CVE-2023-31424 – This vulnerability allows remote unauthenticate... (How to Fix)

Q: What is the severity of CVE-2023-31424?

CVE-2023-31424 has a CVSS score of 8.1 (HIGH). This vulnerability allows remote unauthenticated attackers to bypass authentication and authorization mechanisms in Brocade SANnav's web interface. Affected systems are Brocade SANnav deployments with web interfaces exposed to network access. This enables attackers to gain unauthorized access to administrative functions without valid credentials.

📋 TL;DR

This vulnerability allows remote unauthenticated attackers to bypass authentication and authorization mechanisms in Brocade SANnav's web interface. Affected systems are Brocade SANnav deployments with web interfaces exposed to network access. This enables attackers to gain unauthorized access to administrative functions without valid credentials.

💻 Affected Systems

Products:

Brocade SANnav

Versions: All versions before v2.3.0 and v2.2.2a

Operating Systems: Not OS-specific - runs on SANnav appliance

Default Config Vulnerable: ⚠️ Yes

Notes: Any SANnav deployment with web interface accessible over network is vulnerable. The vulnerability is in the web application itself.

📦 What is this software?

Brocade Sannav by Broadcom

View all CVEs affecting Brocade Sannav →

⚠️ Risk & Real-World Impact

🔴

Worst Case

Complete compromise of SAN management infrastructure, allowing attackers to reconfigure storage networks, disrupt operations, or exfiltrate sensitive data.

🟠

Likely Case

Unauthorized access to SAN management functions, potentially enabling configuration changes, performance monitoring access, or privilege escalation.

🟢

If Mitigated

Limited impact if network segmentation isolates SANnav interfaces from untrusted networks and access controls are properly implemented.

🌐 Internet-Facing: HIGH - Direct exposure allows unauthenticated remote exploitation without any prerequisites.

🏢 Internal Only: HIGH - Even internally, any network-accessible interface remains vulnerable to unauthenticated attacks.

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ⚠️ Yes

Complexity: LOW

Authentication bypass vulnerabilities typically require minimal technical skill to exploit once details are known.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: v2.3.0 or v2.2.2a

Vendor Advisory: https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/22507

Restart Required: Yes

Instructions:

1. Download SANnav v2.3.0 or v2.2.2a from Broadcom support portal. 2. Backup current configuration. 3. Apply the update following Broadcom's upgrade procedures. 4. Restart SANnav services. 5. Verify web interface functionality.

🔧 Temporary Workarounds

Network Segmentation

all

Restrict network access to SANnav web interface using firewall rules or network segmentation.

Access Control Lists

all

Implement strict IP-based access controls to limit which systems can reach the SANnav web interface.

🧯 If You Can't Patch

Implement strict network segmentation to isolate SANnav from all untrusted networks
Deploy web application firewall (WAF) with authentication bypass protection rules

🔍 How to Verify

Check if Vulnerable:

Check SANnav version via web interface or CLI. If version is below v2.3.0 and not v2.2.2a, system is vulnerable.

Check Version:

From SANnav CLI: 'sannav version' or check via web interface login page

Verify Fix Applied:

After patching, verify version shows v2.3.0 or v2.2.2a. Test authentication requirements by attempting to access protected pages without credentials.

📡 Detection & Monitoring

Log Indicators:

Unauthenticated access to administrative URLs
Failed authentication attempts followed by successful access to protected resources
Access from unexpected IP addresses to sensitive endpoints

Network Indicators:

HTTP requests to administrative endpoints without authentication headers
Unusual traffic patterns to SANnav web interface

SIEM Query:

source="sannav" AND (url="*/admin/*" OR url="*/config/*") AND NOT (user!="" OR auth_success="true")

📊 Metadata

CVE ID: CVE-2023-31424

CVSS v3 Score: 8.1 (HIGH)

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE: CWE-290

Published: August 31, 2023

Last Updated: February 13, 2025

🔗 References

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