cve-2019-1918
Vulnerability from cvelistv5
Published
2019-08-07 21:10
Modified
2024-11-21 19:18
Severity ?
EPSS score ?
Summary
Cisco IOS XR Software Intermediate System–to–Intermediate System Denial of Service Vulnerability
References
Impacted products
Vendor | Product | Version | |
---|---|---|---|
▼ | Cisco | Cisco IOS XR Software |
Version: unspecified < n/a |
|
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The vulnerability is due to incorrect processing of IS\u0026ndash;IS link-state protocol data units (PDUs). An attacker could exploit this vulnerability by sending specific link-state PDUs to an affected system to be processed. A successful exploit could allow the attacker to cause incorrect calculations used in the weighted remote shared risk link groups (SRLG) or in the IGP Flexible Algorithm. It could also cause tracebacks to the logs or potentially cause the receiving device to crash the IS\u0026ndash;IS process, resulting in a DoS condition." } ], "exploits": [ { "lang": "en", "value": "The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory." } ], "metrics": [ { "cvssV3_0": { "attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.4, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H", "version": "3.0" } } ], "problemTypes": [ { "descriptions": [ { "cweId": "CWE-20", "description": "CWE-20", "lang": "en", "type": "CWE" } ] } ], "providerMetadata": { "dateUpdated": "2019-08-07T21:10:21", "orgId": "d1c1063e-7a18-46af-9102-31f8928bc633", "shortName": "cisco" }, "references": [ { "name": "20190807 Cisco IOS XR Software Intermediate System\u2013to\u2013Intermediate System Denial of Service Vulnerability", "tags": [ "vendor-advisory", "x_refsource_CISCO" ], "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190807-iosxr-isis-dos-1918" } ], "source": { "advisory": "cisco-sa-20190807-iosxr-isis-dos-1918", "defect": [ [ "CSCvp90854" ] ], "discovery": "INTERNAL" }, "title": "Cisco IOS XR Software Intermediate System\u2013to\u2013Intermediate System Denial of Service Vulnerability", "x_legacyV4Record": { "CVE_data_meta": { "ASSIGNER": "psirt@cisco.com", "DATE_PUBLIC": "2019-08-07T16:00:00-0700", "ID": "CVE-2019-1918", "STATE": "PUBLIC", "TITLE": "Cisco IOS XR Software Intermediate System\u2013to\u2013Intermediate System Denial of Service Vulnerability" }, "affects": { "vendor": { "vendor_data": [ { "product": { "product_data": [ { "product_name": "Cisco IOS XR Software", "version": { "version_data": [ { "affected": "\u003c", "version_affected": "\u003c", "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 implementation of Intermediate System\u0026ndash;to\u0026ndash;Intermediate System (IS\u0026ndash;IS) routing protocol functionality in Cisco IOS XR Software could allow an unauthenticated attacker who is in the same IS-IS area to cause a denial of service (DoS) condition. The vulnerability is due to incorrect processing of IS\u0026ndash;IS link-state protocol data units (PDUs). An attacker could exploit this vulnerability by sending specific link-state PDUs to an affected system to be processed. A successful exploit could allow the attacker to cause incorrect calculations used in the weighted remote shared risk link groups (SRLG) or in the IGP Flexible Algorithm. It could also cause tracebacks to the logs or potentially cause the receiving device to crash the IS\u0026ndash;IS process, resulting in a DoS condition." } ] }, "exploit": [ { "lang": "en", "value": "The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory." } ], "impact": { "cvss": { "baseScore": "7.4", "vectorString": "CVSS:3.0/AV:A/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-20" } ] } ] }, "references": { "reference_data": [ { "name": "20190807 Cisco IOS XR Software Intermediate System\u2013to\u2013Intermediate System Denial of Service Vulnerability", "refsource": "CISCO", "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190807-iosxr-isis-dos-1918" } ] }, "source": { "advisory": "cisco-sa-20190807-iosxr-isis-dos-1918", "defect": [ [ "CSCvp90854" ] ], "discovery": "INTERNAL" } } } }, "cveMetadata": { "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633", "assignerShortName": "cisco", "cveId": "CVE-2019-1918", "datePublished": "2019-08-07T21:10:21.824782Z", "dateReserved": "2018-12-06T00:00:00", "dateUpdated": "2024-11-21T19:18:11.727Z", "state": "PUBLISHED" }, "dataType": "CVE_RECORD", "dataVersion": "5.1", "meta": { "nvd": "{\"cve\":{\"id\":\"CVE-2019-1918\",\"sourceIdentifier\":\"ykramarz@cisco.com\",\"published\":\"2019-08-07T22:15:15.447\",\"lastModified\":\"2024-11-21T04:37:41.070\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A vulnerability in the implementation of Intermediate System\u0026ndash;to\u0026ndash;Intermediate System (IS\u0026ndash;IS) routing protocol functionality in Cisco IOS XR Software could allow an unauthenticated attacker who is in the same IS-IS area to cause a denial of service (DoS) condition. The vulnerability is due to incorrect processing of IS\u0026ndash;IS link-state protocol data units (PDUs). An attacker could exploit this vulnerability by sending specific link-state PDUs to an affected system to be processed. A successful exploit could allow the attacker to cause incorrect calculations used in the weighted remote shared risk link groups (SRLG) or in the IGP Flexible Algorithm. It could also cause tracebacks to the logs or potentially cause the receiving device to crash the IS\u0026ndash;IS process, resulting in a DoS condition.\"},{\"lang\":\"es\",\"value\":\"Una vulnerabilidad en la implementaci\u00f3n en la funcionalidad del protocolo de enrutamiento de Intermediate System\u2013to\u2013Intermediate System (IS\u2013IS) en el software IOS XR de Cisco, podr\u00eda permitir a un atacante no autenticado que se encuentre en la misma \u00e1rea de IS-IS causar una condici\u00f3n de denegaci\u00f3n de servicio (DoS). La vulnerabilidad es debido al procesamiento incorrecto de las unidades de datos del protocolo (PDU) de estado de enlace de IS\u2013IS. Un atacante podr\u00eda explotar esta vulnerabilidad enviando PDU espec\u00edficas de estado de enlace a un sistema afectado para su procesamiento. Una explotaci\u00f3n con \u00e9xito podr\u00eda permitir al atacante causar c\u00e1lculos incorrectos utilizados en los grupos de enlace de riesgo compartido remoto ponderado (SRLG) o en el Algoritmo Flexible IGP. Tambi\u00e9n podr\u00eda causar trazas de vuelta en los registros o potencialmente causar que el dispositivo receptor bloquee el proceso IS\u2013IS, resultando en una condici\u00f3n DoS.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H\",\"baseScore\":7.4,\"baseSeverity\":\"HIGH\",\"attackVector\":\"ADJACENT_NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.8,\"impactScore\":4.0}],\"cvssMetricV30\":[{\"source\":\"ykramarz@cisco.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.0\",\"vectorString\":\"CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H\",\"baseScore\":7.4,\"baseSeverity\":\"HIGH\",\"attackVector\":\"ADJACENT_NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.8,\"impactScore\":4.0}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:A/AC:L/Au:N/C:N/I:N/A:C\",\"baseScore\":6.1,\"accessVector\":\"ADJACENT_NETWORK\",\"accessComplexity\":\"LOW\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"COMPLETE\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":6.5,\"impactScore\":6.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"ykramarz@cisco.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-20\"}]},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-682\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.5.2\",\"versionEndExcluding\":\"6.6.3\",\"matchCriteriaId\":\"84AF0440-E249-4656-B4E4-C62C58DA8BB9\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:carrier_routing_system:6.5.1:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"CFF40626-3D2C-42F2-A4B5-947118099FF4\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:carrier_routing_system:6.5.3:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"CE3F3615-A41D-4C14-BBFC-343AEEFECBDF\"}]}]}],\"references\":[{\"url\":\"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190807-iosxr-isis-dos-1918\",\"source\":\"ykramarz@cisco.com\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190807-iosxr-isis-dos-1918\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Vendor Advisory\"]}]}}" } }
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Sightings
Author | Source | Type | Date |
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Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.