Ethercat Zeek Plugin Out-of-bounds Read

published 2024-03-01 2 y ago modified 2026-06-17 4 mo ago also EUVD-2023-59423

cvss: 8.2; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 41%
public exploits: 0; none known

Industrial Control Systems Network Protocol Parsers (ICSNPP) - Ethercat Zeek Plugin versions d78dda6 and prior are vulnerable to out-of-bounds read during the process of analyzing a specific Ethercat packet. This could allow an attacker to crash the Zeek process and leak some information in memory.

Patch / fix

fixed in 1

cisa icsnpp-ethercat d78dda6

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-24-051-02 updated 2024-02-20 cvss 8.2

ICSNPP - Ethercat Zeek Plugin

CISA Industrial Control Systems Network Protocol Parsers (ICSNPP) - Ethercat Zeek Plugin <=d78dda6
affected: vendor fix, mitigation “To help reduce successful exploitation, users are encouraged to keep critical software updates and patches up to date in their system networks.” github.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 2 y ago (2024-03-04)

Exploit prediction

0.48% chance of exploitation in the next 30 days, higher than 41% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.2	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
NVD	3.1	8.2	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

Affected products

CISA Industrial Control Systems Network Protocol Parsers (ICSNPP) - Ethercat Plugin for Zeek
cisa icsnpp-ethercat

Classification

Weakness

CWE-125 Out-of-bounds Read

References

cisa.gov /news-events/ics-advisories/icsa-24-051-02
us-government-resource, vendor-advisory

Sources

CVE List CVE-2023-7242
NVD CVE-2023-7242

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary