CVE-2021-28510 (GCVE-0-2021-28510)

Vulnerability from cvelistv5 – Published: 2023-01-24 00:00 – Updated: 2025-04-01 18:44
VLAI?
Summary
For certain systems running EOS, a Precision Time Protocol (PTP) packet of a management/signaling message with an invalid Type-Length-Value (TLV) causes the PTP agent to restart. Repeated restarts of the service will make the service unavailable.
Severity ?
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CWE
  • CWE-400 - Uncontrolled Resource Consumption
Assigner
References
Impacted products
Vendor Product Version
Arista Networks EOS Affected: 4.22
Affected: 4.27.1 , ≤ 4.27.0 (custom)
Affected: 4.26.4 , ≤ 4.26.0 (custom)
Affected: 4.25.6 , ≤ 4.25.0 (custom)
Affected: 4.24.8 , ≤ 4.24.0 (custom)
Affected: 4.23.10 , ≤ 4.23.0 (custom)
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      "descriptions": "[{\"lang\": \"en\", \"value\": \"For certain systems running EOS, a Precision Time Protocol (PTP) packet of a management/signaling message with an invalid Type-Length-Value (TLV) causes the PTP agent to restart. Repeated restarts of the service will make the service unavailable.\"}, {\"lang\": \"es\", \"value\": \"Para ciertos sistemas que ejecutan EOS, un paquete de protocolo de tiempo de precisi\\u00f3n (PTP) de un mensaje de administraci\\u00f3n/se\\u00f1alizaci\\u00f3n con un valor de tipo, longitud y valor (TLV) no v\\u00e1lido hace que el agente PTP se reinicie. Los reinicios repetidos del servicio har\\u00e1n que el servicio no est\\u00e9 disponible.\"}]",
      "id": "CVE-2021-28510",
      "lastModified": "2024-11-21T05:59:48.603",
      "metrics": "{\"cvssMetricV31\": [{\"source\": \"psirt@arista.com\", \"type\": \"Secondary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L\", \"baseScore\": 5.3, \"baseSeverity\": \"MEDIUM\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"LOW\"}, \"exploitabilityScore\": 3.9, \"impactScore\": 1.4}, {\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\", \"baseScore\": 7.5, \"baseSeverity\": \"HIGH\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 3.9, \"impactScore\": 3.6}]}",
      "published": "2023-01-26T21:15:22.147",
      "references": "[{\"url\": \"https://www.arista.com/en/support/advisories-notices/security-advisory/15439-security-advisory-0076\", \"source\": \"psirt@arista.com\", \"tags\": [\"Exploit\", \"Mitigation\", \"Vendor Advisory\"]}, {\"url\": \"https://www.arista.com/en/support/advisories-notices/security-advisory/15439-security-advisory-0076\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Exploit\", \"Mitigation\", \"Vendor Advisory\"]}]",
      "sourceIdentifier": "psirt@arista.com",
      "vulnStatus": "Modified",
      "weaknesses": "[{\"source\": \"psirt@arista.com\", \"type\": \"Secondary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-400\"}]}, {\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-1284\"}]}]"
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    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://www.arista.com/en/support/advisories-notices/security-advisory/15439-security-advisory-0076\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-03T21:47:32.671Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-28510\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-04-01T18:44:12.691655Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-04-01T18:44:16.801Z\"}}], \"cna\": {\"title\": \"For certain systems running EOS, a Precision Time Protocol (PTP) packet of a management/signaling message with an invalid Type-Length-Value (TLV) causes the PTP agent to restart. Repeated restarts of the service will make the service unavailable.\", \"source\": {\"defect\": [\"BUG\", \"638107\"], \"advisory\": \"76\", \"discovery\": \"INTERNAL\"}, \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 5.3, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"LOW\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}], \"affected\": [{\"vendor\": \"Arista Networks\", \"product\": \"EOS\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.22\"}, {\"status\": \"affected\", \"version\": \"4.27.1\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"4.27.0\"}, {\"status\": \"affected\", \"version\": \"4.26.4\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"4.26.0\"}, {\"status\": \"affected\", \"version\": \"4.25.6\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"4.25.0\"}, {\"status\": \"affected\", \"version\": \"4.24.8\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"4.24.0\"}, {\"status\": \"affected\", \"version\": \"4.23.10\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"4.23.0\"}]}], \"solutions\": [{\"lang\": \"en\", \"value\": \"The recommended resolution is to upgrade to a remediated software version at your earliest convenience. Artista recommends customers move to the latest version of each release that contains all the fixes listed below.\\n\\nCVE-2021-28510 has been fixed in the following releases:\\n4.27.2 and later releases in the 4.27.x train\\n4.26.5 and later releases in the 4.26.x train\\n4.25.7 and later releases in the 4.25.x train\\n4.24.9 and later releases in the 4.24.x train\\n4.23.11 and later releases in the 4.23.x train\\n\"}, {\"lang\": \"en\", \"value\": \"Hotfix\\n\\nThe following hotfix can be applied to remediate CVE-2021-28510\\nNote: Installing/uninstalling the SWIX will cause the PTP agent to restart.\\n\\nVersion: 1.0\\nURL:SecurityAdvisory76_CVE-2021-28510_Hotfix.swix\\n\\nSWIX hash: (SHA-512)2b78b8274b7c73083775b0327e13819c655db07e22b80038bb3843002c679a798b53a4638c549a86183e01a835377bf262d27e60020a39516a5d215e2fadb437 \"}], \"datePublic\": \"2022-04-19T00:00:00.000Z\", \"references\": [{\"url\": \"https://www.arista.com/en/support/advisories-notices/security-advisory/15439-security-advisory-0076\"}], \"workarounds\": [{\"lang\": \"en\", \"value\": \"Install ACL rules to drop PTP packets from untrusted sources. Best practice is to block access to untrusted (non-management) networks.\"}], \"x_generator\": {\"engine\": \"Vulnogram 0.0.9\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"For certain systems running EOS, a Precision Time Protocol (PTP) packet of a management/signaling message with an invalid Type-Length-Value (TLV) causes the PTP agent to restart. Repeated restarts of the service will make the service unavailable.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-400\", \"description\": \"CWE-400 Uncontrolled Resource Consumption\"}]}], \"providerMetadata\": {\"orgId\": \"c8b34d1a-69ae-45c3-88fe-f3b3d44f39b7\", \"shortName\": \"Arista\", \"dateUpdated\": \"2023-01-24T00:00:00.000Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-28510\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-04-01T18:44:26.214Z\", \"dateReserved\": \"2021-03-16T00:00:00.000Z\", \"assignerOrgId\": \"c8b34d1a-69ae-45c3-88fe-f3b3d44f39b7\", \"datePublished\": \"2023-01-24T00:00:00.000Z\", \"assignerShortName\": \"Arista\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Sightings

Author Source Type Date

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.



Detection rules are retrieved from Rulezet.