CVE-2022-4333 – CVE-2022-4333 involves hardcoded credentials in... (How to Fix)

Q: What is the severity of CVE-2022-4333?

CVE-2022-4333 has a CVSS score of 9.8 (CRITICAL). CVE-2022-4333 involves hardcoded credentials in multiple SPRECON-E CPU variants from Sprecher Automation, allowing remote attackers to take over affected devices. This affects industrial control systems using these programmable logic controllers. The vulnerability stems from default accounts that should have been deactivated per vendor hardening guidelines.

📋 TL;DR

CVE-2022-4333 involves hardcoded credentials in multiple SPRECON-E CPU variants from Sprecher Automation, allowing remote attackers to take over affected devices. This affects industrial control systems using these programmable logic controllers. The vulnerability stems from default accounts that should have been deactivated per vendor hardening guidelines.

💻 Affected Systems

Products:

SPRECON-E CPU variants

Versions: All versions prior to vendor remediation

Operating Systems: Embedded firmware

Default Config Vulnerable: ⚠️ Yes

Notes: Specifically affects SPRECON-E CPU devices with default/hardcoded credentials not deactivated per hardening guidelines.

📦 What is this software?

⚠️ Risk & Real-World Impact

🔴

Worst Case

Complete compromise of industrial control systems leading to physical process manipulation, production shutdown, safety system bypass, or environmental damage.

🟠

Likely Case

Unauthorized access to PLC programming and configuration, manipulation of industrial processes, data exfiltration, or denial of service.

🟢

If Mitigated

Limited impact if proper network segmentation and access controls prevent remote exploitation attempts.

🌐 Internet-Facing: HIGH

🏢 Internal Only: HIGH

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: LIKELY

Unauthenticated Exploit: ⚠️ Yes

Complexity: LOW

Exploitation requires knowledge of hardcoded credentials which may be publicly available or easily discovered.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Refer to vendor advisory for specific firmware updates

Vendor Advisory: https://www.sprecher-automation.com/fileadmin/itSecurity/PDF/2022-12_Advisories.pdf

Restart Required: Yes

Instructions:

1. Consult vendor advisory for affected models. 2. Apply firmware updates from Sprecher Automation. 3. Follow hardening guidelines to deactivate default accounts. 4. Restart affected devices.

🔧 Temporary Workarounds

Network Segmentation

all

Isolate SPRECON-E devices in dedicated industrial network segments with strict firewall rules.

Access Control Lists

all

Implement strict network ACLs to limit access to SPRECON-E devices to authorized engineering stations only.

🧯 If You Can't Patch

Implement network segmentation to isolate affected devices from untrusted networks
Deploy industrial firewall with strict rules allowing only necessary protocols from authorized sources

🔍 How to Verify

Check if Vulnerable:

Check device configuration for presence of default/hardcoded accounts that should have been deactivated per hardening guidelines.

Check Version:

Consult SPRECON-E device documentation for firmware version checking procedure

Verify Fix Applied:

Verify firmware version matches vendor-recommended patched version and confirm default accounts are deactivated.

📡 Detection & Monitoring

Log Indicators:

Unauthorized authentication attempts
Configuration changes from unexpected sources
Multiple failed login attempts followed by successful login

Network Indicators:

Unexpected connections to SPRECON-E management ports
Traffic patterns inconsistent with normal industrial operations

SIEM Query:

source_ip=* AND (destination_port=502 OR destination_port=44818) AND event_type="authentication" AND result="success"

📊 Metadata

CVE ID: CVE-2022-4333

CVSS v3 Score: 9.8 (CRITICAL)

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

CWE: CWE-798

Published: June 1, 2023

Last Updated: November 21, 2024

🔗 References

https://www.sprecher-automation.com/fileadmin/itSecurity/PDF/2022-12_Advisories.pdf Vendor Advisory
https://www.sprecher-automation.com/fileadmin/itSecurity/PDF/2022-12_Advisories.pdf Vendor Advisory

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