5.3
MEDIUM
CVE-2021-21003
Phoenix Contact FL SWITCH SMCS Denial of Service Vulnerability
Description

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.

INFO

Published Date :

June 25, 2021, 7:15 p.m.

Last Modified :

Nov. 21, 2024, 5:47 a.m.

Remotely Exploitable :

Yes !

Impact Score :

1.4

Exploitability Score :

3.9
Affected Products

The following products are affected by CVE-2021-21003 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Phoenixcontact fl_nat_smn_8tx-m_firmware
2 Phoenixcontact fl_nat_smn_8tx_firmware
3 Phoenixcontact fl_switch_smcs_16tx_firmware
4 Phoenixcontact fl_switch_smcs_14tx\/2fx_firmware
5 Phoenixcontact fl_switch_smcs_14tx\/2fx-sm_firmware
6 Phoenixcontact fl_switch_smcs_8gt_firmware
7 Phoenixcontact fl_switch_smcs_6gt\/2sfp_firmware
8 Phoenixcontact fl_switch_smcs_8tx-pn_firmware
9 Phoenixcontact fl_switch_smcs_4tx-pn_firmware
10 Phoenixcontact fl_switch_smcs_8tx_firmware
11 Phoenixcontact fl_switch_smcs_6tx\/2sfp_firmware
12 Phoenixcontact fl_switch_smn_6tx\/2pof-pn_firmware
13 Phoenixcontact fl_switch_smn_8tx-pn_firmware
14 Phoenixcontact fl_switch_smn_6tx\/2fx_firmware
15 Phoenixcontact fl_switch_smn_6tx\/2fx_sm_firmware
16 Phoenixcontact fl_nat_smn_8tx-m
17 Phoenixcontact fl_nat_smn_8tx
18 Phoenixcontact fl_switch_smcs_16tx
19 Phoenixcontact fl_switch_smcs_14tx\/2fx
20 Phoenixcontact fl_switch_smcs_14tx\/2fx-sm
21 Phoenixcontact fl_switch_smcs_8gt
22 Phoenixcontact fl_switch_smcs_6gt\/2sfp
23 Phoenixcontact fl_switch_smcs_8tx-pn
24 Phoenixcontact fl_switch_smcs_4tx-pn
25 Phoenixcontact fl_switch_smcs_8tx
26 Phoenixcontact fl_switch_smcs_6tx\/2sfp
27 Phoenixcontact fl_switch_smn_6tx\/2pof-pn
28 Phoenixcontact fl_switch_smn_8tx-pn
29 Phoenixcontact fl_switch_smn_6tx\/2fx
30 Phoenixcontact fl_switch_smn_6tx\/2fx_sm
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2021-21003.

URL Resource
https://cert.vde.com/en-us/advisories/vde-2021-023 Third Party Advisory
https://cert.vde.com/en-us/advisories/vde-2021-023 Third Party Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2021-21003 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-21003 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference https://cert.vde.com/en-us/advisories/vde-2021-023
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Initial Analysis by [email protected]

    Jul. 01, 2021

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:N/A:P)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
    Changed Reference Type https://cert.vde.com/en-us/advisories/vde-2021-023 No Types Assigned https://cert.vde.com/en-us/advisories/vde-2021-023 Third Party Advisory
    Added CPE Configuration AND OR *cpe:2.3:o:phoenixcontact:fl_switch_smcs_16tx_firmware:*:*:*:*:*:*:*:* versions up to (including) 4.70 OR cpe:2.3:h:phoenixcontact:fl_switch_smcs_16tx:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:phoenixcontact:fl_switch_smcs_14tx\/2fx_firmware:*:*:*:*:*:*:*:* versions up to (including) 4.70 OR cpe:2.3:h:phoenixcontact:fl_switch_smcs_14tx\/2fx:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:phoenixcontact:fl_switch_smcs_14tx\/2fx-sm_firmware:*:*:*:*:*:*:*:* versions up to (including) 4.70 OR cpe:2.3:h:phoenixcontact:fl_switch_smcs_14tx\/2fx-sm:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:phoenixcontact:fl_switch_smcs_8gt_firmware:*:*:*:*:*:*:*:* versions up to (including) 4.70 OR cpe:2.3:h:phoenixcontact:fl_switch_smcs_8gt:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:phoenixcontact:fl_switch_smcs_6gt\/2sfp_firmware:*:*:*:*:*:*:*:* versions up to (including) 4.70 OR cpe:2.3:h:phoenixcontact:fl_switch_smcs_6gt\/2sfp:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:phoenixcontact:fl_switch_smcs_8tx-pn_firmware:*:*:*:*:*:*:*:* versions up to (including) 4.70 OR cpe:2.3:h:phoenixcontact:fl_switch_smcs_8tx-pn:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:phoenixcontact:fl_switch_smcs_4tx-pn_firmware:*:*:*:*:*:*:*:* versions up to (including) 4.70 OR cpe:2.3:h:phoenixcontact:fl_switch_smcs_4tx-pn:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:phoenixcontact:fl_switch_smcs_8tx_firmware:*:*:*:*:*:*:*:* versions up to (including) 4.70 OR cpe:2.3:h:phoenixcontact:fl_switch_smcs_8tx:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:phoenixcontact:fl_switch_smcs_6tx\/2sfp_firmware:*:*:*:*:*:*:*:* versions up to (including) 4.70 OR cpe:2.3:h:phoenixcontact:fl_switch_smcs_6tx\/2sfp:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:phoenixcontact:fl_switch_smn_6tx\/2pof-pn_firmware:*:*:*:*:*:*:*:* versions up to (including) 4.70 OR cpe:2.3:h:phoenixcontact:fl_switch_smn_6tx\/2pof-pn:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:phoenixcontact:fl_switch_smn_8tx-pn_firmware:*:*:*:*:*:*:*:* versions up to (including) 4.70 OR cpe:2.3:h:phoenixcontact:fl_switch_smn_8tx-pn:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:phoenixcontact:fl_switch_smn_6tx\/2fx_firmware:*:*:*:*:*:*:*:* versions up to (including) 4.70 OR cpe:2.3:h:phoenixcontact:fl_switch_smn_6tx\/2fx:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:phoenixcontact:fl_switch_smn_6tx\/2fx_sm_firmware:*:*:*:*:*:*:*:* versions up to (including) 4.70 OR cpe:2.3:h:phoenixcontact:fl_switch_smn_6tx\/2fx_sm:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:phoenixcontact:fl_nat_smn_8tx_firmware:*:*:*:*:*:*:*:* versions up to (including) 4.63 OR cpe:2.3:h:phoenixcontact:fl_nat_smn_8tx:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:phoenixcontact:fl_nat_smn_8tx-m_firmware:*:*:*:*:*:*:*:* versions up to (including) 4.63 OR cpe:2.3:h:phoenixcontact:fl_nat_smn_8tx-m:-:*:*:*:*:*:*:*
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-21003 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2021-21003 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.09 }} 0.00%

score

0.40888

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability