CVE-2021-21005 HIGH

CVE-2021-21005: Race Condition Vulnerability in Phoenix Contact FL SWITCH SMCS series products

Vendor Phoenix Contact
Product FL SWITCH
Weakness CWE-362
Published June 25, 2021
Last update September 17, 2024
View on NVD All CVEs

CVSS base score

7.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

What the vulnerability does

01Description

In Phoenix Contact FL SWITCH SMCS series products in multiple versions if an attacker sends a hand-crafted TCP-Packet with the Urgent-Flag set and the Urgent-Pointer set to 0, the network stack will crash. The device needs to be rebooted afterwards.

Key dates

02Disclosure timeline

June 25, 2021 CVE published
September 17, 2024 Record updated