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2 vulnerabilities found for draft-ietf-v6ops-ra-guard-08 by IETF
CVE-2021-27862 (GCVE-0-2021-27862)
Vulnerability from nvd
Published
2022-09-27 18:40
Modified
2025-11-04 19:12
Severity ?
VLAI Severity ?
EPSS score ?
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).
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| IEEE | 802.2 |
Version: 802.2h-1997 < |
|||||||
|
|||||||||
{
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"dateUpdated": "2025-11-04T19:12:28.789Z",
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"references": [
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"url": "https://datatracker.ietf.org/doc/draft-ietf-v6ops-ra-guard/08/"
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{
"tags": [
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"url": "https://standards.ieee.org/ieee/802.2/1048/"
},
{
"tags": [
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"url": "https://kb.cert.org/vuls/id/855201"
},
{
"tags": [
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"url": "https://blog.champtar.fr/VLAN0_LLC_SNAP/"
},
{
"url": "https://www.kb.cert.org/vuls/id/855201"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
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"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "ADJACENT_NETWORK",
"availabilityImpact": "NONE",
"baseScore": 4.7,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2021-27862",
"options": [
{
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},
{
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},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-05-21T15:04:33.466068Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2025-05-21T15:04:40.862Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "802.2",
"vendor": "IEEE",
"versions": [
{
"lessThanOrEqual": "802.2h-1997",
"status": "affected",
"version": "802.2h-1997",
"versionType": "custom"
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]
},
{
"product": "draft-ietf-v6ops-ra-guard-08",
"vendor": "IETF",
"versions": [
{
"lessThanOrEqual": "08",
"status": "affected",
"version": "08",
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}
]
}
],
"credits": [
{
"lang": "en",
"value": "Etienne Champetier (@champtar) \u003cchampetier.etienne@gmail.com\u003e"
}
],
"datePublic": "2022-09-27T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "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)."
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-130",
"description": "CWE-130 Improper Handling of Length Parameter",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-290",
"description": "CWE-290: Authentication Bypass by Spoofing",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2022-10-12T00:00:00.000Z",
"orgId": "37e5125f-f79b-445b-8fad-9564f167944b",
"shortName": "certcc"
},
"references": [
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},
{
"url": "https://standards.ieee.org/ieee/802.2/1048/"
},
{
"url": "https://kb.cert.org/vuls/id/855201"
},
{
"url": "https://blog.champtar.fr/VLAN0_LLC_SNAP/"
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "L2 network filtering bypass using stacked VLAN0 and LLC/SNAP headers with an invalid length during Ethernet to Wifi frame translation"
}
},
"cveMetadata": {
"assignerOrgId": "37e5125f-f79b-445b-8fad-9564f167944b",
"assignerShortName": "certcc",
"cveId": "CVE-2021-27862",
"datePublished": "2022-09-27T18:40:14.712Z",
"dateReserved": "2021-03-01T00:00:00.000Z",
"dateUpdated": "2025-11-04T19:12:28.789Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2021-27862 (GCVE-0-2021-27862)
Vulnerability from cvelistv5
Published
2022-09-27 18:40
Modified
2025-11-04 19:12
Severity ?
VLAI Severity ?
EPSS score ?
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).
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| IEEE | 802.2 |
Version: 802.2h-1997 < |
|||||||
|
|||||||||
{
"containers": {
"adp": [
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"providerMetadata": {
"dateUpdated": "2025-11-04T19:12:28.789Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
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"references": [
{
"tags": [
"x_transferred"
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"url": "https://datatracker.ietf.org/doc/draft-ietf-v6ops-ra-guard/08/"
},
{
"tags": [
"x_transferred"
],
"url": "https://standards.ieee.org/ieee/802.2/1048/"
},
{
"tags": [
"x_transferred"
],
"url": "https://kb.cert.org/vuls/id/855201"
},
{
"tags": [
"x_transferred"
],
"url": "https://blog.champtar.fr/VLAN0_LLC_SNAP/"
},
{
"url": "https://www.kb.cert.org/vuls/id/855201"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "ADJACENT_NETWORK",
"availabilityImpact": "NONE",
"baseScore": 4.7,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N",
"version": "3.1"
}
},
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"id": "CVE-2021-27862",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-05-21T15:04:33.466068Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2025-05-21T15:04:40.862Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "802.2",
"vendor": "IEEE",
"versions": [
{
"lessThanOrEqual": "802.2h-1997",
"status": "affected",
"version": "802.2h-1997",
"versionType": "custom"
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]
},
{
"product": "draft-ietf-v6ops-ra-guard-08",
"vendor": "IETF",
"versions": [
{
"lessThanOrEqual": "08",
"status": "affected",
"version": "08",
"versionType": "custom"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "Etienne Champetier (@champtar) \u003cchampetier.etienne@gmail.com\u003e"
}
],
"datePublic": "2022-09-27T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "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)."
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-130",
"description": "CWE-130 Improper Handling of Length Parameter",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-290",
"description": "CWE-290: Authentication Bypass by Spoofing",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2022-10-12T00:00:00.000Z",
"orgId": "37e5125f-f79b-445b-8fad-9564f167944b",
"shortName": "certcc"
},
"references": [
{
"url": "https://datatracker.ietf.org/doc/draft-ietf-v6ops-ra-guard/08/"
},
{
"url": "https://standards.ieee.org/ieee/802.2/1048/"
},
{
"url": "https://kb.cert.org/vuls/id/855201"
},
{
"url": "https://blog.champtar.fr/VLAN0_LLC_SNAP/"
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "L2 network filtering bypass using stacked VLAN0 and LLC/SNAP headers with an invalid length during Ethernet to Wifi frame translation"
}
},
"cveMetadata": {
"assignerOrgId": "37e5125f-f79b-445b-8fad-9564f167944b",
"assignerShortName": "certcc",
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