CVE-2023-7244Network attack vector

Code execution via out-of-bounds packet parsing

Published Mar 1, 2024 · Updated Aug 5, 2024

An out-of-bounds write in CISA ICSNPP-ETHERCAT through d78dda6 allows remote attackers to execute code via EtherCAT packets. The plugin's primary analysis function writes beyond an allocated buffer while parsing attacker-controlled EtherCAT packet fields; public materials do not identify the exact field or operation. Any traffic source whose crafted EtherCAT packets reach a Zeek sensor running the plugin can corrupt memory, crash Zeek, or execute code in its process.

CVSS severity9.8
Critical
EPSS probability0.82%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An out-of-bounds write in CISA ICSNPP-ETHERCAT through d78dda6 allows remote attackers to execute code via EtherCAT packets. The plugin's primary analysis function writes beyond an allocated buffer while parsing attacker-controlled EtherCAT packet fields; public materials do not identify the exact field or operation. Any traffic source whose crafted EtherCAT packets reach a Zeek sensor running the plugin can corrupt memory, crash Zeek, or execute code in its process.

The record

CVE
CVE-2023-7244
Published
Mar 1, 2024
Updated
Aug 5, 2024
Vendor
Cybersecurity and Infrastructure Security Agency (CISA)
Product
ICSNPP-ETHERCAT
Classifications
CWE-787
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 1, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=0 <=d78dda6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Cybersecurity and Infrastructure Security Agency (CISA) · ICSNPP-ETHERCATversion=0 <=d78dda6

Published CVSS scores

9.8ICS-CERTCVSS: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

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

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Your stack

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