CVE-2019-17205 in TeamPass
Summary
by MITRE
TeamPass 2.1.27.36 allows Stored XSS by placing a payload in the username field during a login attempt. When an administrator looks at the log of failed logins, the XSS payload will be executed.
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Analysis
by VulDB Data Team • 01/03/2024
TeamPass version 2.1.27.36 contains a critical stored cross-site scripting vulnerability that arises from inadequate input validation and output sanitization within the authentication logging mechanism. This vulnerability specifically affects the username field during login attempts where malicious payloads can be injected and subsequently executed when administrators review failed login logs. The flaw exists because the application fails to properly sanitize user-supplied input before storing it in the database and rendering it in the administrative interface without appropriate context-aware escaping or encoding.
The technical implementation of this vulnerability stems from the application's failure to adhere to secure coding practices for input validation and output encoding. When a user attempts to log in with a malicious payload in the username field, the system stores this input directly into the database without proper sanitization. Subsequently, when administrators access the failed login logs, the stored payload is rendered in the web interface without appropriate HTML entity encoding or context-specific output escaping. This creates a classic stored XSS scenario where the malicious code executes in the context of the administrator's browser session, potentially allowing attackers to steal session cookies, perform actions on behalf of administrators, or redirect them to malicious sites.
The operational impact of this vulnerability is significant as it provides attackers with a persistent means of executing code within the administrative context of the TeamPass application. Attackers can craft payloads that exploit the stored XSS to gain elevated privileges, access sensitive configuration data, or manipulate the application's functionality. The vulnerability is particularly dangerous because it requires minimal user interaction beyond the initial login attempt, and the payloads remain active in the logs until manually cleared. This creates a persistent threat vector that can be leveraged by attackers over extended periods, especially in environments where administrators regularly review failed login attempts as part of security monitoring activities.
The vulnerability aligns with CWE-79 which specifically addresses cross-site scripting flaws and maps to several ATT&CK techniques including T1059.007 for command and script injection and T1566.002 for phishing with malicious attachments or links. Organizations using TeamPass should implement immediate mitigations including input sanitization of all user-supplied data, proper output encoding for all rendered content, and regular security reviews of authentication logging mechanisms. Additionally, implementing content security policies and monitoring for suspicious login attempts can help detect exploitation attempts. The most effective long-term solution involves upgrading to a patched version of TeamPass that implements proper input validation and output sanitization mechanisms, ensuring that all user-supplied data is properly escaped before being stored or rendered in web interfaces.