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CVE-2021-20987— Hilscher: EtherNet/IP stack crash for specific CIP service

Quick assessment

Affected
Hilscher EtherNet/IP Core V2
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Hilscher EtherNet/IP Core是德国Hilscher公司的一款以太网路由器。 Hilscher EtherNet/IP Core V2.13.0.21之前的V2版本存在缓冲区错误漏洞，该漏洞源于拒绝服务和内存破坏漏洞，导致通过网络注入代码或导致设备崩溃而无法恢复。

CVSS 8.6 · High EPSS 1.14% · P65
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I. Basic Information for CVE-2021-20987

Vulnerability Information
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Vulnerability Title
Hilscher: EtherNet/IP stack crash for specific CIP service
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Vulnerability Title
Hilscher EtherNet/IP Core 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Hilscher EtherNet/IP Core是德国Hilscher公司的一款以太网路由器。 Hilscher EtherNet/IP Core V2.13.0.21之前的V2版本存在缓冲区错误漏洞，该漏洞源于拒绝服务和内存破坏漏洞，导致通过网络注入代码或导致设备崩溃而无法恢复。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Hilscher EtherNet/IP Core V2 V2 ~ V2.13.0.21 -
Pepper+Fuchs PCV/PXV/PGV PXV100-F200-B25-V1D, PXV100I-F200-B25-V1D, PCV100-F200-B25-V1D-6011-6720, PCV50-F200-B25-V1D, PCV80-F200-B25-V1D, PCV100-F200-B25-V1D-6011 ~ V1.10.0 -
Pepper+Fuchs WCS WCS3B-LS510, WCS3B-LS510H, WCS3B-LS510D, WCS3B-LS510DH, WCS3B-LS510H-OM, WCS3B-LS510DH-OM, WCS3B-LS510D-OM, WCS3B-LS510-OM ~ V1.2.1 -

II. Public POCs for CVE-2021-20987

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III. Intelligence Information for CVE-2021-20987

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Other References for CVE-2021-20987 (1)

Other References for CVE-2021-20987 (1)

IV. Related Vulnerabilities

Same vendor: Hilscher
Same weakness: CWE-787

V. Comments for CVE-2021-20987

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