CVE-2017-20233 Details
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.
A vulnerability exists in Hirschmann HiLCOS products OpenBAT, BAT450, WLC, and BAT867, specifically in versions through 9.12.5600-RU1 for the first three products and through 9.14.5600-RU1 for BAT867. The issue arises because the Layer-2 Firewall does not properly filter IPv4 multicast and broadcast traffic when management IP address filtering is turned off. This misconfiguration allows multicast and broadcast packets that should be blocked to bypass the firewall entirely. As a result, an attacker with network access could inject or intercept multicast and broadcast traffic that should have been filtered out.
Users are advised to update to HiLCOS version 9.12.5600-RU1 or higher for OpenBAT, BAT450, and WLC, and to version 9.14.5600-RU1 or higher for BAT867. As a temporary workaround, the 'Filter Management Packets' option can be activated to restore proper filtering for packets directed to the device's management IP address.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Apr 6, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-284 | Improper Access Control | [email protected] |
Affected Products
No affected product data is available for this CVE.
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 21, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 3, 2026 | New CVE Received | [email protected] |