CVE-2021-34793
Vulnerability from cvelistv5
Published
2021-10-27 18:56
Modified
2024-11-07 21:45
Severity ?
EPSS score ?
Summary
Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Transparent Mode Denial of Service Vulnerability
References
Impacted products
▼ | Vendor | Product |
---|---|---|
Cisco | Cisco Adaptive Security Appliance (ASA) Software |
{ "containers": { "adp": [ { "providerMetadata": { "dateUpdated": "2024-08-04T00:19:48.210Z", "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE" }, "references": [ { "name": "20211027 Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Transparent Mode Denial of Service Vulnerability", "tags": [ "vendor-advisory", "x_refsource_CISCO", "x_transferred" ], "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-dos-JxYWMJyL" } ], "title": "CVE Program Container" }, { "metrics": [ { "other": { "content": { "id": "CVE-2021-34793", "options": [ { "Exploitation": "none" }, { "Automatable": "yes" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "timestamp": "2024-11-07T21:44:27.592582Z", "version": "2.0.3" }, "type": "ssvc" } } ], "providerMetadata": { "dateUpdated": "2024-11-07T21:45:43.962Z", "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP" }, "title": "CISA ADP Vulnrichment" } ], "cna": { "affected": [ { "product": "Cisco Adaptive Security Appliance (ASA) Software", "vendor": "Cisco", "versions": [ { "status": "affected", "version": "n/a" } ] } ], "datePublic": "2021-10-27T00:00:00", "descriptions": [ { "lang": "en", "value": "A vulnerability in the TCP Normalizer of Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software operating in transparent mode could allow an unauthenticated, remote attacker to poison MAC address tables, resulting in a denial of service (DoS) vulnerability. This vulnerability is due to incorrect handling of certain TCP segments when the affected device is operating in transparent mode. An attacker could exploit this vulnerability by sending a crafted TCP segment through an affected device. A successful exploit could allow the attacker to poison the MAC address tables in adjacent devices, resulting in network disruption." } ], "exploits": [ { "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." } ], "metrics": [ { "cvssV3_1": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.6, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H", "version": "3.1" } } ], "problemTypes": [ { "descriptions": [ { "cweId": "CWE-924", "description": "CWE-924", "lang": "en", "type": "CWE" } ] } ], "providerMetadata": { "dateUpdated": "2021-10-27T18:56:26", "orgId": "d1c1063e-7a18-46af-9102-31f8928bc633", "shortName": "cisco" }, "references": [ { "name": "20211027 Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Transparent Mode Denial of Service Vulnerability", "tags": [ "vendor-advisory", "x_refsource_CISCO" ], "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-dos-JxYWMJyL" } ], "source": { "advisory": "cisco-sa-asa-ftd-dos-JxYWMJyL", "defect": [ [ "CSCvx46296" ] ], "discovery": "INTERNAL" }, "title": "Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Transparent Mode Denial of Service Vulnerability", "x_legacyV4Record": { "CVE_data_meta": { "ASSIGNER": "psirt@cisco.com", "DATE_PUBLIC": "2021-10-27T16:00:00", "ID": "CVE-2021-34793", "STATE": "PUBLIC", "TITLE": "Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Transparent Mode Denial of Service Vulnerability" }, "affects": { "vendor": { "vendor_data": [ { "product": { "product_data": [ { "product_name": "Cisco Adaptive Security Appliance (ASA) Software", "version": { "version_data": [ { "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 TCP Normalizer of Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software operating in transparent mode could allow an unauthenticated, remote attacker to poison MAC address tables, resulting in a denial of service (DoS) vulnerability. This vulnerability is due to incorrect handling of certain TCP segments when the affected device is operating in transparent mode. An attacker could exploit this vulnerability by sending a crafted TCP segment through an affected device. A successful exploit could allow the attacker to poison the MAC address tables in adjacent devices, resulting in network disruption." } ] }, "exploit": [ { "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." } ], "impact": { "cvss": { "baseScore": "8.6", "vectorString": "CVSS:3.1/AV:N/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-924" } ] } ] }, "references": { "reference_data": [ { "name": "20211027 Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Transparent Mode Denial of Service Vulnerability", "refsource": "CISCO", "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-dos-JxYWMJyL" } ] }, "source": { "advisory": "cisco-sa-asa-ftd-dos-JxYWMJyL", "defect": [ [ "CSCvx46296" ] ], "discovery": "INTERNAL" } } } }, "cveMetadata": { "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633", "assignerShortName": "cisco", "cveId": "CVE-2021-34793", "datePublished": "2021-10-27T18:56:26.248036Z", "dateReserved": "2021-06-15T00:00:00", "dateUpdated": "2024-11-07T21:45:43.962Z", "state": "PUBLISHED" }, "dataType": "CVE_RECORD", "dataVersion": "5.1", "meta": { "nvd": "{\"cve\":{\"id\":\"CVE-2021-34793\",\"sourceIdentifier\":\"ykramarz@cisco.com\",\"published\":\"2021-10-27T19:15:08.563\",\"lastModified\":\"2023-11-07T03:36:26.283\",\"vulnStatus\":\"Modified\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"A vulnerability in the TCP Normalizer of Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software operating in transparent mode could allow an unauthenticated, remote attacker to poison MAC address tables, resulting in a denial of service (DoS) vulnerability. This vulnerability is due to incorrect handling of certain TCP segments when the affected device is operating in transparent mode. An attacker could exploit this vulnerability by sending a crafted TCP segment through an affected device. A successful exploit could allow the attacker to poison the MAC address tables in adjacent devices, resulting in network disruption.\"},{\"lang\":\"es\",\"value\":\"Una vulnerabilidad en el Normalizador TCP del software Cisco Adaptive Security Appliance (ASA) y del software Firepower Threat Defense (FTD) que funciona en modo transparente podr\u00eda permitir a un atacante remoto no autenticado envenenar las tablas de direcciones MAC, lo que provocar\u00eda una vulnerabilidad de denegaci\u00f3n de servicio (DoS). Esta vulnerabilidad es debido al manejo incorrecto de determinados segmentos TCP cuando el dispositivo afectado est\u00e1 operando en modo transparente. Un atacante podr\u00eda explotar esta vulnerabilidad mediante el env\u00edo de un segmento TCP dise\u00f1ado mediante un dispositivo afectado. Una explotaci\u00f3n con \u00e9xito podr\u00eda permitir al atacante envenenar las tablas de direcciones MAC en los dispositivos adyacentes, resultando en una interrupci\u00f3n de la red\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\",\"baseScore\":8.6,\"baseSeverity\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":4.0},{\"source\":\"ykramarz@cisco.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\",\"baseScore\":8.6,\"baseSeverity\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":4.0}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:L/Au:N/C:N/I:N/A:P\",\"accessVector\":\"NETWORK\",\"accessComplexity\":\"LOW\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"PARTIAL\",\"baseScore\":5.0},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":10.0,\"impactScore\":2.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-924\"}]},{\"source\":\"ykramarz@cisco.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-924\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"9.8.4.40\",\"matchCriteriaId\":\"8C7F329B-4EF5-411A-9AB6-02E6A4162D6D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"6.4.0.13\",\"matchCriteriaId\":\"5429F29E-BEE8-4989-B5F3-A9BABBF64D31\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.5.0\",\"versionEndExcluding\":\"6.6.5\",\"matchCriteriaId\":\"18589C74-19D2-44F0-AF26-68910E26655D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7.0\",\"versionEndExcluding\":\"6.7.0.3\",\"matchCriteriaId\":\"98DEDDAB-B8C5-4753-A208-94638E694FC1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"9.9.0\",\"versionEndExcluding\":\"9.12.4.29\",\"matchCriteriaId\":\"796D02D8-AD57-49E8-93F6-5CC0E4D2F883\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"9.13.0\",\"versionEndExcluding\":\"9.14.3.9\",\"matchCriteriaId\":\"333EFE8A-1514-4F7A-BBF4-876DC1B2E5A4\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"9.15.0\",\"versionEndExcluding\":\"9.15.1.17\",\"matchCriteriaId\":\"F6EC0723-CBC7-45A7-8B30-B680E8A771EF\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"9.16.0\",\"versionEndExcluding\":\"9.16.2.3\",\"matchCriteriaId\":\"310B86D1-730D-4D8A-AC95-31FBE4F7D1E6\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:cisco:asa_5512-x:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"08F0F160-DAD2-48D4-B7B2-4818B2526F35\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:asa_5512-x_firmware:009.008\\\\(004.025\\\\):*:*:*:*:*:*:*\",\"matchCriteriaId\":\"A8A0AC98-6994-4055-99FC-C24E7DD2964D\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:cisco:asa_5505:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"8E6A8BB7-2000-4CA2-9DD7-89573CE4C73A\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:asa_5505_firmware:009.008\\\\(004.025\\\\):*:*:*:*:*:*:*\",\"matchCriteriaId\":\"325AF17C-5C97-44CC-9F72-E077E2E5968C\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:cisco:asa_5515-x:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"977D597B-F6DE-4438-AB02-06BE64D71EBE\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:asa_5515-x_firmware:009.008\\\\(004.025\\\\):*:*:*:*:*:*:*\",\"matchCriteriaId\":\"FC3C43A2-BFA1-4A53-8D7B-0270050D3CE9\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:cisco:asa_5525-x:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"EB71EB29-0115-4307-A9F7-262394FD9FB0\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:asa_5525-x_firmware:009.008\\\\(004.025\\\\):*:*:*:*:*:*:*\",\"matchCriteriaId\":\"6CC7F335-8D93-408F-A9B6-427AEC590BE7\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:cisco:asa_5545-x:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"57179F60-E330-4FF0-9664-B1E4637FF210\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:asa_5545-x_firmware:009.008\\\\(004.025\\\\):*:*:*:*:*:*:*\",\"matchCriteriaId\":\"50319E62-91FD-40EC-98C0-F2ADB51EA8B8\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:cisco:asa_5555-x:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"5535C936-391B-4619-AA03-B35265FC15D7\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:asa_5555-x_firmware:009.008\\\\(004.025\\\\):*:*:*:*:*:*:*\",\"matchCriteriaId\":\"73A3286F-B9A7-407C-A08A-C4BBF6EAF03D\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:cisco:asa_5580:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"D1E828B8-5ECC-4A09-B2AD-DEDC558713DE\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:asa_5580_firmware:009.008\\\\(004.025\\\\):*:*:*:*:*:*:*\",\"matchCriteriaId\":\"4205DEA9-C321-4845-B86A-07EABA461DD9\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:cisco:asa_5585-x:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"16AE20C2-C77E-4E04-BF13-A48696E52426\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:asa_5585-x_firmware:009.008\\\\(004.025\\\\):*:*:*:*:*:*:*\",\"matchCriteriaId\":\"6D8296D0-BEE7-4788-AE23-E880345CD06A\"}]}]}],\"references\":[{\"url\":\"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-dos-JxYWMJyL\",\"source\":\"ykramarz@cisco.com\",\"tags\":[\"Vendor Advisory\"]}]}}" } }
Loading...
Loading...
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.