CVE-2022-20849 (GCVE-0-2022-20849)

Vulnerability from cvelistv5 – Published: 2024-11-15 15:31 – Updated: 2024-11-15 15:46
VLAI?
Summary
A vulnerability in the Broadband Network Gateway PPP over Ethernet (PPPoE) feature of Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to cause the PPPoE process to continually crash. This 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 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 IOS XR Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see .
Severity ?
6.1 (Medium)
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
CWE
  • CWE-391 - Unchecked Error Condition
Assigner
References
Impacted products
Vendor Product Version
Cisco Cisco IOS XR Software Affected: 6.5.3
Affected: 6.6.1
Affected: 6.5.15
Affected: 7.0.1
Affected: 6.6.25
Affected: 6.6.2
Affected: 6.5.1
Affected: 6.5.2
Affected: 7.1.1
Affected: 7.0.90
Affected: 6.6.3
Affected: 6.7.1
Affected: 7.0.2
Affected: 7.1.15
Affected: 7.1.2
Affected: 7.2.1
Affected: 6.7.2
Affected: 7.1.25
Affected: 6.6.4
Affected: 7.3.1
Affected: 7.1.3
Affected: 6.7.3
Affected: 7.4.1
Affected: 7.2.2
Affected: 6.8.1
Affected: 7.3.2
Affected: 7.5.1
Affected: 7.3.3
Affected: 6.8.2
Affected: 7.3.4
Affected: 7.4.2
Affected: 6.7.35
Affected: 6.9.1
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Para obtener una lista completa de los avisos y los enlaces a ellos, 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Advisory\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2022-20849\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-11-15T15:46:04.754318Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-11-15T15:46:09.223Z\"}}], \"cna\": {\"title\": \"Cisco IOS XR Software Broadband Network Gateway PPPoE Denial of Service Vulnerability\", \"source\": {\"defects\": [\"CSCwa57311\"], \"advisory\": \"cisco-sa-iosxr-bng-Gmg5Gxt\", \"discovery\": \"EXTERNAL\"}, \"metrics\": [{\"format\": \"cvssV3_1\", \"cvssV3_1\": {\"scope\": \"CHANGED\", \"version\": \"3.1\", \"baseScore\": 6.1, \"attackVector\": \"ADJACENT_NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"HIGH\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}], \"affected\": [{\"vendor\": \"Cisco\", \"product\": \"Cisco IOS XR Software\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.5.3\"}, {\"status\": \"affected\", \"version\": \"6.6.1\"}, {\"status\": \"affected\", \"version\": \"6.5.15\"}, {\"status\": \"affected\", \"version\": \"7.0.1\"}, {\"status\": \"affected\", \"version\": \"6.6.25\"}, {\"status\": \"affected\", \"version\": \"6.6.2\"}, {\"status\": \"affected\", \"version\": \"6.5.1\"}, {\"status\": \"affected\", \"version\": \"6.5.2\"}, {\"status\": \"affected\", \"version\": \"7.1.1\"}, {\"status\": \"affected\", \"version\": \"7.0.90\"}, {\"status\": \"affected\", \"version\": \"6.6.3\"}, {\"status\": \"affected\", \"version\": \"6.7.1\"}, {\"status\": \"affected\", \"version\": \"7.0.2\"}, {\"status\": \"affected\", \"version\": \"7.1.15\"}, {\"status\": \"affected\", \"version\": \"7.1.2\"}, {\"status\": \"affected\", \"version\": \"7.2.1\"}, {\"status\": \"affected\", \"version\": \"6.7.2\"}, {\"status\": \"affected\", \"version\": \"7.1.25\"}, {\"status\": \"affected\", \"version\": \"6.6.4\"}, {\"status\": \"affected\", \"version\": \"7.3.1\"}, {\"status\": \"affected\", \"version\": \"7.1.3\"}, {\"status\": \"affected\", \"version\": \"6.7.3\"}, {\"status\": \"affected\", \"version\": \"7.4.1\"}, {\"status\": \"affected\", \"version\": \"7.2.2\"}, {\"status\": \"affected\", \"version\": \"6.8.1\"}, {\"status\": \"affected\", \"version\": \"7.3.2\"}, {\"status\": \"affected\", \"version\": \"7.5.1\"}, {\"status\": \"affected\", \"version\": \"7.3.3\"}, {\"status\": \"affected\", \"version\": \"6.8.2\"}, {\"status\": \"affected\", \"version\": \"7.3.4\"}, {\"status\": \"affected\", \"version\": \"7.4.2\"}, {\"status\": \"affected\", \"version\": \"6.7.35\"}, {\"status\": \"affected\", \"version\": \"6.9.1\"}], \"defaultStatus\": \"unknown\"}], \"exploits\": [{\"lang\": \"en\", \"value\": \"The Cisco\\u00a0PSIRT is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.\"}], \"references\": [{\"url\": \"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-bng-Gmg5Gxt\", \"name\": \"cisco-sa-iosxr-bng-Gmg5Gxt\"}], \"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 .\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"cwe\", \"cweId\": \"CWE-391\", \"description\": \"Unchecked Error Condition\"}]}], \"providerMetadata\": {\"orgId\": \"d1c1063e-7a18-46af-9102-31f8928bc633\", \"shortName\": \"cisco\", \"dateUpdated\": \"2024-11-15T15:31:20.913Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2022-20849\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-11-15T15:46:25.684Z\", \"dateReserved\": \"2021-11-02T13:28:29.180Z\", \"assignerOrgId\": \"d1c1063e-7a18-46af-9102-31f8928bc633\", \"datePublished\": \"2024-11-15T15:31:20.913Z\", \"assignerShortName\": \"cisco\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.