CVE-2021-34783 (GCVE-0-2021-34783)

Vulnerability from cvelistv5 – Published: 2021-10-27 18:55 – Updated: 2024-11-07 21:46
VLAI?
Summary
A vulnerability in the software-based SSL/TLS message handler of Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. This vulnerability is due to insufficient validation of SSL/TLS messages when the device performs software-based SSL/TLS decryption. An attacker could exploit this vulnerability by sending a crafted SSL/TLS message to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. Note: Datagram TLS (DTLS) messages cannot be used to exploit this vulnerability.
Severity ?
8.6 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
CWE
Assigner
References
https://tools.cisco.com/security/center/content/C… vendor-advisoryx_refsource_CISCO
Impacted products
Vendor Product Version
Cisco Cisco Adaptive Security Appliance (ASA) Software Affected: n/a
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T00:19:48.253Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "name": "20211027 Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Software-Based SSL/TLS Denial of Service Vulnerability",
            "tags": [
              "vendor-advisory",
              "x_refsource_CISCO",
              "x_transferred"
            ],
            "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-tls-decrypt-dos-BMxYjm8M"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2021-34783",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-11-07T21:44:32.072886Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-11-07T21:46:04.938Z",
          "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 software-based SSL/TLS message handler of Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. This vulnerability is due to insufficient validation of SSL/TLS messages when the device performs software-based SSL/TLS decryption. An attacker could exploit this vulnerability by sending a crafted SSL/TLS message to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. Note: Datagram TLS (DTLS) messages cannot be used to exploit this vulnerability."
        }
      ],
      "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-119",
              "description": "CWE-119",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-10-27T18:55:57",
        "orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
        "shortName": "cisco"
      },
      "references": [
        {
          "name": "20211027 Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Software-Based SSL/TLS Denial of Service Vulnerability",
          "tags": [
            "vendor-advisory",
            "x_refsource_CISCO"
          ],
          "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-tls-decrypt-dos-BMxYjm8M"
        }
      ],
      "source": {
        "advisory": "cisco-sa-ftd-tls-decrypt-dos-BMxYjm8M",
        "defect": [
          [
            "CSCvy55054"
          ]
        ],
        "discovery": "INTERNAL"
      },
      "title": "Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Software-Based SSL/TLS Denial of Service Vulnerability",
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "psirt@cisco.com",
          "DATE_PUBLIC": "2021-10-27T16:00:00",
          "ID": "CVE-2021-34783",
          "STATE": "PUBLIC",
          "TITLE": "Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Software-Based SSL/TLS 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 software-based SSL/TLS message handler of Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. This vulnerability is due to insufficient validation of SSL/TLS messages when the device performs software-based SSL/TLS decryption. An attacker could exploit this vulnerability by sending a crafted SSL/TLS message to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. Note: Datagram TLS (DTLS) messages cannot be used to exploit this vulnerability."
            }
          ]
        },
        "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-119"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "20211027 Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Software-Based SSL/TLS Denial of Service Vulnerability",
              "refsource": "CISCO",
              "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-tls-decrypt-dos-BMxYjm8M"
            }
          ]
        },
        "source": {
          "advisory": "cisco-sa-ftd-tls-decrypt-dos-BMxYjm8M",
          "defect": [
            [
              "CSCvy55054"
            ]
          ],
          "discovery": "INTERNAL"
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
    "assignerShortName": "cisco",
    "cveId": "CVE-2021-34783",
    "datePublished": "2021-10-27T18:55:57.640344Z",
    "dateReserved": "2021-06-15T00:00:00",
    "dateUpdated": "2024-11-07T21:46:04.938Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "fkie_nvd": {
      "configurations": "[{\"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"6.4.0\", \"versionEndExcluding\": \"6.4.0.13\", \"matchCriteriaId\": \"17F461B5-E600-4C81-BA3C-1DBC90D4D438\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"6.6.0\", \"versionEndExcluding\": \"6.6.5\", \"matchCriteriaId\": \"37A74256-AF9A-473B-9DC7-A57618BA9F00\"}, {\"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:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"7.0.0\", \"versionEndExcluding\": \"7.0.1\", \"matchCriteriaId\": \"7B2F537A-A488-45B6-AD4B-48B7064AE84C\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"9.8.0\", \"versionEndExcluding\": \"9.8.4.40\", \"matchCriteriaId\": \"8F6EF272-6D43-476C-B35D-DDE79A7A01C5\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"9.12.0\", \"versionEndExcluding\": \"9.12.4.29\", \"matchCriteriaId\": \"B10BB7F0-1CC7-4331-A05C-3C20B0584C04\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"9.14.0\", \"versionEndExcluding\": \"9.14.3.9\", \"matchCriteriaId\": \"C6828628-B179-4188-92CE-1D488859D92D\"}, {\"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\", \"matchCriteriaId\": \"25DBA8C5-EB2F-4C01-88BA-EC2D720F9F7C\"}]}]}, {\"operator\": \"AND\", \"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:cisco:asa_5512-x_firmware:009.016\\\\(001\\\\):*:*:*:*:*:*:*\", \"matchCriteriaId\": \"4D96435F-F035-486E-86AA-DB9A1A1878F4\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:cisco:asa_5512-x_firmware:009.016\\\\(001.025\\\\):*:*:*:*:*:*:*\", \"matchCriteriaId\": \"BEEEB3EB-7AD9-4498-BEE5-12A374AEF0FC\"}]}, {\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": false, \"criteria\": \"cpe:2.3:h:cisco:asa_5512-x:-:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"08F0F160-DAD2-48D4-B7B2-4818B2526F35\"}]}]}, {\"operator\": \"AND\", \"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:cisco:asa_5505_firmware:009.016\\\\(001\\\\):*:*:*:*:*:*:*\", \"matchCriteriaId\": \"B6AA6797-A9F7-4036-8241-F822B30C9DFB\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:cisco:asa_5505_firmware:009.016\\\\(001.025\\\\):*:*:*:*:*:*:*\", \"matchCriteriaId\": \"74DF1599-7739-47DD-AD89-B9C48D1ED2EC\"}]}, {\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": false, \"criteria\": \"cpe:2.3:h:cisco:asa_5505:-:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"8E6A8BB7-2000-4CA2-9DD7-89573CE4C73A\"}]}]}, {\"operator\": \"AND\", \"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:cisco:asa_5515-x_firmware:009.016\\\\(001\\\\):*:*:*:*:*:*:*\", \"matchCriteriaId\": \"9E038B73-401A-455C-851A-116EDF48243A\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:cisco:asa_5515-x_firmware:009.016\\\\(001.025\\\\):*:*:*:*:*:*:*\", \"matchCriteriaId\": \"96EDFC77-6634-4427-98F8-ACDC704F670F\"}]}, {\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": false, \"criteria\": \"cpe:2.3:h:cisco:asa_5515-x:-:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"977D597B-F6DE-4438-AB02-06BE64D71EBE\"}]}]}, {\"operator\": \"AND\", \"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:cisco:asa_5525-x_firmware:009.016\\\\(001\\\\):*:*:*:*:*:*:*\", \"matchCriteriaId\": \"29B863B0-C802-4220-984C-3D31E3DB1867\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:cisco:asa_5525-x_firmware:009.016\\\\(001.025\\\\):*:*:*:*:*:*:*\", \"matchCriteriaId\": \"AD551733-BBAE-4FE3-8E20-877084CA5E5D\"}]}, {\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": false, \"criteria\": \"cpe:2.3:h:cisco:asa_5525-x:-:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"EB71EB29-0115-4307-A9F7-262394FD9FB0\"}]}]}, {\"operator\": \"AND\", \"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:cisco:asa_5545-x_firmware:009.016\\\\(001\\\\):*:*:*:*:*:*:*\", \"matchCriteriaId\": \"5E412ECC-0C85-4F67-BF06-8DEC4D0AD9EC\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:cisco:asa_5545-x_firmware:009.016\\\\(001.025\\\\):*:*:*:*:*:*:*\", \"matchCriteriaId\": \"1819434E-FE47-4544-8BCB-D1765760E1BB\"}]}, {\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": false, \"criteria\": \"cpe:2.3:h:cisco:asa_5545-x:-:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"57179F60-E330-4FF0-9664-B1E4637FF210\"}]}]}, {\"operator\": \"AND\", \"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:cisco:asa_5555-x_firmware:009.016\\\\(001\\\\):*:*:*:*:*:*:*\", \"matchCriteriaId\": \"63BDBAD7-A0B1-4750-B29A-50941488858A\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:cisco:asa_5555-x_firmware:009.016\\\\(001.025\\\\):*:*:*:*:*:*:*\", \"matchCriteriaId\": \"FB65CEFA-1874-438A-B4F3-9DE96564D291\"}]}, {\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": false, \"criteria\": \"cpe:2.3:h:cisco:asa_5555-x:-:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"5535C936-391B-4619-AA03-B35265FC15D7\"}]}]}, {\"operator\": \"AND\", \"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:cisco:asa_5580_firmware:009.016\\\\(001\\\\):*:*:*:*:*:*:*\", \"matchCriteriaId\": \"966485AF-DBDC-4AB9-82BE-970BCCBA54F8\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:cisco:asa_5580_firmware:009.016\\\\(001.025\\\\):*:*:*:*:*:*:*\", \"matchCriteriaId\": \"4BED5416-48BE-48A4-9209-DD22BC247819\"}]}, {\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": false, \"criteria\": \"cpe:2.3:h:cisco:asa_5580:-:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"D1E828B8-5ECC-4A09-B2AD-DEDC558713DE\"}]}]}, {\"operator\": \"AND\", \"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:cisco:asa_5585-x_firmware:009.016\\\\(001\\\\):*:*:*:*:*:*:*\", \"matchCriteriaId\": \"B524ED0E-13AF-4365-A509-A4D226A6A7CF\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:cisco:asa_5585-x_firmware:009.016\\\\(001.025\\\\):*:*:*:*:*:*:*\", \"matchCriteriaId\": \"C7A8E03D-F2C3-4766-B004-961B58C172E2\"}]}, {\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": false, \"criteria\": \"cpe:2.3:h:cisco:asa_5585-x:-:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"16AE20C2-C77E-4E04-BF13-A48696E52426\"}]}]}]",
      "descriptions": "[{\"lang\": \"en\", \"value\": \"A vulnerability in the software-based SSL/TLS message handler of Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. This vulnerability is due to insufficient validation of SSL/TLS messages when the device performs software-based SSL/TLS decryption. An attacker could exploit this vulnerability by sending a crafted SSL/TLS message to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. Note: Datagram TLS (DTLS) messages cannot be used to exploit this vulnerability.\"}, {\"lang\": \"es\", \"value\": \"Una vulnerabilidad en el administrador de mensajes SSL/TLS basado en software del software Cisco Adaptive Security Appliance (ASA) y del software Firepower Threat Defense (FTD) podr\\u00eda permitir a un atacante remoto no autenticado causar la recarga de un dispositivo afectado, resultando en una condici\\u00f3n de denegaci\\u00f3n de servicio (DoS). Esta vulnerabilidad es debido a la insuficiente comprobaci\\u00f3n de los mensajes SSL/TLS cuando el dispositivo lleva a cabo el descifrado SSL/TLS basado en software. Un atacante podr\\u00eda aprovechar esta vulnerabilidad mediante el env\\u00edo de un mensaje SSL/TLS dise\\u00f1ado a un dispositivo afectado. Una explotaci\\u00f3n con \\u00e9xito podr\\u00eda permitir al atacante causar la recarga del dispositivo afectado, resultando en una condici\\u00f3n de DoS. Nota: Los mensajes TLS de datagrama (DTLS) no pueden ser usados para explotar esta vulnerabilidad\"}]",
      "id": "CVE-2021-34783",
      "lastModified": "2024-11-21T06:11:11.547",
      "metrics": "{\"cvssMetricV31\": [{\"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\", \"baseScore\": 8.6, \"baseSeverity\": \"HIGH\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"NONE\", \"scope\": \"CHANGED\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 3.9, \"impactScore\": 4.0}, {\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\", \"baseScore\": 7.5, \"baseSeverity\": \"HIGH\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 3.9, \"impactScore\": 3.6}], \"cvssMetricV2\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"2.0\", \"vectorString\": \"AV:N/AC:L/Au:N/C:N/I:N/A:C\", \"baseScore\": 7.8, \"accessVector\": \"NETWORK\", \"accessComplexity\": \"LOW\", \"authentication\": \"NONE\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"COMPLETE\"}, \"baseSeverity\": \"HIGH\", \"exploitabilityScore\": 10.0, \"impactScore\": 6.9, \"acInsufInfo\": false, \"obtainAllPrivilege\": false, \"obtainUserPrivilege\": false, \"obtainOtherPrivilege\": false, \"userInteractionRequired\": false}]}",
      "published": "2021-10-27T19:15:08.290",
      "references": "[{\"url\": \"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-tls-decrypt-dos-BMxYjm8M\", \"source\": \"ykramarz@cisco.com\", \"tags\": [\"Vendor Advisory\"]}, {\"url\": \"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-tls-decrypt-dos-BMxYjm8M\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Vendor Advisory\"]}]",
      "sourceIdentifier": "ykramarz@cisco.com",
      "vulnStatus": "Modified",
      "weaknesses": "[{\"source\": \"ykramarz@cisco.com\", \"type\": \"Secondary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-119\"}]}, {\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-20\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2021-34783\",\"sourceIdentifier\":\"psirt@cisco.com\",\"published\":\"2021-10-27T19:15:08.290\",\"lastModified\":\"2024-11-21T06:11:11.547\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A vulnerability in the software-based SSL/TLS message handler of Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. This vulnerability is due to insufficient validation of SSL/TLS messages when the device performs software-based SSL/TLS decryption. An attacker could exploit this vulnerability by sending a crafted SSL/TLS message to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. Note: Datagram TLS (DTLS) messages cannot be used to exploit this vulnerability.\"},{\"lang\":\"es\",\"value\":\"Una vulnerabilidad en el administrador de mensajes SSL/TLS basado en software del software Cisco Adaptive Security Appliance (ASA) y del software Firepower Threat Defense (FTD) podr\u00eda permitir a un atacante remoto no autenticado causar la recarga de un dispositivo afectado, resultando en una condici\u00f3n de denegaci\u00f3n de servicio (DoS). Esta vulnerabilidad es debido a la insuficiente comprobaci\u00f3n de los mensajes SSL/TLS cuando el dispositivo lleva a cabo el descifrado SSL/TLS basado en software. Un atacante podr\u00eda aprovechar esta vulnerabilidad mediante el env\u00edo de un mensaje SSL/TLS dise\u00f1ado a un dispositivo afectado. Una explotaci\u00f3n con \u00e9xito podr\u00eda permitir al atacante causar la recarga del dispositivo afectado, resultando en una condici\u00f3n de DoS. Nota: Los mensajes TLS de datagrama (DTLS) no pueden ser usados para explotar esta vulnerabilidad\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"psirt@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\",\"baseScore\":8.6,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":4.0},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":7.5,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":3.6}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:L/Au:N/C:N/I:N/A:C\",\"baseScore\":7.8,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"LOW\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"COMPLETE\"},\"baseSeverity\":\"HIGH\",\"exploitabilityScore\":10.0,\"impactScore\":6.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"psirt@cisco.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-119\"}]},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-20\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.4.0\",\"versionEndExcluding\":\"6.4.0.13\",\"matchCriteriaId\":\"17F461B5-E600-4C81-BA3C-1DBC90D4D438\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.6.0\",\"versionEndExcluding\":\"6.6.5\",\"matchCriteriaId\":\"37A74256-AF9A-473B-9DC7-A57618BA9F00\"},{\"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:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"7.0.0\",\"versionEndExcluding\":\"7.0.1\",\"matchCriteriaId\":\"7B2F537A-A488-45B6-AD4B-48B7064AE84C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"9.8.0\",\"versionEndExcluding\":\"9.8.4.40\",\"matchCriteriaId\":\"8F6EF272-6D43-476C-B35D-DDE79A7A01C5\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"9.12.0\",\"versionEndExcluding\":\"9.12.4.29\",\"matchCriteriaId\":\"B10BB7F0-1CC7-4331-A05C-3C20B0584C04\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"9.14.0\",\"versionEndExcluding\":\"9.14.3.9\",\"matchCriteriaId\":\"C6828628-B179-4188-92CE-1D488859D92D\"},{\"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\",\"matchCriteriaId\":\"25DBA8C5-EB2F-4C01-88BA-EC2D720F9F7C\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:asa_5512-x_firmware:009.016\\\\(001\\\\):*:*:*:*:*:*:*\",\"matchCriteriaId\":\"4D96435F-F035-486E-86AA-DB9A1A1878F4\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:asa_5512-x_firmware:009.016\\\\(001.025\\\\):*:*:*:*:*:*:*\",\"matchCriteriaId\":\"BEEEB3EB-7AD9-4498-BEE5-12A374AEF0FC\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:cisco:asa_5512-x:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"08F0F160-DAD2-48D4-B7B2-4818B2526F35\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:asa_5505_firmware:009.016\\\\(001\\\\):*:*:*:*:*:*:*\",\"matchCriteriaId\":\"B6AA6797-A9F7-4036-8241-F822B30C9DFB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:asa_5505_firmware:009.016\\\\(001.025\\\\):*:*:*:*:*:*:*\",\"matchCriteriaId\":\"74DF1599-7739-47DD-AD89-B9C48D1ED2EC\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:cisco:asa_5505:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"8E6A8BB7-2000-4CA2-9DD7-89573CE4C73A\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:asa_5515-x_firmware:009.016\\\\(001\\\\):*:*:*:*:*:*:*\",\"matchCriteriaId\":\"9E038B73-401A-455C-851A-116EDF48243A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:asa_5515-x_firmware:009.016\\\\(001.025\\\\):*:*:*:*:*:*:*\",\"matchCriteriaId\":\"96EDFC77-6634-4427-98F8-ACDC704F670F\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:cisco:asa_5515-x:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"977D597B-F6DE-4438-AB02-06BE64D71EBE\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:asa_5525-x_firmware:009.016\\\\(001\\\\):*:*:*:*:*:*:*\",\"matchCriteriaId\":\"29B863B0-C802-4220-984C-3D31E3DB1867\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:asa_5525-x_firmware:009.016\\\\(001.025\\\\):*:*:*:*:*:*:*\",\"matchCriteriaId\":\"AD551733-BBAE-4FE3-8E20-877084CA5E5D\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:cisco:asa_5525-x:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"EB71EB29-0115-4307-A9F7-262394FD9FB0\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:asa_5545-x_firmware:009.016\\\\(001\\\\):*:*:*:*:*:*:*\",\"matchCriteriaId\":\"5E412ECC-0C85-4F67-BF06-8DEC4D0AD9EC\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:asa_5545-x_firmware:009.016\\\\(001.025\\\\):*:*:*:*:*:*:*\",\"matchCriteriaId\":\"1819434E-FE47-4544-8BCB-D1765760E1BB\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:cisco:asa_5545-x:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"57179F60-E330-4FF0-9664-B1E4637FF210\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:asa_5555-x_firmware:009.016\\\\(001\\\\):*:*:*:*:*:*:*\",\"matchCriteriaId\":\"63BDBAD7-A0B1-4750-B29A-50941488858A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:asa_5555-x_firmware:009.016\\\\(001.025\\\\):*:*:*:*:*:*:*\",\"matchCriteriaId\":\"FB65CEFA-1874-438A-B4F3-9DE96564D291\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:cisco:asa_5555-x:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"5535C936-391B-4619-AA03-B35265FC15D7\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:asa_5580_firmware:009.016\\\\(001\\\\):*:*:*:*:*:*:*\",\"matchCriteriaId\":\"966485AF-DBDC-4AB9-82BE-970BCCBA54F8\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:asa_5580_firmware:009.016\\\\(001.025\\\\):*:*:*:*:*:*:*\",\"matchCriteriaId\":\"4BED5416-48BE-48A4-9209-DD22BC247819\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:cisco:asa_5580:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"D1E828B8-5ECC-4A09-B2AD-DEDC558713DE\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:asa_5585-x_firmware:009.016\\\\(001\\\\):*:*:*:*:*:*:*\",\"matchCriteriaId\":\"B524ED0E-13AF-4365-A509-A4D226A6A7CF\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:asa_5585-x_firmware:009.016\\\\(001.025\\\\):*:*:*:*:*:*:*\",\"matchCriteriaId\":\"C7A8E03D-F2C3-4766-B004-961B58C172E2\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:cisco:asa_5585-x:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"16AE20C2-C77E-4E04-BF13-A48696E52426\"}]}]}],\"references\":[{\"url\":\"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-tls-decrypt-dos-BMxYjm8M\",\"source\":\"psirt@cisco.com\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-tls-decrypt-dos-BMxYjm8M\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Vendor Advisory\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-tls-decrypt-dos-BMxYjm8M\", \"name\": \"20211027 Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Software-Based SSL/TLS Denial of Service Vulnerability\", \"tags\": [\"vendor-advisory\", \"x_refsource_CISCO\", \"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-04T00:19:48.253Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-34783\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-11-07T21:44:32.072886Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-11-07T21:44:59.363Z\"}}], \"cna\": {\"title\": \"Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Software-Based SSL/TLS Denial of Service Vulnerability\", \"source\": {\"defect\": [[\"CSCvy55054\"]], \"advisory\": \"cisco-sa-ftd-tls-decrypt-dos-BMxYjm8M\", \"discovery\": \"INTERNAL\"}, \"metrics\": [{\"cvssV3_1\": {\"scope\": \"CHANGED\", \"version\": \"3.1\", \"baseScore\": 8.6, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}], \"affected\": [{\"vendor\": \"Cisco\", \"product\": \"Cisco Adaptive Security Appliance (ASA) Software\", \"versions\": [{\"status\": \"affected\", \"version\": \"n/a\"}]}], \"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.\"}], \"datePublic\": \"2021-10-27T00:00:00\", \"references\": [{\"url\": \"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-tls-decrypt-dos-BMxYjm8M\", \"name\": \"20211027 Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Software-Based SSL/TLS Denial of Service Vulnerability\", \"tags\": [\"vendor-advisory\", \"x_refsource_CISCO\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"A vulnerability in the software-based SSL/TLS message handler of Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. This vulnerability is due to insufficient validation of SSL/TLS messages when the device performs software-based SSL/TLS decryption. An attacker could exploit this vulnerability by sending a crafted SSL/TLS message to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. Note: Datagram TLS (DTLS) messages cannot be used to exploit this vulnerability.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-119\", \"description\": \"CWE-119\"}]}], \"providerMetadata\": {\"orgId\": \"d1c1063e-7a18-46af-9102-31f8928bc633\", \"shortName\": \"cisco\", \"dateUpdated\": \"2021-10-27T18:55:57\"}, \"x_legacyV4Record\": {\"impact\": {\"cvss\": {\"version\": \"3.0\", \"baseScore\": \"8.6\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H\"}}, \"source\": {\"defect\": [[\"CSCvy55054\"]], \"advisory\": \"cisco-sa-ftd-tls-decrypt-dos-BMxYjm8M\", \"discovery\": \"INTERNAL\"}, \"affects\": {\"vendor\": {\"vendor_data\": [{\"product\": {\"product_data\": [{\"version\": {\"version_data\": [{\"version_value\": \"n/a\"}]}, \"product_name\": \"Cisco Adaptive Security Appliance (ASA) Software\"}]}, \"vendor_name\": \"Cisco\"}]}}, \"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.\"}], \"data_type\": \"CVE\", \"references\": {\"reference_data\": [{\"url\": \"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-tls-decrypt-dos-BMxYjm8M\", \"name\": \"20211027 Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Software-Based SSL/TLS Denial of Service Vulnerability\", \"refsource\": \"CISCO\"}]}, \"data_format\": \"MITRE\", \"description\": {\"description_data\": [{\"lang\": \"eng\", \"value\": \"A vulnerability in the software-based SSL/TLS message handler of Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. This vulnerability is due to insufficient validation of SSL/TLS messages when the device performs software-based SSL/TLS decryption. An attacker could exploit this vulnerability by sending a crafted SSL/TLS message to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. Note: Datagram TLS (DTLS) messages cannot be used to exploit this vulnerability.\"}]}, \"problemtype\": {\"problemtype_data\": [{\"description\": [{\"lang\": \"eng\", \"value\": \"CWE-119\"}]}]}, \"data_version\": \"4.0\", \"CVE_data_meta\": {\"ID\": \"CVE-2021-34783\", \"STATE\": \"PUBLIC\", \"TITLE\": \"Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Software-Based SSL/TLS Denial of Service Vulnerability\", \"ASSIGNER\": \"psirt@cisco.com\", \"DATE_PUBLIC\": \"2021-10-27T16:00:00\"}}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-34783\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-11-07T21:46:04.938Z\", \"dateReserved\": \"2021-06-15T00:00:00\", \"assignerOrgId\": \"d1c1063e-7a18-46af-9102-31f8928bc633\", \"datePublished\": \"2021-10-27T18:55:57.640344Z\", \"assignerShortName\": \"cisco\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


Log in or create an account to share your comment.




Tags
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.