PT-2021-21344 · 3S Smart Software Solutions · Codesys Ethernetip

Published 2021-08-04 · Updated 2021-08-11 · CVE-2021-36765

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions CODESYS EtherNetIP versions prior to 4.1.0.0

Description The issue is caused by specific EtherNet/IP requests that may lead to a null pointer dereference in the downloaded vulnerable EtherNet/IP stack executed by the CODESYS Control runtime system.

Recommendations For versions prior to 4.1.0.0, update to version 4.1.0.0 or later to resolve the issue.

Fix

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

CVE-2021-36765

Affected Products

Codesys Ethernetip

References · 5

• https://osv.dev/vulnerability/CVE-2021-36765 · Vendor Advisory
• https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=16806&token=3b0c51de5a6e35bccbb413ddaaa56551ca5490f6&download= · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-36765 · Security Note
• https://t.me/cvenotify/18626 · Telegram Post
• https://t.me/cibsecurity/26815 · Telegram Post