CVE-2020-29574: Sophos Cyberoam SQL Injection Vulnerability

CVE-2020-29574 Overview

CVE-2020-29574 is a critical SQL injection vulnerability affecting the WebAdmin interface of Cyberoam OS, a network security appliance operating system developed by Sophos. This vulnerability allows unauthenticated remote attackers to execute arbitrary SQL statements against the backend database, potentially leading to complete system compromise, data exfiltration, and unauthorized administrative access.

Critical Impact

This vulnerability is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, indicating active exploitation in the wild. Unauthenticated attackers can remotely execute arbitrary SQL commands through the WebAdmin interface, potentially compromising the entire network security appliance.

Affected Products

• Sophos Cyberoam OS (all versions through 2020-12-04)
• Cyberoam Next-Generation Firewall (NGFW) appliances running vulnerable Cyberoam OS versions
• Enterprise network environments utilizing Cyberoam WebAdmin for appliance management

Discovery Timeline

• 2020-12-11 - CVE-2020-29574 published to NVD
• 2025-11-07 - Last updated in NVD database

Technical Details for CVE-2020-29574

Vulnerability Analysis

This SQL injection vulnerability exists within the WebAdmin web-based management interface of Cyberoam OS. The vulnerability stems from improper sanitization of user-supplied input before it is incorporated into SQL queries executed against the backend database. Because the WebAdmin interface is network-accessible and the vulnerability does not require authentication, attackers can exploit this flaw remotely without valid credentials.

The attack surface is particularly concerning because WebAdmin interfaces on network security appliances are often exposed to management networks and, in some misconfigurations, may be accessible from the internet. Successful exploitation enables attackers to read, modify, or delete sensitive data from the database, potentially including configuration data, user credentials, and security policies.

Root Cause

The root cause of CVE-2020-29574 is classified as CWE-89 (Improper Neutralization of Special Elements used in an SQL Command). The WebAdmin application fails to properly validate, sanitize, or parameterize user input before constructing SQL queries. This allows attackers to inject malicious SQL syntax that alters the intended query logic, enabling unauthorized database operations.

The vulnerability likely exists in form fields, URL parameters, or API endpoints within the WebAdmin interface where user-controlled data is concatenated directly into SQL query strings without proper escaping or the use of prepared statements.

Attack Vector

The attack vector for this vulnerability is network-based and does not require any authentication or user interaction. An attacker with network access to the WebAdmin interface can craft malicious HTTP requests containing SQL injection payloads. These payloads are processed by the vulnerable application and executed against the database.

A typical attack scenario involves an attacker identifying a vulnerable input field in the WebAdmin login page or management interface, then systematically injecting SQL statements to enumerate database contents, extract sensitive information, or modify security configurations. Advanced exploitation could lead to command execution on the underlying operating system depending on database privileges and system configuration.

Detection Methods for CVE-2020-29574

Indicators of Compromise

• Unusual SQL error messages or stack traces in WebAdmin access logs indicating injection attempts
• Unexpected database queries or modifications appearing in database audit logs
• Authentication bypass events or unauthorized administrative sessions
• Anomalous outbound network connections from the Cyberoam appliance to unknown destinations
• Modified firewall rules, security policies, or user accounts without authorized changes

Detection Strategies

• Deploy web application firewalls (WAF) with SQL injection detection signatures in front of WebAdmin interfaces
• Monitor WebAdmin access logs for patterns consistent with SQL injection attacks, such as single quotes, UNION SELECT statements, and comment characters
• Implement intrusion detection system (IDS) rules to identify SQL injection payload patterns in HTTP traffic
• Configure database query logging to detect anomalous or unauthorized SQL statements
• Use SentinelOne Singularity platform to monitor for post-exploitation activities and lateral movement originating from compromised appliances

Monitoring Recommendations

• Enable comprehensive logging on all Cyberoam appliances and forward logs to a centralized SIEM solution
• Monitor for multiple failed authentication attempts followed by successful administrative access
• Track changes to critical configuration files and security policies on network appliances
• Implement network segmentation monitoring to detect unauthorized access attempts to management interfaces
• Review database backup integrity regularly to detect potential data manipulation

How to Mitigate CVE-2020-29574

Immediate Actions Required

• Apply the latest security patches from Sophos to all affected Cyberoam OS installations immediately
• Restrict network access to WebAdmin interfaces to trusted management networks only
• Implement IP allowlisting for administrative access to Cyberoam appliances
• Audit existing user accounts and administrative sessions for unauthorized access
• Review and restore security policies if any unauthorized modifications are detected

Patch Information

Sophos has addressed this vulnerability in security updates for Cyberoam OS. Organizations should consult the BleepingComputer Security Update for details on the fix and ensure all appliances are updated to patched versions. Given that this vulnerability is listed in the CISA Known Exploited Vulnerabilities Catalog, immediate patching is critical for organizations subject to CISA directives.

Workarounds

• Disable WebAdmin access from untrusted networks and require VPN connectivity for remote administration
• Implement a reverse proxy with WAF capabilities in front of the WebAdmin interface to filter malicious requests
• Use network access control lists (ACLs) to restrict management interface access to specific IP addresses
• Consider temporarily disabling the WebAdmin interface if remote management is not immediately required
• Enable two-factor authentication for administrative access where supported to add an additional security layer

# Example: Restrict WebAdmin access to management VLAN only
# Apply network ACL on perimeter firewall or switch
iptables -A INPUT -p tcp --dport 443 -s 10.0.0.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP