CVE-2022-1737 – This vulnerability in Pyramid Solutions' EtherN... (How to Fix)

Q: What is the severity of CVE-2022-1737?

CVE-2022-1737 has a CVSS score of 9.8 (CRITICAL). This vulnerability in Pyramid Solutions' EtherNet/IP products allows an unauthorized attacker to send specially crafted packets causing an out-of-bounds write. This can lead to denial-of-service conditions affecting industrial control systems. Organizations using Pyramid Solutions' Developer and DLL kits for EtherNet/IP Adapter and Scanner are affected.

📋 TL;DR

This vulnerability in Pyramid Solutions' EtherNet/IP products allows an unauthorized attacker to send specially crafted packets causing an out-of-bounds write. This can lead to denial-of-service conditions affecting industrial control systems. Organizations using Pyramid Solutions' Developer and DLL kits for EtherNet/IP Adapter and Scanner are affected.

💻 Affected Systems

Products:

Pyramid Solutions Developer Kit for EtherNet/IP Adapter
Pyramid Solutions Developer Kit for EtherNet/IP Scanner
Pyramid Solutions DLL Kit for EtherNet/IP Adapter
Pyramid Solutions DLL Kit for EtherNet/IP Scanner

Versions: All versions prior to patched versions

Operating Systems: Windows, Linux, Embedded systems using affected kits

Default Config Vulnerable: ⚠️ Yes

Notes: Affects both development kits and runtime components built with these kits. Industrial control systems using these components are vulnerable.

📦 What is this software?

⚠️ Risk & Real-World Impact

🔴

Worst Case

Complete system crash or device reboot causing operational disruption in industrial environments, potentially affecting critical infrastructure processes.

🟠

Likely Case

Denial-of-service affecting EtherNet/IP communication, disrupting industrial automation processes and requiring manual intervention to restore functionality.

🟢

If Mitigated

Limited impact with proper network segmentation and monitoring, potentially causing temporary communication interruptions without affecting core industrial processes.

🌐 Internet-Facing: HIGH - CVSS 9.8 indicates critical severity with network-accessible attack vector and no authentication required.

🏢 Internal Only: HIGH - Even internally, the vulnerability can be exploited by any network-connected attacker to disrupt industrial operations.

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ⚠️ Yes

Complexity: LOW

No authentication required, network-accessible, and out-of-bounds write vulnerabilities are often easier to exploit than other memory corruption issues.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Contact Pyramid Solutions for specific patched versions

Vendor Advisory: https://www.cisa.gov/uscert/ics/advisories/icsa-22-174-04

Restart Required: Yes

Instructions:

1. Contact Pyramid Solutions for updated versions
2. Update affected Developer and DLL kits
3. Recompile and redeploy applications using updated kits
4. Restart affected systems and devices

🔧 Temporary Workarounds

Network Segmentation

all

Isolate EtherNet/IP devices and development systems from untrusted networks

Firewall Rules

all

Restrict access to EtherNet/IP ports (typically TCP/UDP 44818) to authorized systems only

🧯 If You Can't Patch

Implement strict network segmentation and firewall rules to limit access to affected systems
Monitor network traffic for anomalous EtherNet/IP packets and implement intrusion detection

🔍 How to Verify

Check if Vulnerable:

Check if using Pyramid Solutions EtherNet/IP Developer or DLL kits. Review system documentation and installed software.

Check Version:

Contact Pyramid Solutions for version verification tools specific to their products

Verify Fix Applied:

Verify with Pyramid Solutions that updated kits are installed and applications have been recompiled with patched versions.

📡 Detection & Monitoring

Log Indicators:

System crashes
Unexpected reboots
EtherNet/IP communication failures
Memory access violation errors

Network Indicators:

Malformed EtherNet/IP packets
Unusual traffic patterns on port 44818
Packets with abnormal structure or size

SIEM Query:

source="network" AND (port=44818 OR protocol="EtherNet/IP") AND (packet_size>normal OR malformed_packet=true)

📊 Metadata

CVE ID: CVE-2022-1737

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-787

Published: July 12, 2022

Last Updated: November 21, 2024

🔗 References

https://www.cisa.gov/uscert/ics/advisories/icsa-22-174-04 Third Party Advisory,US Government Resource
https://www.cisa.gov/uscert/ics/advisories/icsa-22-174-04 Third Party Advisory,US Government Resource

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