EUVD-2021-14600

Malware in sbrugna...

K45012151: Layer 2 security bypass issue CVE-2021-27861, CVE-2021-27862, CVE-2021-27853, CVE-2021-27854

Security Advisory Description CVE-2021-27861 Layer 2 network filtering capabilities such as IPv6 RA guard can be bypassed using LLC/SNAP headers with invalid length and optionally VLAN0 headers CVE-2021-27862 Layer 2 network filtering capabilities such as IPv6 RA guard can be bypassed using...

CVE-2021-27862

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

CVE-2021-27861

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

CVE-2021-27854

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

CVE-2021-27862

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

CVE-2021-27861

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

CVE-2021-27854

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...

Design/Logic Flaw

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...

Design/Logic Flaw

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

Code injection

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

CVE-2021-27862 L2 network filtering bypass using stacked VLAN0 and LLC/SNAP headers with an invalid length during Ethernet to Wifi frame translation

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

CVE-2021-27862 L2 network filtering bypass using stacked VLAN0 and LLC/SNAP headers with an invalid length during Ethernet to Wifi frame translation

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

CVE-2021-27861 L2 network filtering bypass using stacked VLAN0 and LLC/SNAP headers with invalid lengths

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

CVE-2021-27861 L2 network filtering bypass using stacked VLAN0 and LLC/SNAP headers with invalid lengths

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

CVE-2021-27854 L2 network filtering bypass using stacked VLAN0, LLC/SNAP headers, and Ethernet to Wifi frame translation

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...

CVE-2021-27853

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-2021-27853 L2 network filtering can be bypassed using stacked VLAN0 and LLC/SNAP headers

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...

PT-2022-4863 · Cisco · Cisco Ios +1

Name of the Vulnerable Software and Affected Versions: No specific software or versions are mentioned in the provided descriptions. Description: The issue is related to the implementation of the Ethernet encapsulation protocol, specifically concerning the combination of headers. This could allow ...

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...