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Firewall-Bypass

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critical advisory

Hirschmann HiLCOS OpenBAT/BAT450 IPv6 IPsec Firewall Bypass (CVE-2021-4477)

CVE-2021-4477 describes a firewall bypass vulnerability in Hirschmann HiLCOS OpenBAT and BAT450 products that can be exploited by establishing IPv6 IPsec connections (IKEv1 or IKEv2) while using an IPv6 Internet connection, allowing attackers to bypass configured firewall rules.

cve-2021-4477 firewall-bypass network
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