android could allow an unauthenticated attacker to conduct a reflected cross-site scripting (XSS) attack due to insufficient validation in the file upload interface. A successful exploit could allow an attacker to execute arbitrary scripts.
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Analysis
by VulDB Data Team • 03/03/2020
The CVE-2019-19370 vulnerability represents a critical cross-site scripting flaw within the web conferencing component of Mitel MiCollab applications running on Android platforms prior to version 9.0.15. This vulnerability specifically affects the file upload interface where insufficient input validation mechanisms fail to properly sanitize user-supplied data, creating an exploitable condition that enables malicious actors to inject and execute arbitrary scripts within the context of affected users' browsers. The vulnerability falls under the CWE-79 category of Cross-Site Scripting, which is classified as a fundamental web application security weakness that allows attackers to inject client-side scripts into web pages viewed by other users. The reflected nature of this XSS vulnerability means that malicious payloads are reflected back to users through web application responses, typically via URL parameters or form fields that are not properly escaped or validated before being rendered.
The operational impact of this vulnerability extends beyond simple script execution, as it creates a potential vector for more sophisticated attacks within the Mitel MiCollab environment. An unauthenticated attacker could leverage this flaw to hijack user sessions, steal sensitive information, perform unauthorized actions on behalf of users, or even redirect victims to malicious websites. The web conferencing component of MiCollab typically handles sensitive communication data including meeting information, user credentials, and potentially confidential business communications, making this vulnerability particularly dangerous for enterprise environments where such applications are deployed. The attack scenario involves an attacker crafting malicious input that gets processed by the vulnerable file upload interface and subsequently reflected back to other users who view the affected web page, thereby executing the injected scripts in their browser context. This type of vulnerability directly violates the principle of least privilege and can compromise the integrity and confidentiality of the entire communication platform.
Security professionals should note that this vulnerability aligns with several ATT&CK techniques including T1059.007 for Command and Scripting Interpreter and T1566 for Phishing, as attackers could use the XSS flaw to deliver malicious payloads or redirect users to phishing sites. The vulnerability's exploitation requires minimal privileges and can be executed without authentication, making it particularly attractive to threat actors seeking to establish persistent access within enterprise networks. Organizations using Mitel MiCollab should prioritize immediate patching to version 9.0.15 or later, as this represents the official remediation for the identified XSS vulnerability. Additional mitigations include implementing proper input validation mechanisms, employing Content Security Policy headers, and conducting regular security assessments of web applications to identify similar validation flaws. The vulnerability demonstrates the importance of comprehensive security testing, particularly for web interfaces that handle user input, and underscores the critical need for regular security updates and vulnerability management processes. Organizations should also consider implementing web application firewalls and monitoring for suspicious input patterns that could indicate attempts to exploit similar XSS vulnerabilities in their systems.