cve-2024-20406
Vulnerability from cvelistv5
Published
2024-09-11 16:38
Modified
2024-09-11 20:38
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: 7.4.1 Version: 6.8.1 Version: 7.4.15 Version: 7.5.1 Version: 7.4.16 Version: 7.6.1 Version: 7.5.2 Version: 7.8.1 Version: 7.6.15 Version: 7.5.12 Version: 7.7.1 Version: 6.8.2 Version: 7.4.2 Version: 6.9.1 Version: 7.6.2 Version: 7.5.3 Version: 7.7.2 Version: 6.9.2 Version: 7.9.1 Version: 7.10.1 Version: 7.8.2 Version: 7.5.4 Version: 7.8.22 Version: 7.7.21 Version: 7.9.2 Version: 7.5.5 Version: 7.11.1 Version: 7.9.21 Version: 7.10.2 Version: 7.6.3 |
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"content": {
"id": "CVE-2024-20406",
"options": [
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"Exploitation": "none"
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{
"Automatable": "no"
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"Technical Impact": "partial"
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"role": "CISA Coordinator",
"timestamp": "2024-09-11T20:38:32.503942Z",
"version": "2.0.3"
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"shortName": "CISA-ADP"
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"vendor": "Cisco",
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"version": "7.4.1"
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"status": "affected",
"version": "6.8.1"
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"version": "7.4.15"
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"version": "7.4.16"
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"version": "7.6.1"
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"version": "7.5.2"
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{
"status": "affected",
"version": "7.8.1"
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{
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{
"status": "affected",
"version": "7.5.12"
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{
"status": "affected",
"version": "7.7.1"
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{
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"version": "6.8.2"
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{
"status": "affected",
"version": "7.4.2"
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{
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"version": "7.5.5"
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"version": "7.11.1"
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"value": "A vulnerability in the segment routing feature for the Intermediate System-to-Intermediate System (IS-IS) protocol of Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device.\r\n\r\nThis vulnerability is due to insufficient input validation of ingress IS-IS packets. An attacker could exploit this vulnerability by sending specific IS-IS packets to an affected device after forming an adjacency. A successful exploit could allow the attacker to cause the IS-IS process on all affected devices that are participating in the Flexible Algorithm to crash and restart, resulting in a DoS condition.\r\nNote: The IS-IS protocol is a routing protocol. To exploit this vulnerability, an attacker must be Layer 2-adjacent to the affected device and must have formed an adjacency. This vulnerability affects segment routing for IS-IS over IPv4 and IPv6 control planes as well as devices that are configured as level 1, level 2, or multi-level routing IS-IS type."
}
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"exploits": [
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"lang": "en",
"value": "The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory."
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"attackVector": "ADJACENT_NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.4,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
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"problemTypes": [
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"description": "Improper Input Validation",
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"dateUpdated": "2024-09-11T16:38:50.133Z",
"orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"shortName": "cisco"
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"references": [
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"name": "cisco-sa-isis-xehpbVNe",
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-isis-xehpbVNe"
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"source": {
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"defects": [
"CSCwi39542"
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"discovery": "EXTERNAL"
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"title": "Cisco IOS XR Software Intermediate System-to-Intermediate System Denial of Service Vulnerability"
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"cveId": "CVE-2024-20406",
"datePublished": "2024-09-11T16:38:50.133Z",
"dateReserved": "2023-11-08T15:08:07.661Z",
"dateUpdated": "2024-09-11T20:38:41.758Z",
"state": "PUBLISHED"
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"meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2024-20406\",\"sourceIdentifier\":\"ykramarz@cisco.com\",\"published\":\"2024-09-11T17:15:13.040\",\"lastModified\":\"2024-10-07T17:56:43.103\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A vulnerability in the segment routing feature for the Intermediate System-to-Intermediate System (IS-IS) protocol of Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device.\\r\\n\\r\\nThis vulnerability is due to insufficient input validation of ingress IS-IS packets. An attacker could exploit this vulnerability by sending specific IS-IS packets to an affected device after forming an adjacency. A successful exploit could allow the attacker to cause the IS-IS process on all affected devices that are participating in the Flexible Algorithm to crash and restart, resulting in a DoS condition.\\r\\nNote: The IS-IS protocol is a routing protocol. To exploit this vulnerability, an attacker must be Layer 2-adjacent to the affected device and must have formed an adjacency. This vulnerability affects segment routing for IS-IS over IPv4 and IPv6 control planes as well as devices that are configured as level 1, level 2, or multi-level routing IS-IS type.\"},{\"lang\":\"es\",\"value\":\"Una vulnerabilidad en la funci\u00f3n de enrutamiento de segmentos para el protocolo de sistema intermedio a sistema intermedio (IS-IS) del software Cisco IOS XR podr\u00eda permitir que un atacante adyacente no autenticado provoque una condici\u00f3n de denegaci\u00f3n de servicio (DoS) en un dispositivo afectado. Esta vulnerabilidad se debe a una validaci\u00f3n de entrada insuficiente de los paquetes IS-IS de entrada. Un atacante podr\u00eda aprovechar esta vulnerabilidad enviando paquetes IS-IS espec\u00edficos a un dispositivo afectado despu\u00e9s de formar una adyacencia. Una explotaci\u00f3n exitosa podr\u00eda permitir que el atacante provoque que el proceso IS-IS en todos los dispositivos afectados que participan en el algoritmo flexible se bloquee y se reinicie, lo que da como resultado una condici\u00f3n de DoS. Nota: El protocolo IS-IS es un protocolo de enrutamiento. Para aprovechar esta vulnerabilidad, un atacante debe estar adyacente a la capa 2 del dispositivo afectado y debe haber formado una adyacencia. Esta vulnerabilidad afecta al enrutamiento de segmentos para IS-IS sobre planos de control IPv4 e IPv6, as\u00ed como a dispositivos que est\u00e1n configurados como tipo IS-IS de enrutamiento de nivel 1, nivel 2 o multinivel.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"ykramarz@cisco.com\",\"type\":\"Secondary\",\"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},{\"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}]},\"weaknesses\":[{\"source\":\"ykramarz@cisco.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-20\"}]},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.8.1\",\"versionEndExcluding\":\"7.0.0\",\"matchCriteriaId\":\"A21D4B88-10AE-4726-9D00-48CF36068409\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"7.4.1\",\"versionEndExcluding\":\"7.11.2\",\"matchCriteriaId\":\"6BB02B4B-AC47-4DFF-BB0F-AD0F2D12866B\"}]}]}],\"references\":[{\"url\":\"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-isis-xehpbVNe\",\"source\":\"ykramarz@cisco.com\",\"tags\":[\"Vendor Advisory\"]}]}}"
}
}
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Sightings
| Author | Source | Type | Date |
|---|
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.