CVE-2021-27861: Improper Handling of Length Parameter Inconsistency

Layer 2 network filtering capabilities such as IPv6 RA guard can be bypassed using LLC/SNAP headers with invalid length and optionally VLAN0 headers...

多款Cisco产品安全漏洞

Cisco IOS and others are products of Cisco Corporation.Cisco IOS is a set of operating systems developed for its network devices.Cisco IOS XE Software is an operating system.Cisco Small Business is a switch.Cisco IOS XE Software is an operating system.Cisco Small Business is a switch. Cisco IOS...

CVE-2021-27853: Authentication Bypass by Spoofing

Layer 2 network filtering capabilities such as IPv6 RA guard or ARP inspection can be bypassed using combinations of VLAN 0 headers and LLC/SNAP headers...

CVE-2021-27854: Authentication Bypass by Spoofing

Layer 2 network filtering capabilities such as IPv6 RA guard can be bypassed using combinations of VLAN 0 headers, LLC/SNAP headers, and converting frames from Ethernet to Wifi and its reverse...