199 lines
7.4 KiB
JSON
199 lines
7.4 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"state": "PUBLISHED",
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"cveId": "CVE-2021-27854",
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"assignerOrgId": "37e5125f-f79b-445b-8fad-9564f167944b",
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"assignerShortName": "certcc",
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"datePublished": "2022-09-27T18:40:12.738Z",
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"dateUpdated": "2025-11-04T19:12:26.598Z",
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"dateReserved": "2021-03-01T00:00:00.000Z"
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},
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"containers": {
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"cna": {
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"title": "L2 network filtering bypass using stacked VLAN0, LLC/SNAP headers, and Ethernet to Wifi frame translation",
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"datePublic": "2022-09-27T00:00:00.000Z",
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"providerMetadata": {
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"orgId": "37e5125f-f79b-445b-8fad-9564f167944b",
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"shortName": "certcc",
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"dateUpdated": "2022-10-12T00:00:00.000Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "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."
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}
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],
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"affected": [
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{
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"vendor": "IETF",
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"product": "P802.1Q",
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"versions": [
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{
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"version": "D1.0",
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"status": "affected",
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"lessThanOrEqual": "D1.0",
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"versionType": "custom"
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}
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]
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},
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{
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"vendor": "IETF",
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"product": "draft-ietf-v6ops-ra-guard",
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"versions": [
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{
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"version": "08",
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"status": "affected",
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"lessThanOrEqual": "08",
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"versionType": "custom"
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}
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]
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},
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{
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"vendor": "IEEE",
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"product": "802.2",
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"versions": [
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{
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"version": "802.2h-1997",
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"status": "affected",
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"lessThanOrEqual": "802.2h-1997",
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"versionType": "custom"
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}
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]
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}
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],
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"references": [
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{
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"url": "https://datatracker.ietf.org/doc/draft-ietf-v6ops-ra-guard/08/"
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},
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{
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"url": "https://standards.ieee.org/ieee/802.2/1048/"
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},
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{
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"url": "https://standards.ieee.org/ieee/802.1Q/10323/"
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},
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{
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"url": "https://kb.cert.org/vuls/id/855201"
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},
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{
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"url": "https://blog.champtar.fr/VLAN0_LLC_SNAP/"
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}
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],
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"credits": [
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{
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"lang": "en",
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"value": "Etienne Champetier (@champtar) <champetier.etienne@gmail.com>"
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"type": "CWE",
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"lang": "en",
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"description": "CWE-290: Authentication Bypass by Spoofing",
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"cweId": "CWE-290"
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}
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]
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}
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],
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"source": {
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"discovery": "EXTERNAL"
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}
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},
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"adp": [
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{
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"title": "CVE Program Container",
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"references": [
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{
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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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"x_transferred"
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]
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},
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{
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"url": "https://standards.ieee.org/ieee/802.2/1048/",
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"tags": [
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"x_transferred"
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]
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},
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{
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"url": "https://standards.ieee.org/ieee/802.1Q/10323/",
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"tags": [
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"x_transferred"
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]
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},
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{
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"url": "https://kb.cert.org/vuls/id/855201",
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"tags": [
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"x_transferred"
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]
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},
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{
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"url": "https://blog.champtar.fr/VLAN0_LLC_SNAP/",
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"tags": [
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"x_transferred"
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]
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},
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{
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"url": "https://www.kb.cert.org/vuls/id/855201"
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}
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],
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"providerMetadata": {
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"orgId": "af854a3a-2127-422b-91ae-364da2661108",
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"shortName": "CVE",
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"dateUpdated": "2025-11-04T19:12:26.598Z"
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}
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},
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{
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"metrics": [
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{
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"cvssV3_1": {
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"scope": "CHANGED",
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"version": "3.1",
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"baseScore": 4.7,
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"attackVector": "ADJACENT_NETWORK",
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"baseSeverity": "MEDIUM",
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"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N",
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"integrityImpact": "LOW",
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"userInteraction": "NONE",
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"attackComplexity": "LOW",
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"availabilityImpact": "NONE",
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"privilegesRequired": "NONE",
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"confidentialityImpact": "NONE"
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}
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},
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2025-05-21T15:06:23.882465Z",
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"id": "CVE-2021-27854",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2025-05-21T15:06:44.230Z"
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}
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}
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]
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}
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} |