{"containers": {"cna": {"affected": [{"product": "Cisco IOS XR Software", "vendor": "Cisco", "versions": [{"status": "affected", "version": "n/a"}]}], "datePublic": "2020-08-29T00:00:00.000Z", "descriptions": [{"lang": "en", "value": "A vulnerability in the Distance Vector Multicast Routing Protocol (DVMRP) feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to exhaust process memory of an affected device. The vulnerability is due to insufficient queue management for Internet Group Management Protocol (IGMP) packets. An attacker could exploit this vulnerability by sending crafted IGMP traffic to an affected device. A successful exploit could allow the attacker to cause memory exhaustion, resulting in instability of other processes. These processes may include, but are not limited to, interior and exterior routing protocols. Cisco will release software updates that address this vulnerability."}], "exploits": [{"lang": "en", "value": "On August 28, 2020, the Cisco Product Security Incident Response Team (PSIRT) became aware of attempted exploitation of this vulnerability in the wild. For affected products, Cisco recommends implementing a mitigation that is appropriate for the customer\u2019s environment."}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.6, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H", "version": "3.1"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-400", "description": "CWE-400", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2020-08-29T15:15:13.000Z", "orgId": "d1c1063e-7a18-46af-9102-31f8928bc633", "shortName": "cisco"}, "references": [{"name": "20200829 Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability", "tags": ["vendor-advisory", "x_refsource_CISCO"], "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-dvmrp-memexh-dSmpdvfz"}], "source": {"advisory": "cisco-sa-iosxr-dvmrp-memexh-dSmpdvfz", "defect": [["CSCvv54838"]], "discovery": "INTERNAL"}, "title": "Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability", "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "psirt@cisco.com", "DATE_PUBLIC": "2020-08-29T03:00:00", "ID": "CVE-2020-3566", "STATE": "PUBLIC", "TITLE": "Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "Cisco IOS XR Software", "version": {"version_data": [{"version_value": "n/a"}]}}]}, "vendor_name": "Cisco"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "A vulnerability in the Distance Vector Multicast Routing Protocol (DVMRP) feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to exhaust process memory of an affected device. The vulnerability is due to insufficient queue management for Internet Group Management Protocol (IGMP) packets. An attacker could exploit this vulnerability by sending crafted IGMP traffic to an affected device. A successful exploit could allow the attacker to cause memory exhaustion, resulting in instability of other processes. These processes may include, but are not limited to, interior and exterior routing protocols. Cisco will release software updates that address this vulnerability."}]}, "exploit": [{"lang": "en", "value": "On August 28, 2020, the Cisco Product Security Incident Response Team (PSIRT) became aware of attempted exploitation of this vulnerability in the wild. For affected products, Cisco recommends implementing a mitigation that is appropriate for the customer\u2019s environment."}], "impact": {"cvss": {"baseScore": "8.6", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H", "version": "3.0"}}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-400"}]}]}, "references": {"reference_data": [{"name": "20200829 Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability", "refsource": "CISCO", "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-dvmrp-memexh-dSmpdvfz"}]}, "source": {"advisory": "cisco-sa-iosxr-dvmrp-memexh-dSmpdvfz", "defect": [["CSCvv54838"]], "discovery": "INTERNAL"}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T07:37:55.511Z"}, "title": "CVE Program Container", "references": [{"name": "20200829 Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability", "tags": ["vendor-advisory", "x_refsource_CISCO", "x_transferred"], "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-dvmrp-memexh-dSmpdvfz"}]}, {"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2020-3566", "role": "CISA Coordinator", "options": [{"Exploitation": "active"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-11-08T16:09:11.203941Z"}}}, {"other": {"type": "kev", "content": {"dateAdded": "2021-11-03", "reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-3566"}}}], "references": [{"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-3566", "tags": ["government-resource"]}], "timeline": [{"time": "2021-11-03T00:00:00.000Z", "lang": "en", "value": "CVE-2020-3566 added to CISA KEV"}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-10-21T23:35:37.484Z"}}]}, "cveMetadata": {"assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633", "assignerShortName": "cisco", "cveId": "CVE-2020-3566", "datePublished": "2020-08-29T15:15:13.627Z", "dateReserved": "2019-12-12T00:00:00.000Z", "dateUpdated": "2025-10-21T23:35:37.484Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-dvmrp-memexh-dSmpdvfz", "name": "20200829 Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability", "tags": ["vendor-advisory", "x_refsource_CISCO", "x_transferred"]}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T07:37:55.511Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2020-3566", "role": "CISA Coordinator", "options": [{"Exploitation": "active"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-11-08T16:09:11.203941Z"}}}, {"other": {"type": "kev", "content": {"dateAdded": "2021-11-03", "reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-3566"}}}], "timeline": [{"lang": "en", "time": "2021-11-03T00:00:00.000Z", "value": "CVE-2020-3566 added to CISA KEV"}], "references": [{"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-3566", "tags": ["government-resource"]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-11-08T16:09:23.070Z"}}], "cna": {"title": "Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability", "source": {"defect": [["CSCvv54838"]], "advisory": "cisco-sa-iosxr-dvmrp-memexh-dSmpdvfz", "discovery": "INTERNAL"}, "metrics": [{"cvssV3_1": {"scope": "CHANGED", "version": "3.1", "baseScore": 8.6, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}}], "affected": [{"vendor": "Cisco", "product": "Cisco IOS XR Software", "versions": [{"status": "affected", "version": "n/a"}]}], "exploits": [{"lang": "en", "value": "On August 28, 2020, the Cisco Product Security Incident Response Team (PSIRT) became aware of attempted exploitation of this vulnerability in the wild. For affected products, Cisco recommends implementing a mitigation that is appropriate for the customer\u2019s environment."}], "datePublic": "2020-08-29T00:00:00.000Z", "references": [{"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-dvmrp-memexh-dSmpdvfz", "name": "20200829 Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability", "tags": ["vendor-advisory", "x_refsource_CISCO"]}], "descriptions": [{"lang": "en", "value": "A vulnerability in the Distance Vector Multicast Routing Protocol (DVMRP) feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to exhaust process memory of an affected device. The vulnerability is due to insufficient queue management for Internet Group Management Protocol (IGMP) packets. An attacker could exploit this vulnerability by sending crafted IGMP traffic to an affected device. A successful exploit could allow the attacker to cause memory exhaustion, resulting in instability of other processes. These processes may include, but are not limited to, interior and exterior routing protocols. Cisco will release software updates that address this vulnerability."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-400", "description": "CWE-400"}]}], "providerMetadata": {"orgId": "d1c1063e-7a18-46af-9102-31f8928bc633", "shortName": "cisco", "dateUpdated": "2020-08-29T15:15:13.000Z"}, "x_legacyV4Record": {"impact": {"cvss": {"version": "3.0", "baseScore": "8.6", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H"}}, "source": {"defect": [["CSCvv54838"]], "advisory": "cisco-sa-iosxr-dvmrp-memexh-dSmpdvfz", "discovery": "INTERNAL"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"version": {"version_data": [{"version_value": "n/a"}]}, "product_name": "Cisco IOS XR Software"}]}, "vendor_name": "Cisco"}]}}, "exploit": [{"lang": "en", "value": "On August 28, 2020, the Cisco Product Security Incident Response Team (PSIRT) became aware of attempted exploitation of this vulnerability in the wild. For affected products, Cisco recommends implementing a mitigation that is appropriate for the customer\u2019s environment."}], "data_type": "CVE", "references": {"reference_data": [{"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-dvmrp-memexh-dSmpdvfz", "name": "20200829 Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability", "refsource": "CISCO"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "eng", "value": "A vulnerability in the Distance Vector Multicast Routing Protocol (DVMRP) feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to exhaust process memory of an affected device. The vulnerability is due to insufficient queue management for Internet Group Management Protocol (IGMP) packets. An attacker could exploit this vulnerability by sending crafted IGMP traffic to an affected device. A successful exploit could allow the attacker to cause memory exhaustion, resulting in instability of other processes. These processes may include, but are not limited to, interior and exterior routing protocols. Cisco will release software updates that address this vulnerability."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-400"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2020-3566", "STATE": "PUBLIC", "TITLE": "Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability", "ASSIGNER": "psirt@cisco.com", "DATE_PUBLIC": "2020-08-29T03:00:00"}}}}, "cveMetadata": {"cveId": "CVE-2020-3566", "state": "PUBLISHED", "dateUpdated": "2025-10-21T23:35:37.484Z", "dateReserved": "2019-12-12T00:00:00.000Z", "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633", "datePublished": "2020-08-29T15:15:13.627Z", "assignerShortName": "cisco"}, "dataVersion": "5.1"}

{"cisaActionDue": "2022-05-03", "cisaExploitAdd": "2021-11-03", "cisaRequiredAction": "Apply updates per vendor instructions.", "cisaVulnerabilityName": "Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability", "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:cisco:ios_xr:6.4.2:*:*:*:*:*:*:*", "matchCriteriaId": "E67F538A-3E1A-4749-BB8D-4F8043653B6E", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:cisco:asr_9001:-:*:*:*:*:*:*:*", "matchCriteriaId": "324C97E6-1810-404F-9F45-6240F99FF039", "vulnerable": false}, {"criteria": "cpe:2.3:h:cisco:asr_9006:-:*:*:*:*:*:*:*", "matchCriteriaId": "57EB55BB-41B7-40A1-B6F5-142FE8AB4C16", "vulnerable": false}, {"criteria": "cpe:2.3:h:cisco:asr_9010:-:*:*:*:*:*:*:*", "matchCriteriaId": "433F4A82-04A4-4EAA-8C19-F7581DCD8D29", "vulnerable": false}, {"criteria": "cpe:2.3:h:cisco:asr_9901:-:*:*:*:*:*:*:*", "matchCriteriaId": "2D5E60AB-94FF-448A-89D8-5D2197E21C74", "vulnerable": false}, {"criteria": "cpe:2.3:h:cisco:asr_9904:-:*:*:*:*:*:*:*", "matchCriteriaId": "A93212A4-50AB-42E7-89A4-5FBBAEA050C3", "vulnerable": false}, {"criteria": "cpe:2.3:h:cisco:asr_9906:-:*:*:*:*:*:*:*", "matchCriteriaId": "EDA53A61-98B3-458C-8893-61CD7D6B1E48", "vulnerable": false}, {"criteria": "cpe:2.3:h:cisco:asr_9910:-:*:*:*:*:*:*:*", "matchCriteriaId": "F396564E-B477-4A27-A189-CEB737552E25", "vulnerable": false}, {"criteria": "cpe:2.3:h:cisco:asr_9912:-:*:*:*:*:*:*:*", "matchCriteriaId": "5445CC54-ACFB-4070-AF26-F91FEAA85181", "vulnerable": false}, {"criteria": "cpe:2.3:h:cisco:asr_9922:-:*:*:*:*:*:*:*", "matchCriteriaId": "D7AA58E5-D7E1-48CF-93FF-C60EB85B2BC7", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability in the Distance Vector Multicast Routing Protocol (DVMRP) feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to exhaust process memory of an affected device. The vulnerability is due to insufficient queue management for Internet Group Management Protocol (IGMP) packets. An attacker could exploit this vulnerability by sending crafted IGMP traffic to an affected device. A successful exploit could allow the attacker to cause memory exhaustion, resulting in instability of other processes. These processes may include, but are not limited to, interior and exterior routing protocols. Cisco will release software updates that address this vulnerability."}, {"lang": "es", "value": "Una vulnerabilidad en la funcionalidad del Distance Vector Multicast Routing Protocol (DVMRP) de Cisco IOS XR Software, podr\u00eda permitir a un atacante remoto no autenticado agotar la memoria de proceso de un dispositivo afectado. La vulnerabilidad es debido a una gesti\u00f3n de cola insuficiente para los paquetes Internet Group Management Protocol (IGMP). Un atacante podr\u00eda explotar esta vulnerabilidad mediante el env\u00edo de tr\u00e1fico IGMP dise\u00f1ado hacia un dispositivo afectado. Una explotaci\u00f3n con \u00e9xito podr\u00eda permitir a un atacante agotar la memoria, resultando en una inestabilidad de otros procesos. Estos procesos pueden incluir, pero no se limitan a, protocolos de enrutamiento interior y exterior. Cisco lanzar\u00e1 actualizaciones de software que abordan esta vulnerabilidad"}], "id": "CVE-2020-3566", "lastModified": "2025-10-28T13:53:58.107", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 7.8, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 6.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.6, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 4.0, "source": "psirt@cisco.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.6, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 4.0, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2020-08-29T16:15:09.797", "references": [{"source": "psirt@cisco.com", "tags": ["Vendor Advisory"], "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-dvmrp-memexh-dSmpdvfz"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-dvmrp-memexh-dSmpdvfz"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["US Government Resource"], "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-3566"}], "sourceIdentifier": "psirt@cisco.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-400"}], "source": "psirt@cisco.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-770"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{}

{}