7.3
HIGH
CVE-2021-33540
Phoenix Contact AXL F BK/IL BK Unauthenticated Remote Code Execution
Description

In certain devices of the Phoenix Contact AXL F BK and IL BK product families an undocumented password protected FTP access to the root directory exists.

INFO

Published Date :

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

Last Modified :

Nov. 21, 2024, 6:09 a.m.

Remotely Exploitable :

Yes !

Impact Score :

3.4

Exploitability Score :

3.9
Affected Products

The following products are affected by CVE-2021-33540 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 axl_f_bk_pn_tps_xc_firmware
2 Phoenixcontact axl_f_bk_pn_tps_firmware
3 Phoenixcontact axl_f_bk_eip_firmware
4 Phoenixcontact axl_f_bk_eip_ef_firmware
5 Phoenixcontact axl_f_bk_eth_firmware
6 Phoenixcontact axl_f_bk_eth_xc_firmware
7 Phoenixcontact axl_f_bk_s35_firmware
8 Phoenixcontact axl_f_bk_pn_firmware
9 Phoenixcontact axl_f_bk_pn_xc_firmware
10 Phoenixcontact axl_f_bk_eth_net2_firmware
11 Phoenixcontact axl_f_bk_sas_firmware
12 Phoenixcontact il_pn_bk-pac_firmware
13 Phoenixcontact il_pn_bk_di8_do4_2tx-pac_firmware
14 Phoenixcontact il_pn_bk_di8_do4_2scrj-pac_firmware
15 Phoenixcontact il_eth_bk_di8_do4_2tx-xc-pac_firmware
16 Phoenixcontact il_eth_bk_di8_do4_2tx-pac_firmware
17 Phoenixcontact il_eip_bk_di8_do4_2tx-pac_firmware
18 Phoenixcontact il_s3_bk_di8_do4_2tx-pac_firmware
19 Phoenixcontact axl_f_bk_pn
20 Phoenixcontact axl_f_bk_eth
21 Phoenixcontact axl_f_bk_eth_xc
22 Phoenixcontact axl_f_bk_pn_tps_xc
23 Phoenixcontact axl_f_bk_pn_tps
24 Phoenixcontact axl_f_bk_eip
25 Phoenixcontact axl_f_bk_eip_ef
26 Phoenixcontact axl_f_bk_s35
27 Phoenixcontact axl_f_bk_pn_xc
28 Phoenixcontact axl_f_bk_eth_net2
29 Phoenixcontact axl_f_bk_sas
30 Phoenixcontact il_pn_bk-pac
31 Phoenixcontact il_pn_bk_di8_do4_2tx-pac
32 Phoenixcontact il_pn_bk_di8_do4_2scrj-pac
33 Phoenixcontact il_eth_bk_di8_do4_2tx-xc-pac
34 Phoenixcontact il_eth_bk_di8_do4_2tx-pac
35 Phoenixcontact il_eip_bk_di8_do4_2tx-pac
36 Phoenixcontact il_s3_bk_di8_do4_2tx-pac
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-2021-33540.

URL Resource
https://cert.vde.com/en-us/advisories/vde-2021-021 Third Party Advisory
https://cert.vde.com/en-us/advisories/vde-2021-021 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-2021-33540 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-33540 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-2021-021
  • CVE Modified by [email protected]

    May. 14, 2024

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

    Jul. 02, 2021

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:P/A:P)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
    Changed Reference Type https://cert.vde.com/en-us/advisories/vde-2021-021 No Types Assigned https://cert.vde.com/en-us/advisories/vde-2021-021 Third Party Advisory
    Added CPE Configuration AND OR *cpe:2.3:o:phoenixcontact:axl_f_bk_pn_tps_xc_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.30 OR cpe:2.3:h:phoenixcontact:axl_f_bk_pn_tps_xc:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:phoenixcontact:axl_f_bk_pn_tps_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.30 OR cpe:2.3:h:phoenixcontact:axl_f_bk_pn_tps:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:phoenixcontact:axl_f_bk_eip_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.30 OR cpe:2.3:h:phoenixcontact:axl_f_bk_eip:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:phoenixcontact:axl_f_bk_eip_ef_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.30 OR cpe:2.3:h:phoenixcontact:axl_f_bk_eip_ef:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:phoenixcontact:axl_f_bk_eth_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.30 OR cpe:2.3:h:phoenixcontact:axl_f_bk_eth:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:phoenixcontact:axl_f_bk_eth_xc_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.30 OR cpe:2.3:h:phoenixcontact:axl_f_bk_eth_xc:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:phoenixcontact:axl_f_bk_s35_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.40 OR cpe:2.3:h:phoenixcontact:axl_f_bk_s35:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:phoenixcontact:axl_f_bk_pn_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:phoenixcontact:axl_f_bk_pn:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:phoenixcontact:axl_f_bk_pn_xc_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:phoenixcontact:axl_f_bk_pn_xc:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:phoenixcontact:axl_f_bk_eth_net2_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:phoenixcontact:axl_f_bk_eth_net2:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:phoenixcontact:axl_f_bk_sas_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:phoenixcontact:axl_f_bk_sas:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:phoenixcontact:il_pn_bk-pac_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:phoenixcontact:il_pn_bk-pac:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:phoenixcontact:il_pn_bk_di8_do4_2tx-pac_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:phoenixcontact:il_pn_bk_di8_do4_2tx-pac:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:phoenixcontact:il_pn_bk_di8_do4_2scrj-pac_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:phoenixcontact:il_pn_bk_di8_do4_2scrj-pac:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:phoenixcontact:il_eth_bk_di8_do4_2tx-xc-pac_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:phoenixcontact:il_eth_bk_di8_do4_2tx-xc-pac:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:phoenixcontact:il_eth_bk_di8_do4_2tx-pac_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:phoenixcontact:il_eth_bk_di8_do4_2tx-pac:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:phoenixcontact:il_eip_bk_di8_do4_2tx-pac_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:phoenixcontact:il_eip_bk_di8_do4_2tx-pac:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:phoenixcontact:il_s3_bk_di8_do4_2tx-pac_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:phoenixcontact:il_s3_bk_di8_do4_2tx-pac:-:*:*:*:*:*:*:*
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-2021-33540 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-2021-33540 weaknesses.

Exploit Prediction

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

0.08 }} -0.01%

score

0.35498

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
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Scope
Confidentiality
Integrity
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