FKIE_CVE-2021-3031
Vulnerability from fkie_nvd - Published: 2021-01-13 18:15 - Updated: 2026-06-17 04:04
Severity
Summary
Padding bytes in Ethernet packets on PA-200, PA-220, PA-500, PA-800, PA-2000 Series, PA-3000 Series, PA-3200 Series, PA-5200 Series, and PA-7000 Series firewalls are not cleared before the data frame is created. This leaks a small amount of random information from the firewall memory into the Ethernet packets. An attacker on the same Ethernet subnet as the PAN-OS firewall is able to collect potentially sensitive information from these packets. This issue is also known as Etherleak and is detected by security scanners as CVE-2003-0001. This issue impacts: PAN-OS 8.1 version earlier than PAN-OS 8.1.18; PAN-OS 9.0 versions earlier than PAN-OS 9.0.12; PAN-OS 9.1 versions earlier than PAN-OS 9.1.5.
References
Impacted products
{
"affected": [
{
"affectedData": [
{
"platforms": [
"PA-200, PA-220, PA-500, PA-800, PA-2000 Series, PA-3000 Series, PA-3200 Series, PA-5200"
],
"product": "PAN-OS",
"vendor": "Palo Alto Networks",
"versions": [
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"status": "affected",
"version": "8.1",
"versionType": "custom"
},
{
"lessThan": "9.0.12",
"status": "affected",
"version": "9.0",
"versionType": "custom"
},
{
"lessThan": "9.1.5",
"status": "affected",
"version": "9.1",
"versionType": "custom"
}
]
},
{
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"vendor": "Palo Alto Networks",
"versions": [
{
"status": "unaffected",
"version": "10.0.*"
},
{
"lessThan": "8.1*",
"status": "unaffected",
"version": "8.1.18",
"versionType": "custom"
},
{
"lessThan": "9.0*",
"status": "unaffected",
"version": "9.0.12",
"versionType": "custom"
},
{
"lessThan": "9.1*",
"status": "unaffected",
"version": "9.1.5",
"versionType": "custom"
}
]
}
],
"source": "psirt@paloaltonetworks.com"
}
],
"configurations": [
{
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],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Padding bytes in Ethernet packets on PA-200, PA-220, PA-500, PA-800, PA-2000 Series, PA-3000 Series, PA-3200 Series, PA-5200 Series, and PA-7000 Series firewalls are not cleared before the data frame is created. This leaks a small amount of random information from the firewall memory into the Ethernet packets. An attacker on the same Ethernet subnet as the PAN-OS firewall is able to collect potentially sensitive information from these packets. This issue is also known as Etherleak and is detected by security scanners as CVE-2003-0001. This issue impacts: PAN-OS 8.1 version earlier than PAN-OS 8.1.18; PAN-OS 9.0 versions earlier than PAN-OS 9.0.12; PAN-OS 9.1 versions earlier than PAN-OS 9.1.5."
},
{
"lang": "es",
"value": "Los bytes de relleno en los paquetes Ethernet en los firewalls PA-200, PA-220, PA-500, PA-800, PA-2000 Series, PA-3000 Series, PA-3200 Series, PA-5200 Series y PA-7000 Series, no son borrados antes de que se cree la trama de datos.\u0026#xa0;Esto filtra una peque\u00f1a cantidad de informaci\u00f3n aleatoria de la memoria del firewall para los paquetes Ethernet.\u0026#xa0;Un atacante en la misma subred Ethernet que el firewall PAN-OS puede recopilar informaci\u00f3n potencialmente confidencial de estos paquetes.\u0026#xa0;Este problema tambi\u00e9n se conoce como Etherleak y los esc\u00e1neres de seguridad lo detectan como CVE-2003-0001.\u0026#xa0;Este problema afecta: PAN-OS 8.1 versiones anteriores a PAN-OS 8.1.18;\u0026#xa0;PAN-OS 9.0 versiones anteriores a PAN-OS 9.0.12;\u0026#xa0;PAN-OS 9.1 versiones anteriores a PAN-OS 9.1.5."
}
],
"id": "CVE-2021-3031",
"lastModified": "2026-06-17T04:04:35.567",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "LOW",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "ADJACENT_NETWORK",
"authentication": "NONE",
"availabilityImpact": "NONE",
"baseScore": 3.3,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "NONE",
"vectorString": "AV:A/AC:L/Au:N/C:P/I:N/A:N",
"version": "2.0"
},
"exploitabilityScore": 6.5,
"impactScore": 2.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
],
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{
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"attackVector": "ADJACENT_NETWORK",
"availabilityImpact": "NONE",
"baseScore": 4.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
"version": "3.1"
},
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"impactScore": 1.4,
"source": "psirt@paloaltonetworks.com",
"type": "Secondary"
}
]
},
"published": "2021-01-13T18:15:14.603",
"references": [
{
"source": "psirt@paloaltonetworks.com",
"tags": [
"Vendor Advisory"
],
"url": "https://security.paloaltonetworks.com/CVE-2021-3031"
},
{
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"url": "https://security.paloaltonetworks.com/CVE-2021-3031"
}
],
"sourceIdentifier": "psirt@paloaltonetworks.com",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-200"
}
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"type": "Secondary"
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"description": [
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"value": "CWE-212"
}
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}
]
}
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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.
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- 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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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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