medium
5.3
CWE
404
Advisory Published
Updated

CVE-2021-21003: Denial of Service Vulnerability in Phoenix Contact FL SWITCH SMCS series products

First published: Fri Jun 25 2021(Updated: )

In Phoenix Contact FL SWITCH SMCS series products in multiple versions fragmented TCP-Packets may cause a Denial of Service of Web-, SNMP- and ICMP-Echo services. The switching functionality of the device is not affected.

Credit: info@cert.vde.com

Affected SoftwareAffected VersionHow to fix
Phoenixcontact Fl Switch Smcs 16tx Firmware<=4.70
Phoenixcontact Fl Switch Smcs 16tx
Phoenixcontact Fl Switch Smcs 14tx\/2fx Firmware<=4.70
Phoenixcontact Fl Switch Smcs 14tx\/2fx
Phoenixcontact Fl Switch Smcs 14tx\/2fx-sm Firmware<=4.70
Phoenixcontact Fl Switch Smcs 14tx\/2fx-sm
Phoenixcontact Fl Switch Smcs 8gt Firmware<=4.70
Phoenixcontact Fl Switch Smcs 8gt
Phoenixcontact Fl Switch Smcs 6gt\/2sfp Firmware<=4.70
Phoenixcontact Fl Switch Smcs 6gt\/2sfp
Phoenixcontact Fl Switch Smcs 8tx-pn Firmware<=4.70
Phoenixcontact Fl Switch Smcs 8tx-pn
Phoenixcontact Fl Switch Smcs 4tx-pn Firmware<=4.70
Phoenixcontact Fl Switch Smcs 4tx-pn
Phoenixcontact Fl Switch Smcs 8tx Firmware<=4.70
Phoenixcontact Fl Switch Smcs 8tx
Phoenixcontact Fl Switch Smcs 6tx\/2sfp Firmware<=4.70
Phoenixcontact Fl Switch Smcs 6tx\/2sfp
Phoenixcontact Fl Switch Smn 6tx\/2pof-pn Firmware<=4.70
Phoenixcontact Fl Switch Smn 6tx\/2pof-pn
Phoenixcontact Fl Switch Smn 8tx-pn Firmware<=4.70
Phoenixcontact Fl Switch Smn 8tx-pn
Phoenixcontact Fl Switch Smn 6tx\/2fx Firmware<=4.70
Phoenixcontact Fl Switch Smn 6tx\/2fx
Phoenixcontact Fl Switch Smn 6tx\/2fx Sm Firmware<=4.70
Phoenixcontact Fl Switch Smn 6tx\/2fx Sm
Phoenixcontact Fl Nat Smn 8tx Firmware<=4.63
Phoenixcontact Fl Nat Smn 8tx
Phoenixcontact Fl Nat Smn 8tx-m Firmware<=4.63
Phoenixcontact Fl Nat Smn 8tx-m

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Reference Links

Frequently Asked Questions

  • What is the vulnerability ID for this Phoenix Contact FL SWITCH SMCS series products vulnerability?

    The vulnerability ID for this Phoenix Contact FL SWITCH SMCS series products vulnerability is CVE-2021-21003.

  • What is the severity of CVE-2021-21003?

    The severity of CVE-2021-21003 is medium with a severity value of 5.3.

  • What is the impact of CVE-2021-21003?

    CVE-2021-21003 can cause a Denial of Service of Web-, SNMP- and ICMP-Echo services on Phoenix Contact FL SWITCH SMCS series products.

  • How can I fix CVE-2021-21003?

    To fix CVE-2021-21003, it is recommended to update the firmware of Phoenix Contact FL SWITCH SMCS series products to version 4.70 or later.

  • Where can I find more information about CVE-2021-21003?

    More information about CVE-2021-21003 can be found at the following reference: [link](https://cert.vde.com/en-us/advisories/vde-2021-023).

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