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CVE-2017-20233— Hirschmann HiLCOS Layer-2 Firewall Multicast Broadcast Traffic Bypass

Quick assessment

Affected
Belden Hirschmann HiLCOS OpenBAT, BAT450, WLC
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.

Belden Hirschmann HiLCOS OpenBAT等都是美国Belden公司的产品。Belden Hirschmann HiLCOS OpenBAT是一款工业级无线局域网设备。Belden Hirschmann HiLCOS BAT450是一款工业级无线局域网接入点设备。Belden Hirschmann HiLCOS BAT867是一款工业级无线局域网接入点设备。 Belden多款产品存在访问控制错误漏洞，该漏洞源于防火墙过滤功能在管理IP地址过滤禁用时无法正确过滤IPv4组播和广播流量，

CVSS 5.4 · Medium EPSS 0.20% · P9

Affected Version Matrix 4

VendorProduct Version RangeStatus
Belden Hirschmann HiLCOS BAT867 ≤ 9.14.5500-REL affected
affected
Belden Hirschmann HiLCOS OpenBAT, BAT450, WLC ≤ 9.10.5126-REL affected
≤ 9.12.5500-REL affected
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I. Basic Information for CVE-2017-20233

Vulnerability Information
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Vulnerability Title
Hirschmann HiLCOS Layer-2 Firewall Multicast Broadcast Traffic Bypass
Source: CVE Program / CVE List V5
Vulnerability Description
Hirschmann HiLCOS products OpenBAT, BAT450, WLC, BAT867 contains a firewall filtering vulnerability that fails to correctly filter IPv4 multicast and broadcast traffic when management IP address filtering is disabled, allowing configured filter rules to be bypassed. Attackers with network access can inject or observe multicast and broadcast packets that should have been blocked by the firewall.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Belden多款产品 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Belden Hirschmann HiLCOS OpenBAT等都是美国Belden公司的产品。Belden Hirschmann HiLCOS OpenBAT是一款工业级无线局域网设备。Belden Hirschmann HiLCOS BAT450是一款工业级无线局域网接入点设备。Belden Hirschmann HiLCOS BAT867是一款工业级无线局域网接入点设备。 Belden多款产品存在访问控制错误漏洞，该漏洞源于防火墙过滤功能在管理IP地址过滤禁用时无法正确过滤IPv4组播和广播流量，
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
Belden Hirschmann HiLCOS OpenBAT, BAT450, WLC 0 ~ 9.10.5126-REL -
Belden Hirschmann HiLCOS BAT867 0 ~ 9.14.5500-REL -

II. Public POCs for CVE-2017-20233

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III. Intelligence Information for CVE-2017-20233

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Same Patch Batch · Belden · 2026-04-03 · 11 CVEs total

CVE-2017-20237 9.8 CRITICAL Hirschmann Industrial HiVision Authentication Bypass Remote Code Execution
CVE-2018-25237 9.8 CRITICAL Hirschmann HiSecOS Buffer Overflow via HTTPS Login
CVE-2018-25236 9.8 CRITICAL Hirschmann HiOS HiSecOS Authentication Bypass via HTTP Management
CVE-2017-20234 9.8 CRITICAL GarrettCom Magnum 6K and 10K Authentication Bypass via Hardcoded String
CVE-2021-4477 9.1 CRITICAL Hirschmann HiLCOS OpenBAT BAT450 IPv6 IPsec Firewall Bypass
CVE-2015-10148 8.2 HIGH Hirschmann HiLCOS Hard-coded Credentials SSH SSL Keys
CVE-2016-15058 8.1 HIGH Hirschmann HiLCOS Classic Platform Password Exposure via SNMP
CVE-2020-37216 7.5 HIGH Hirschmann HiOS EtherNet/IP Stack Denial of Service
CVE-2022-4987 7.3 HIGH Hirschmann Industrial HiVision External Application Path Hijacking Leading to Arbitrary Co
CVE-2017-20238 7.1 HIGH Hirschmann Industrial HiVision Improper Authorization Privilege Escalation

IV. Related Vulnerabilities

Same vendor: Belden
Same weakness: CWE-284

V. Comments for CVE-2017-20233

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