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9 vulnerabilities found for 802.2 by IEEE
VAR-202209-1859
Vulnerability from variot - Updated: 2023-12-18 13:22Layer 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. Layer-2 (L2) network security controls provided by various devices, such as switches, routers, and operating systems, can be bypassed by stacking Ethernet protocol headers. An attacker can send crafted packets through vulnerable devices to cause Denial-of-service (DoS) or to perform a man-in-the-middle (MitM) attack against a target network.CVE-2021-27853 Affected CVE-2021-27854 Affected CVE-2021-27861 Affected CVE-2021-27862 AffectedCVE-2021-27853 Affected CVE-2021-27854 Affected CVE-2021-27861 Affected CVE-2021-27862 Affected. IEEE of ieee 802.2 Products from multiple other vendors contain vulnerabilities related to authentication bypass through spoofing.Information may be tampered with
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CVE-2021-27862 (GCVE-0-2021-27862)
Vulnerability from cvelistv5 – Published: 2022-09-27 18:40 – Updated: 2025-11-04 19:12
VLAI
Title
L2 network filtering bypass using stacked VLAN0 and LLC/SNAP headers with an invalid length during Ethernet to Wifi frame translation
Summary
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).
Severity
4.7 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| IEEE | 802.2 |
Affected:
802.2h-1997 , ≤ 802.2h-1997
(custom)
|
|
| IETF | draft-ietf-v6ops-ra-guard-08 |
Affected:
08 , ≤ 08
(custom)
|
Date Public
2022-09-27 00:00
Credits
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CVE-2021-27861 (GCVE-0-2021-27861)
Vulnerability from cvelistv5 – Published: 2022-09-27 18:40 – Updated: 2025-11-04 19:12
VLAI
Title
L2 network filtering bypass using stacked VLAN0 and LLC/SNAP headers with invalid lengths
Summary
Layer 2 network filtering capabilities such as IPv6 RA guard can be bypassed using LLC/SNAP headers with invalid length (and optionally VLAN0 headers)
Severity
4.7 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
Impacted products
Date Public
2022-09-27 00:00
Credits
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CVE-2021-27854 (GCVE-0-2021-27854)
Vulnerability from cvelistv5 – Published: 2022-09-27 18:40 – Updated: 2025-11-04 19:12
VLAI
Title
L2 network filtering bypass using stacked VLAN0, LLC/SNAP headers, and Ethernet to Wifi frame translation
Summary
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.
Severity
4.7 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-290 - Authentication Bypass by Spoofing
Assigner
References
Impacted products
Date Public
2022-09-27 00:00
Credits
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CVE-2021-27853 (GCVE-0-2021-27853)
Vulnerability from cvelistv5 – Published: 2022-09-27 17:55 – Updated: 2025-11-04 19:12
VLAI
Title
L2 network filtering can be bypassed using stacked VLAN0 and LLC/SNAP headers
Summary
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.
Severity
4.7 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-290 - Authentication Bypass by Spoofing
Assigner
References
7 references
Impacted products
Date Public
2022-09-27 00:00
Credits
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CVE-2021-27862 (GCVE-0-2021-27862)
Vulnerability from nvd – Published: 2022-09-27 18:40 – Updated: 2025-11-04 19:12
VLAI
Title
L2 network filtering bypass using stacked VLAN0 and LLC/SNAP headers with an invalid length during Ethernet to Wifi frame translation
Summary
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).
Severity
4.7 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| IEEE | 802.2 |
Affected:
802.2h-1997 , ≤ 802.2h-1997
(custom)
|
|
| IETF | draft-ietf-v6ops-ra-guard-08 |
Affected:
08 , ≤ 08
(custom)
|
Date Public
2022-09-27 00:00
Credits
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CVE-2021-27861 (GCVE-0-2021-27861)
Vulnerability from nvd – Published: 2022-09-27 18:40 – Updated: 2025-11-04 19:12
VLAI
Title
L2 network filtering bypass using stacked VLAN0 and LLC/SNAP headers with invalid lengths
Summary
Layer 2 network filtering capabilities such as IPv6 RA guard can be bypassed using LLC/SNAP headers with invalid length (and optionally VLAN0 headers)
Severity
4.7 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
Impacted products
Date Public
2022-09-27 00:00
Credits
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CVE-2021-27854 (GCVE-0-2021-27854)
Vulnerability from nvd – Published: 2022-09-27 18:40 – Updated: 2025-11-04 19:12
VLAI
Title
L2 network filtering bypass using stacked VLAN0, LLC/SNAP headers, and Ethernet to Wifi frame translation
Summary
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.
Severity
4.7 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-290 - Authentication Bypass by Spoofing
Assigner
References
Impacted products
Date Public
2022-09-27 00:00
Credits
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CVE-2021-27853 (GCVE-0-2021-27853)
Vulnerability from nvd – Published: 2022-09-27 17:55 – Updated: 2025-11-04 19:12
VLAI
Title
L2 network filtering can be bypassed using stacked VLAN0 and LLC/SNAP headers
Summary
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.
Severity
4.7 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-290 - Authentication Bypass by Spoofing
Assigner
References
7 references
Impacted products
Date Public
2022-09-27 00:00
Credits
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