cve-2022-20849
Vulnerability from cvelistv5
Published
2024-11-15 15:31
Modified
2024-11-15 15:46
Severity ?
EPSS score ?
Summary
Cisco IOS XR Software Broadband Network Gateway PPPoE Denial of Service Vulnerability
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| ▼ | Cisco | Cisco IOS XR Software |
Version: 6.5.3 Version: 6.6.1 Version: 6.5.15 Version: 7.0.1 Version: 6.6.25 Version: 6.6.2 Version: 6.5.1 Version: 6.5.2 Version: 7.1.1 Version: 7.0.90 Version: 6.6.3 Version: 6.7.1 Version: 7.0.2 Version: 7.1.15 Version: 7.1.2 Version: 7.2.1 Version: 6.7.2 Version: 7.1.25 Version: 6.6.4 Version: 7.3.1 Version: 7.1.3 Version: 6.7.3 Version: 7.4.1 Version: 7.2.2 Version: 6.8.1 Version: 7.3.2 Version: 7.5.1 Version: 7.3.3 Version: 6.8.2 Version: 7.3.4 Version: 7.4.2 Version: 6.7.35 Version: 6.9.1 |
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"other": {
"content": {
"id": "CVE-2022-20849",
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"Exploitation": "none"
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{
"Automatable": "no"
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"timestamp": "2024-11-15T15:46:04.754318Z",
"version": "2.0.3"
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"version": "6.5.15"
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"value": "A vulnerability in the Broadband Network Gateway PPP over Ethernet (PPPoE) feature of Cisco\u0026nbsp;IOS XR Software could allow an unauthenticated, adjacent attacker to cause the PPPoE process to continually crash.\r\nThis vulnerability exists because the PPPoE feature does not properly handle an error condition within a specific crafted packet sequence. An attacker could exploit this vulnerability by sending a sequence of specific PPPoE packets from controlled customer premises equipment (CPE). A successful exploit could allow the attacker to cause the PPPoE process to continually restart, resulting in a denial of service condition (DoS).Cisco\u0026nbsp;has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.This advisory is part of the September 2022 release of the Cisco\u0026nbsp;IOS XR Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see ."
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"exploits": [
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"value": "The Cisco\u00a0PSIRT is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory."
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"baseScore": 6.1,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
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"version": "3.1"
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"references": [
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"name": "cisco-sa-iosxr-bng-Gmg5Gxt",
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"defects": [
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"discovery": "EXTERNAL"
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"title": "Cisco IOS XR Software Broadband Network Gateway PPPoE Denial of Service Vulnerability"
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"cveId": "CVE-2022-20849",
"datePublished": "2024-11-15T15:31:20.913Z",
"dateReserved": "2021-11-02T13:28:29.180Z",
"dateUpdated": "2024-11-15T15:46:25.684Z",
"state": "PUBLISHED"
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"meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2022-20849\",\"sourceIdentifier\":\"ykramarz@cisco.com\",\"published\":\"2024-11-15T16:15:23.327\",\"lastModified\":\"2024-11-18T17:11:56.587\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A vulnerability in the Broadband Network Gateway PPP over Ethernet (PPPoE) feature of Cisco\u0026nbsp;IOS XR Software could allow an unauthenticated, adjacent attacker to cause the PPPoE process to continually crash.\\r\\nThis vulnerability exists because the PPPoE feature does not properly handle an error condition within a specific crafted packet sequence. An attacker could exploit this vulnerability by sending a sequence of specific PPPoE packets from controlled customer premises equipment (CPE). A successful exploit could allow the attacker to cause the PPPoE process to continually restart, resulting in a denial of service condition (DoS).Cisco\u0026nbsp;has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.This advisory is part of the September 2022 release of the Cisco\u0026nbsp;IOS XR Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see .\"},{\"lang\":\"es\",\"value\":\"Una vulnerabilidad en la funci\u00f3n Broadband Network Gateway PPP over Ethernet (PPPoE) del software Cisco IOS XR podr\u00eda permitir que un atacante adyacente no autenticado provoque que el proceso PPPoE se bloquee continuamente. Esta vulnerabilidad existe porque la funci\u00f3n PPPoE no maneja correctamente una condici\u00f3n de error dentro de una secuencia de paquetes espec\u00edfica manipulada. Un atacante podr\u00eda aprovechar esta vulnerabilidad enviando una secuencia de paquetes PPPoE espec\u00edficos desde un equipo local del cliente (CPE) controlado. Una explotaci\u00f3n exitosa podr\u00eda permitir que el atacante haga que el proceso PPPoE se reinicie continuamente, lo que da como resultado una condici\u00f3n de denegaci\u00f3n de servicio (DoS). Cisco ha publicado actualizaciones de software que solucionan esta vulnerabilidad. No existen workarounds que solucionen esta vulnerabilidad. Este aviso es parte de la publicaci\u00f3n de septiembre de 2022 del aviso de seguridad del software Cisco IOS XR. Para obtener una lista completa de los avisos y los enlaces a ellos, consulte.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"ykramarz@cisco.com\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H\",\"baseScore\":6.1,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"ADJACENT_NETWORK\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.6,\"impactScore\":4.0}]},\"weaknesses\":[{\"source\":\"ykramarz@cisco.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-391\"}]}],\"references\":[{\"url\":\"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-bng-Gmg5Gxt\",\"source\":\"ykramarz@cisco.com\"}]}}"
}
}
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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.