CVE-2022-50892: VIAVIWEB Wallpaper Admin SQLi Bypass Flaw

CVE-2022-50892 Overview

VIAVIWEB Wallpaper Admin 1.0 contains a SQL injection vulnerability (CWE-89) that allows attackers to bypass authentication by manipulating login credentials. This vulnerability exists in the login page functionality where user-supplied input is not properly sanitized before being included in SQL queries. Attackers can exploit this flaw by injecting malicious SQL payloads such as 'admin' or 1=1-- - to gain unauthorized access to the administrative interface without valid credentials.

Critical Impact

Unauthenticated attackers can bypass authentication controls and gain full administrative access to the Wallpaper Admin application, potentially leading to complete compromise of the web application and underlying data.

Affected Products

• VIAVIWEB Wallpaper Admin version 1.0

Discovery Timeline

• 2026-01-13 - CVE CVE-2022-50892 published to NVD
• 2026-01-13 - Last updated in NVD database

Technical Details for CVE-2022-50892

Vulnerability Analysis

This SQL injection vulnerability affects the authentication mechanism in VIAVIWEB Wallpaper Admin 1.0. The application fails to properly validate and sanitize user input on the login page before incorporating it into backend SQL queries. When a user submits login credentials, the application constructs a SQL query using the raw username and password values without employing parameterized queries or adequate input filtering.

The vulnerability can be exploited remotely over the network without requiring any prior authentication or user interaction. An attacker who successfully exploits this vulnerability can bypass the authentication mechanism entirely, gaining administrative access to the application. This could result in unauthorized access to sensitive data, modification of application content, and potential lateral movement within the hosting environment.

Root Cause

The root cause of this vulnerability is improper input validation and the use of dynamic SQL query construction. The login form directly concatenates user-supplied input into SQL statements without sanitization or parameterization. This allows attackers to inject arbitrary SQL syntax that alters the intended query logic, effectively bypassing the authentication check.

Attack Vector

The attack vector is network-based, requiring no authentication or user interaction. An attacker can craft a malicious HTTP request to the login endpoint containing SQL injection payloads in the username or password fields. The classic payload 'admin' or 1=1-- - demonstrates the exploitation technique: the injected 1=1 condition always evaluates to true, causing the query to return a valid result regardless of the actual credentials provided. The -- - comment sequence terminates the remainder of the original query, preventing syntax errors.

The vulnerability has been documented in public exploit databases, which increases the likelihood of exploitation attempts. Detailed technical information is available through the Exploit-DB #51033 entry and the VulnCheck SQL Injection Advisory.

Detection Methods for CVE-2022-50892

Indicators of Compromise

• Authentication success events for the admin account without corresponding valid credential attempts
• Unusual SQL syntax patterns appearing in web server access logs, particularly in POST request bodies
• Multiple failed login attempts followed by sudden successful authentication from the same source
• Web Application Firewall (WAF) alerts for SQL injection patterns targeting the login endpoint

Detection Strategies

• Deploy Web Application Firewall rules to detect and block common SQL injection patterns such as OR 1=1, '--, and UNION SELECT statements
• Implement logging and alerting for authentication endpoints to identify anomalous login patterns
• Monitor database query logs for syntactically unusual queries originating from the web application
• Utilize intrusion detection systems (IDS) with signatures for SQL injection attacks targeting authentication forms

Monitoring Recommendations

• Enable detailed access logging on the web server hosting VIAVIWEB Wallpaper Admin
• Configure SIEM rules to correlate authentication events with SQL injection attack indicators
• Regularly audit administrative access logs for unauthorized logins or privilege escalation
• Monitor network traffic for suspicious patterns targeting the application's login page

How to Mitigate CVE-2022-50892

Immediate Actions Required

• Restrict network access to the VIAVIWEB Wallpaper Admin application using firewall rules or access control lists
• Place the application behind a Web Application Firewall configured to block SQL injection attempts
• Consider temporarily disabling the application if it is not business-critical until a patch is available
• Audit recent administrative access logs to determine if the vulnerability has already been exploited

Patch Information

No official patch information has been published by the vendor at this time. Organizations should monitor the VIAVIWEB website for security updates. Review the VulnCheck SQL Injection Advisory for the latest remediation guidance.

Workarounds

• Implement network-level access controls to restrict access to the administrative interface to trusted IP addresses only
• Deploy a reverse proxy or WAF with SQL injection filtering capabilities in front of the application
• If source code access is available, implement parameterized queries or prepared statements in the authentication logic
• Consider using a third-party authentication solution or disabling the vulnerable login functionality until patched

# Example: Restrict access to admin panel via iptables
iptables -A INPUT -p tcp --dport 80 -s 192.168.1.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP

# Example: Apache .htaccess restriction for admin directory
# Add to .htaccess in the admin directory:
# Order Deny,Allow
# Deny from all
# Allow from 192.168.1.0/24