CVE-2022-32770 in AVideo
Summary
by MITRE • 08/22/2022
A cross-site scripting (xss) vulnerability exists in the footer alerts functionality of WWBN AVideo 11.6 and dev master commit 3f7c0364. A specially-crafted HTTP request can lead to arbitrary Javascript execution. An attacker can get an authenticated user to send a crafted HTTP request to trigger this vulnerability.This vulnerability arrises from the "toast" parameter which is inserted into the document with insufficient sanitization.
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Analysis
by VulDB Data Team • 09/24/2022
The CVE-2022-32770 vulnerability represents a critical cross-site scripting flaw within the WWBN AVideo platform version 11.6 and its development master branch at commit 3f7c0364. This vulnerability specifically targets the footer alerts functionality, which serves as a user interface component designed to display system notifications and alerts to authenticated users. The flaw arises from improper input validation and sanitization mechanisms that fail to adequately process user-supplied data before rendering it within the web application's document object model. The vulnerability's exploitation requires an attacker to craft a malicious HTTP request that can be delivered to an authenticated user, leveraging the trust relationship between the user and the application to execute malicious code within the user's browser context.
The technical implementation of this vulnerability stems from the insecure handling of the "toast" parameter within the footer alerts system. When a user interacts with the application's alert functionality, the system accepts user input through the toast parameter without sufficient sanitization or encoding. This parameter is subsequently inserted directly into the document structure without proper HTML escaping or context-appropriate sanitization measures. The vulnerability falls under CWE-79 - Improper Neutralization of Input During Web Page Generation, which specifically addresses the failure to properly escape or sanitize user-controllable data before including it in web content. The attack vector requires a server-side component that processes the toast parameter and renders it in a way that allows JavaScript execution, typically through DOM-based manipulation or direct insertion into script contexts.
The operational impact of this vulnerability extends beyond simple data theft or session hijacking, as it enables full client-side code execution within the context of authenticated user sessions. An attacker who successfully exploits this vulnerability can potentially perform actions such as stealing user session cookies, modifying user interface elements, redirecting users to malicious sites, or executing arbitrary JavaScript code that can harvest sensitive information from the user's browsing session. The vulnerability's severity is amplified by the fact that it requires minimal user interaction beyond visiting a page containing the malicious payload, making it particularly dangerous in environments where users frequently interact with the application's alert systems. This type of vulnerability aligns with ATT&CK technique T1059.007 - Command and Scripting Interpreter: JavaScript, which describes how adversaries can leverage JavaScript execution capabilities to perform malicious activities within compromised user sessions.
Mitigation strategies for CVE-2022-32770 should focus on implementing proper input sanitization and output encoding mechanisms throughout the application's data flow. The most effective immediate fix involves implementing strict sanitization of the toast parameter before any insertion into the document, utilizing context-appropriate encoding such as HTML entity encoding or JavaScript string escaping. Organizations should also consider implementing Content Security Policy (CSP) headers to limit the execution of inline scripts and reduce the impact of potential XSS attacks. Additionally, implementing proper input validation that rejects or sanitizes potentially malicious payloads, combined with regular security testing including automated XSS scanning, will help prevent similar vulnerabilities from being introduced in future code releases. The fix should align with security best practices outlined in OWASP Top Ten and the CWE guidelines for preventing cross-site scripting vulnerabilities in web applications.