CVE-2021-20987 : A denial of service and memory corruption vulnerability was found in Hilscher Et

A denial of service and memory corruption vulnerability was found in Hilscher EtherNet/IP Core V2 prior to V2.13.0.21that may lead to code injection through network or make devices crash without recovery.

Published 2021-02-16 17:15:13

Updated 2022-04-26 14:11:27

Source CERT VDE

View at NVD, CVE.org

Vulnerability category: Memory CorruptionDenial of service

Products affected by CVE-2021-20987

Pepperl-fuchs » Wcs Firmware
Versions up to, including, (<=) 1.2.1
cpe:2.3:o:pepperl-fuchs:wcs_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Pepperl-fuchs » Wcs3b-ls510 » Version: N/A
When used together with: Pepperl-fuchs » Wcs3b-ls510-om » Version: N/A
When used together with: Pepperl-fuchs » Wcs3b-ls510d » Version: N/A
When used together with: Pepperl-fuchs » Wcs3b-ls510d-om » Version: N/A
When used together with: Pepperl-fuchs » Wcs3b-ls510dh » Version: N/A
When used together with: Pepperl-fuchs » Wcs3b-ls510dh-om » Version: N/A
When used together with: Pepperl-fuchs » Wcs3b-ls510h » Version: N/A
When used together with: Pepperl-fuchs » Wcs3b-ls510h-om » Version: N/A
Pepperl-fuchs » Pxv100-f200-b25-v1d Firmware
Versions up to, including, (<=) 1.10.0
cpe:2.3:o:pepperl-fuchs:pxv100-f200-b25-v1d_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Pepperl-fuchs » Pxv100-f200-b25-v1d » Version: N/A
Pepperl-fuchs » Pxv100i-f200-b25-v1d Firmware
Versions up to, including, (<=) 1.10.0
cpe:2.3:o:pepperl-fuchs:pxv100i-f200-b25-v1d_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Pepperl-fuchs » Pxv100i-f200-b25-v1d » Version: N/A
Pepperl-fuchs » Pcv100-f200-b25-v1d-6011-6720 Firmware
Versions up to, including, (<=) 1.10.0
cpe:2.3:o:pepperl-fuchs:pcv100-f200-b25-v1d-6011-6720_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Pepperl-fuchs » Pcv100-f200-b25-v1d-6011-6720 » Version: N/A
Pepperl-fuchs » Pcv50-f200-b25-v1d Firmware
Versions up to, including, (<=) 1.10.0
cpe:2.3:o:pepperl-fuchs:pcv50-f200-b25-v1d_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Pepperl-fuchs » Pcv50-f200-b25-v1d » Version: N/A
Pepperl-fuchs » Pcv80-f200-b25-v1d Firmware
Versions up to, including, (<=) 1.10.0
cpe:2.3:o:pepperl-fuchs:pcv80-f200-b25-v1d_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Pepperl-fuchs » Pcv80-f200-b25-v1d » Version: N/A
Pepperl-fuchs » Pcv100-f200-b25-v1d-6011 Firmware
Versions up to, including, (<=) 1.10.0
cpe:2.3:o:pepperl-fuchs:pcv100-f200-b25-v1d-6011_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Pepperl-fuchs » Pcv100-f200-b25-v1d-6011 » Version: N/A
Hilscher » Ethernet/ip Adapter Firmware
Versions from including (>=) 2.0 and before (<) 2.13.0.21
cpe:2.3:o:hilscher:ethernet\/ip_adapter_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Hilscher » Ethernet/ip Adapter » Version: N/A

Exploit prediction scoring system (EPSS) score for CVE-2021-20987

EPSS FAQ

0.37%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 58 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-20987

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
7.8	HIGH	AV:N/AC:L/Au:N/C:N/I:N/A:C	10.0	6.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Complete
8.6	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H	3.9	4.0	CERT VDE
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Changed Confidentiality: None Integrity: None Availability: High
8.6	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H	3.9	4.0	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Changed Confidentiality: None Integrity: None Availability: High

CWE ids for CVE-2021-20987

CWE-787 Out-of-bounds Write

The product writes data past the end, or before the beginning, of the intended buffer.
Assigned by:
- info@cert.vde.com (Secondary)
- nvd@nist.gov (Primary)

References for CVE-2021-20987

https://kb.hilscher.com/pages/viewpage.action?pageId=108969480

2019-08-08 EtherNet/IP stack crash for specific CIP service - Hilscher Cyber Security - Knowledgebase
Vendor Advisory
https://cert.vde.com/en-us/advisories/vde-2021-007

PEPPERL+FUCHS: Multiple Products - Vulnerability may allow remote attackers to cause a Denial Of Service — English (USA)
Third Party Advisory

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Vulnerability Details : CVE-2021-20987

Products affected by CVE-2021-20987

Exploit prediction scoring system (EPSS) score for CVE-2021-20987

CVSS scores for CVE-2021-20987

CWE ids for CVE-2021-20987

References for CVE-2021-20987