CVE-2021-1220 (GCVE-0-2021-1220)

Vulnerability from cvelistv5 – Published: 2021-03-24 20:16 – Updated: 2024-09-17 03:43
VLAI?
Summary
Multiple vulnerabilities in the web UI of Cisco IOS XE Software could allow an authenticated, remote attacker with read-only privileges to cause the web UI software to become unresponsive and consume vty line instances, resulting in a denial of service (DoS) condition. These vulnerabilities are due to insufficient error handling in the web UI. An attacker could exploit these vulnerabilities by sending crafted HTTP packets to an affected device. A successful exploit could allow the attacker to cause the web UI software to become unresponsive and consume all available vty lines, preventing new session establishment and resulting in a DoS condition. Manual intervention would be required to regain web UI and vty session functionality. Note: These vulnerabilities do not affect the console connection.
Severity ?
4.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
CWE
Assigner
References
https://tools.cisco.com/security/center/content/C… vendor-advisoryx_refsource_CISCO
Impacted products
Vendor Product Version
Cisco Cisco IOS XE Software Affected: n/a
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Note: These vulnerabilities do not affect the console connection.\"},{\"lang\":\"es\",\"value\":\"M\u00faltiples vulnerabilidades en la Interfaz de Usuario Web del Software Cisco IOS XE, podr\u00edan permitir a un atacante remoto autenticado con privilegios de solo lectura hacer que el software de la interfaz de usuario web deje de responder y consuma instancias de l\u00ednea vty, lo que resultar\u00e1 en una condici\u00f3n de denegaci\u00f3n de servicio (DoS).\u0026#xa0;Estas vulnerabilidades son debido a un manejo insuficiente de errores en la Interfaz de Usuario Web.\u0026#xa0;Un atacante podr\u00eda explotar estas vulnerabilidades mediante el env\u00edo de paquetes HTTP dise\u00f1ados a un dispositivo afectado.\u0026#xa0;Una explotaci\u00f3n con \u00e9xito podr\u00eda permitir el atacante causar que el software de la interfaz de usuario web deje de responder y consumiera todas las l\u00edneas vty disponibles, impidiendo el establecimiento de una nueva sesi\u00f3n y dando como resultado una condici\u00f3n de DoS.\u0026#xa0;Se necesitar\u00eda una intervenci\u00f3n manual para recuperar la Interfaz de Usuario Web y la funcionalidad de la sesi\u00f3n vty.\u0026#xa0;Nota: estas vulnerabilidades no afectan la conexi\u00f3n de la consola\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"psirt@cisco.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L\",\"baseScore\":4.3,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"LOW\"},\"exploitabilityScore\":2.8,\"impactScore\":1.4},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L\",\"baseScore\":4.3,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"LOW\"},\"exploitabilityScore\":2.8,\"impactScore\":1.4}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:M/Au:S/C:N/I:N/A:P\",\"baseScore\":3.5,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"MEDIUM\",\"authentication\":\"SINGLE\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"PARTIAL\"},\"baseSeverity\":\"LOW\",\"exploitabilityScore\":6.8,\"impactScore\":2.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"psirt@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_xe:3.15.1xbs:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"4BF22C29-84DF-44CA-B574-FE04AB39E344\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:ios_xe:3.15.2xbs:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"C2C7C0BA-D618-4B65-B42C-43393167EEE0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:ios_xe:16.11.1:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"E91F8704-6DAD-474A-84EA-04E4AF7BB9B1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:ios_xe:16.11.1a:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"314C7763-A64D-4023-9F3F-9A821AE4151F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:ios_xe:16.11.1b:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"5820D71D-FC93-45AA-BC58-A26A1A39C936\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:ios_xe:16.11.1c:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"FC1C85DD-69CC-4AA8-B219-651D57FC3506\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:ios_xe:16.11.1s:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"DB26AE0F-85D8-4EAB-B9BD-457DD81FF0FE\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:ios_xe:16.11.2:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"B53E377A-0296-4D7A-B97C-576B0026543D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:ios_xe:16.12.1:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"C98DED36-D4B5-48D6-964E-EEEE97936700\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:ios_xe:16.12.1a:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"CD98C9E8-3EA6-4160-970D-37C389576516\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:ios_xe:16.12.1c:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"C8BEFEDA-B01A-480B-B03D-7ED5D08E4B67\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:ios_xe:16.12.1s:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"9027A528-2588-4C06-810B-5BB313FE4323\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:ios_xe:16.12.1t:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"7745ED34-D59D-49CC-B174-96BCA03B3374\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:ios_xe:16.12.1w:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"19AF4CF3-6E79-4EA3-974D-CD451A192BA9\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:ios_xe:16.12.1x:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"313BD54C-073C-4F27-82D5-C99EFC3A20F7\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:ios_xe:16.12.1y:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"93B96E01-3777-4C33-9225-577B469A6CE5\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:ios_xe:16.12.1z:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"65FC3CC1-CF4F-4A2D-A500-04395AFE8B47\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:ios_xe:16.12.2:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"E5019B59-508E-40B0-9C92-2C26F58E2FBE\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:ios_xe:16.12.2a:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"443D78BA-A3DA-4D1F-A4DF-2F426DC6B841\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:ios_xe:16.12.2s:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"1986DB1F-AD0A-42FE-8EC8-F18BA1AD4F99\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:ios_xe:16.12.2t:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"3C6FB4DC-814D-49D2-BBE2-3861AE985A1C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:ios_xe:16.12.3:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"D5750264-2990-4942-85F4-DB9746C5CA2B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:ios_xe:16.12.3a:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"02352FD8-2A7B-41BD-9E4A-F312ABFDF3EF\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:ios_xe:16.12.3s:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"B9173AD6-6658-4267-AAA7-D50D0B657528\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:ios_xe:16.12.4:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"7F02EE9D-45B1-43D6-B05D-6FF19472216B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:ios_xe:16.12.4a:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"1C1DBBCD-4C5A-43BB-8FB0-6F1AF99ED0D2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:ios_xe:17.1.1:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"E306B09C-CB48-4067-B60C-5F738555EEAC\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:ios_xe:17.1.1a:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"CD446C51-E713-4E46-8328-0A0477D140D2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:ios_xe:17.1.1s:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"4FF0DD16-D76A-45EA-B01A-20C71AEFA3B4\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:ios_xe:17.1.1t:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"4BDD0CEC-4A19-438D-B2A1-8664A1D8F3C4\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:ios_xe:17.1.2:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"89369318-2E83-489F-B872-5F2E247BBF8F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:ios_xe:17.2.1:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"4B7EE7C7-D6C1-4C35-8C80-EAF3FC7E7EFA\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:ios_xe:17.2.1a:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"B51FA707-8DB1-4596-9122-D4BFEF17F400\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:ios_xe:17.2.1r:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"C04DF35A-1B6F-420A-8D84-74EB41BF3700\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:ios_xe:17.2.1v:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"211CC9B2-6108-4C50-AB31-DC527C43053E\"}]}]}],\"references\":[{\"url\":\"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xe-webui-dos-z9yqYQAn\",\"source\":\"psirt@cisco.com\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xe-webui-dos-z9yqYQAn\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Vendor Advisory\"]}]}}"
  }
}


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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.