CVE-2020-1999

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This technique evades signature-based threat detection. This issue impacts: PAN-OS 8.1 versions earlier than 8.1.17; PAN-OS 9.0 versions earlier than 9.0.11; PAN-OS 9.1 versions earlier than 9.1.5; All versions of PAN-OS 7.1 and PAN-OS 8.0."}], "exploits": [{"lang": "en", "value": "Palo Alto Networks is not aware of any malicious exploitation of this issue."}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "version": "3.1"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-754", "description": "CWE-754 Improper Check for Unusual or Exceptional Conditions", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2020-11-12T00:05:19.000Z", "orgId": "d6c1279f-00f6-4ef7-9217-f89ffe703ec0", "shortName": "palo_alto"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://security.paloaltonetworks.com/CVE-2020-1999"}], "solutions": [{"lang": "en", "value": "This issue is fixed in PAN-OS 8.1.17, PAN-OS 9.0.11, PAN-OS 9.1.5, and all later PAN-OS versions."}], "source": {"defect": ["PAN-145133"], "discovery": "INTERNAL"}, "timeline": [{"lang": "en", "time": "2020-11-11T00:00:00.000Z", "value": "Initial publication"}], "title": "PAN-OS: Threat signatures are evaded by specifically crafted packets", "workarounds": [{"lang": "en", "value": "There are no known workarounds for this issue."}], "x_generator": {"engine": "Vulnogram 0.0.9"}, "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "psirt@paloaltonetworks.com", "DATE_PUBLIC": "2020-11-11T17:00:00.000Z", "ID": "CVE-2020-1999", "STATE": "PUBLIC", "TITLE": "PAN-OS: Threat signatures are evaded by specifically crafted packets"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "PAN-OS", "version": {"version_data": [{"version_affected": "<", "version_name": "8.1", "version_value": "8.1.17"}, {"version_affected": "<", "version_name": "9.0", "version_value": "9.0.11"}, {"version_affected": "<", "version_name": "9.1", "version_value": "9.1.5"}, {"version_affected": "!>=", "version_name": "8.1", "version_value": "8.1.17"}, {"version_affected": "!>=", "version_name": "9.0", "version_value": "9.0.11"}, {"version_affected": "!>=", "version_name": "9.1", "version_value": "9.1.5"}, {"version_affected": "=", "version_name": "7.1", "version_value": "7.1.*"}, {"version_affected": "=", "version_name": "8.0", "version_value": "8.0.*"}, {"version_affected": "!", "version_name": "10.0", "version_value": "10.0.*"}]}}]}, "vendor_name": "Palo Alto Networks"}]}}, "credit": [{"lang": "eng", "value": "This issue was found by Vijay Prakash of Palo Alto Networks during internal security review."}], "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "A vulnerability exists in the Palo Alto Network PAN-OS signature-based threat detection engine that allows an attacker to communicate with devices in the network in a way that is not analyzed for threats by sending data through specifically crafted TCP packets. This technique evades signature-based threat detection. This issue impacts: PAN-OS 8.1 versions earlier than 8.1.17; PAN-OS 9.0 versions earlier than 9.0.11; PAN-OS 9.1 versions earlier than 9.1.5; All versions of PAN-OS 7.1 and PAN-OS 8.0."}]}, "exploit": [{"lang": "en", "value": "Palo Alto Networks is not aware of any malicious exploitation of this issue."}], "generator": {"engine": "Vulnogram 0.0.9"}, "impact": {"cvss": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "version": "3.1"}}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-754 Improper Check for Unusual or Exceptional Conditions"}]}]}, "references": {"reference_data": [{"name": "https://security.paloaltonetworks.com/CVE-2020-1999", "refsource": "MISC", "url": "https://security.paloaltonetworks.com/CVE-2020-1999"}]}, "solution": [{"lang": "en", "value": "This issue is fixed in PAN-OS 8.1.17, PAN-OS 9.0.11, PAN-OS 9.1.5, and all later PAN-OS versions."}], "source": {"defect": ["PAN-145133"], "discovery": "INTERNAL"}, "timeline": [{"lang": "en", "time": "2020-11-11T00:00:00.000Z", "value": "Initial publication"}], "work_around": [{"lang": "en", "value": "There are no known workarounds for this issue."}], "x_advisoryEoL": false, "x_affectedList": ["PAN-OS 9.1.4", "PAN-OS 9.1.3-h1", "PAN-OS 9.1.3", "PAN-OS 9.1.2-h1", "PAN-OS 9.1.2", "PAN-OS 9.1.1", "PAN-OS 9.1.0-h3", "PAN-OS 9.1.0-h2", "PAN-OS 9.1.0-h1", "PAN-OS 9.1.0", "PAN-OS 9.1", "PAN-OS 9.0.10", "PAN-OS 9.0.9-h1", "PAN-OS 9.0.9", "PAN-OS 9.0.8", "PAN-OS 9.0.7", "PAN-OS 9.0.6", "PAN-OS 9.0.5", "PAN-OS 9.0.4", "PAN-OS 9.0.3-h3", "PAN-OS 9.0.3-h2", "PAN-OS 9.0.3-h1", "PAN-OS 9.0.3", "PAN-OS 9.0.2-h4", "PAN-OS 9.0.2-h3", "PAN-OS 9.0.2-h2", "PAN-OS 9.0.2-h1", "PAN-OS 9.0.2", "PAN-OS 9.0.1", "PAN-OS 9.0.0", "PAN-OS 9.0", "PAN-OS 8.1.16", "PAN-OS 8.1.15-h3", "PAN-OS 8.1.15-h2", "PAN-OS 8.1.15-h1", "PAN-OS 8.1.15", "PAN-OS 8.1.14-h2", "PAN-OS 8.1.14-h1", "PAN-OS 8.1.14", "PAN-OS 8.1.13", "PAN-OS 8.1.12", "PAN-OS 8.1.11", "PAN-OS 8.1.10", "PAN-OS 8.1.9-h4", "PAN-OS 8.1.9-h3", "PAN-OS 8.1.9-h2", "PAN-OS 8.1.9-h1", "PAN-OS 8.1.9", "PAN-OS 8.1.8-h5", "PAN-OS 8.1.8-h4", "PAN-OS 8.1.8-h3", "PAN-OS 8.1.8-h2", "PAN-OS 8.1.8-h1", "PAN-OS 8.1.8", "PAN-OS 8.1.7", "PAN-OS 8.1.6-h2", "PAN-OS 8.1.6-h1", "PAN-OS 8.1.6", "PAN-OS 8.1.5", "PAN-OS 8.1.4", "PAN-OS 8.1.3", "PAN-OS 8.1.2", "PAN-OS 8.1.1", "PAN-OS 8.1.0", "PAN-OS 8.1", "PAN-OS 8.0.20", "PAN-OS 8.0.19-h1", "PAN-OS 8.0.19", "PAN-OS 8.0.18", "PAN-OS 8.0.17", "PAN-OS 8.0.16", "PAN-OS 8.0.15", "PAN-OS 8.0.14", "PAN-OS 8.0.13", "PAN-OS 8.0.12", "PAN-OS 8.0.11-h1", "PAN-OS 8.0.10", "PAN-OS 8.0.9", "PAN-OS 8.0.8", "PAN-OS 8.0.7", "PAN-OS 8.0.6-h3", "PAN-OS 8.0.6-h2", "PAN-OS 8.0.6-h1", "PAN-OS 8.0.6", "PAN-OS 8.0.5", "PAN-OS 8.0.4", "PAN-OS 8.0.3-h4", "PAN-OS 8.0.3-h3", "PAN-OS 8.0.3-h2", "PAN-OS 8.0.3-h1", "PAN-OS 8.0.3", "PAN-OS 8.0.2", "PAN-OS 8.0.1", "PAN-OS 8.0.0", "PAN-OS 8.0", "PAN-OS 7.1.26", "PAN-OS 7.1.25", "PAN-OS 7.1.24-h1", "PAN-OS 7.1.24", "PAN-OS 7.1.23", "PAN-OS 7.1.22", "PAN-OS 7.1.21", "PAN-OS 7.1.20", "PAN-OS 7.1.19", "PAN-OS 7.1.18", "PAN-OS 7.1.17", "PAN-OS 7.1.16", "PAN-OS 7.1.15", "PAN-OS 7.1.14", "PAN-OS 7.1.13", "PAN-OS 7.1.12", "PAN-OS 7.1.11", "PAN-OS 7.1.10", "PAN-OS 7.1.9-h4", "PAN-OS 7.1.9-h3", "PAN-OS 7.1.9-h2", "PAN-OS 7.1.9-h1", "PAN-OS 7.1.9", "PAN-OS 7.1.8", "PAN-OS 7.1.7", "PAN-OS 7.1.6", "PAN-OS 7.1.5", "PAN-OS 7.1.4-h2", "PAN-OS 7.1.4-h1", "PAN-OS 7.1.4", "PAN-OS 7.1.3", "PAN-OS 7.1.2", "PAN-OS 7.1.1", "PAN-OS 7.1.0", "PAN-OS 7.1"]}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T06:54:00.597Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://security.paloaltonetworks.com/CVE-2020-1999"}]}]}, "cveMetadata": {"assignerOrgId": "d6c1279f-00f6-4ef7-9217-f89ffe703ec0", "assignerShortName": "palo_alto", "cveId": "CVE-2020-1999", "datePublished": "2020-11-12T00:05:19.633Z", "dateReserved": "2019-12-04T00:00:00.000Z", "dateUpdated": "2024-09-17T01:15:53.377Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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This technique evades signature-based threat detection. This issue impacts: PAN-OS 8.1 versions earlier than 8.1.17; PAN-OS 9.0 versions earlier than 9.0.11; PAN-OS 9.1 versions earlier than 9.1.5; All versions of PAN-OS 7.1 and PAN-OS 8.0."}, {"lang": "es", "value": "Se presenta una vulnerabilidad en el motor de detecci\u00f3n de amenazas basado en firmas de PAN-OS de Palo Alto Network que permite a un atacante comunicarse con dispositivos en la red de una manera que no se analiza en busca de amenazas mediante el env\u00edo de datos mediante paquetes TCP espec\u00edficamente dise\u00f1ados.&#xa0;Esta t\u00e9cnica evade la detecci\u00f3n de amenazas basada en firmas.&#xa0;Este problema afecta a: PAN-OS versiones 8.1 anteriores a 8.1.17;&#xa0;PAN-OS versiones 9.0 anteriores a 9.0.11;&#xa0;PAN-OS versiones 9.1 anteriores a 9.1.5;&#xa0;Todas las versiones de PAN-OS 7.1 y PAN-OS 8.0"}], "id": "CVE-2020-1999", "lastModified": "2026-06-17T03:02:48.180", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 5.0, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "psirt@paloaltonetworks.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2020-11-12T00:15:10.253", "references": [{"source": "psirt@paloaltonetworks.com", "tags": ["Vendor Advisory"], "url": "https://security.paloaltonetworks.com/CVE-2020-1999"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://security.paloaltonetworks.com/CVE-2020-1999"}], "sourceIdentifier": "psirt@paloaltonetworks.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-754"}], "source": "psirt@paloaltonetworks.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-754"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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