GSD-2021-28505
Vulnerability from gsd - Updated: 2023-12-13 01:23Details
On affected Arista EOS platforms, if a VXLAN match rule exists in an IPv4 access-list that is applied to the ingress of an L2 or an L3 port/SVI, the VXLAN rule and subsequent ACL rules in that access list will ignore the specified IP protocol.
Aliases
Aliases
{
"GSD": {
"alias": "CVE-2021-28505",
"description": "On affected Arista EOS platforms, if a VXLAN match rule exists in an IPv4 access-list that is applied to the ingress of an L2 or an L3 port/SVI, the VXLAN rule and subsequent ACL rules in that access list will ignore the specified IP protocol.",
"id": "GSD-2021-28505"
},
"gsd": {
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"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
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"id": "GSD-2021-28505",
"modified": "2023-12-13T01:23:29.550349Z",
"schema_version": "1.4.0"
}
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"DATE_PUBLIC": "2022-03-29T21:53:00.000Z",
"ID": "CVE-2021-28505",
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"TITLE": "On affected Arista EOS platforms, if a VXLAN match rule exists in an IPv4 access-list that is applied to the ingress of an L2 or an L3 port/SVI, the VXLAN rule and subsequent ACL rules in that access list will ignore the specified IP protocol."
},
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"version": {
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"version_affected": "\u003c=",
"version_name": "4.26.3M",
"version_value": "4.26.0"
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"version_name": "4.27.0F",
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},
"vendor_name": "Arista Networks"
}
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}
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"value": "On affected Arista EOS platforms, if a VXLAN match rule exists in an IPv4 access-list that is applied to the ingress of an L2 or an L3 port/SVI, the VXLAN rule and subsequent ACL rules in that access list will ignore the specified IP protocol."
}
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"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
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"scope": "UNCHANGED",
"userInteraction": "NONE",
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"name": "https://www.arista.com/en/support/advisories-notices/security-advisories/15267-security-advisory-0073",
"refsource": "MISC",
"url": "https://www.arista.com/en/support/advisories-notices/security-advisories/15267-security-advisory-0073"
}
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},
"solution": [
{
"lang": "eng",
"value": "The recommended resolution is to upgrade to a remediated software version at your earliest convenience.\nArtista recommends customers move to the latest version of each release that contains all the fixes listed below.\n\nCVE-2021-28505 has been fixed in the following releases:\n\n4.26.4M and later releases in the 4.26.x train\n4.27.1F and later releases in the 4.27.x train"
}
],
"source": {
"advisory": "73",
"defect": [
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"609752"
],
"discovery": "INTERNAL"
},
"work_around": [
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"lang": "eng",
"value": "Replace \"vxlan\" IP protocol match with match on IP protocol \"udp\" and Layer 4 destination port for VxLAN encapsulated packets i.e 4789. \u003c br/\u003e If VXLAN L4 destination port number is not the default 4789 then use the configured L4 destination port number."
}
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"lastModifiedDate": "2022-04-26T17:09Z",
"publishedDate": "2022-04-14T21:15Z"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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