CVE-2022-43605Network attack vector

Server crash via unchecked attribute-count loop

Published Mar 16, 2023 · Updated Aug 3, 2024

Out-of-bounds write in EIP Stack Group OpENer commit 58ee13c allows remote attackers to crash the server via crafted EtherNet/IP requests. SetAttributeList trusts attribute_count_request as a loop bound; counts above 0x80 advance the response pointer beyond EnipMessage before AddIntToMessage writes attacker-controlled data. Network access is sufficient without authentication or user interaction; a process crash is demonstrated, while code execution is not demonstrated.

CVSS severity10.0
Critical
EPSS probability14.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Out-of-bounds write in EIP Stack Group OpENer commit 58ee13c allows remote attackers to crash the server via crafted EtherNet/IP requests. SetAttributeList trusts attribute_count_request as a loop bound; counts above 0x80 advance the response pointer beyond EnipMessage before AddIntToMessage writes attacker-controlled data. Network access is sufficient without authentication or user interaction; a process crash is demonstrated, while code execution is not demonstrated.

The record

CVE
CVE-2022-43605
Published
Mar 16, 2023
Updated
Aug 3, 2024
Vendor
EIP Stack Group
Product
OpENer
Classifications
CWE-787, T0866
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 16, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2022-10-18
  2. Affected versionversion=development commit 58ee13c

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

EIP Stack Group · OpENerversion=0 <2022-10-18; version=development commit 58ee13c

Published CVSS scores

10.0Cisco TalosCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T0866Exploitation of Remote Services

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo