PT-2021-14329 · Phoenix Contact · Phoenix Contact Fl Comserver Uni

Petri Tuomio · Published 2021-06-25 · Updated 2021-07-01 · CVE-2021-21002

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions: Phoenix Contact FL COMSERVER UNI versions prior to 2.40

Description: The issue is related to an invalid Modbus exception response that can cause a temporary denial of service.

Recommendations: For versions prior to 2.40, update to version 2.40 or later to resolve the issue.

Fix

Missing Release of Resource after Effective Lifetime

Weakness Enumeration

CWE-772

Related Identifiers

CVE-2021-21002

Affected Products

Phoenix Contact Fl Comserver Uni

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2021-21002 · Security Note
• https://osv.dev/vulnerability/CVE-2021-21002 · Vendor Advisory
• https://cert.vde.com/en-us/advisories/vde-2021-022 · Note