CVE-2019-1981 (GCVE-0-2019-1981)

Vulnerability from cvelistv5 – Published: 2019-11-05 19:35 – Updated: 2024-11-19 18:52
VLAI?
Summary
A vulnerability in the normalization functionality of Cisco Firepower Threat Defense Software, Cisco FirePOWER Services Software for ASA, and Cisco Firepower Management Center Software could allow an unauthenticated, remote attacker to bypass filtering protections. The vulnerability is due to insufficient normalization of a text-based payload. An attacker could exploit this vulnerability by sending traffic that contains specifically obfuscated payloads through an affected device. An exploit could allow the attacker to bypass filtering and deliver malicious payloads to protected systems that would otherwise be blocked.
Severity ?
5.8 (Medium)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
CWE
Assigner
References
https://tools.cisco.com/security/center/content/C… vendor-advisoryx_refsource_CISCO
Impacted products
Vendor Product Version
Cisco Cisco Firepower Threat Defense Software Affected: unspecified , < n/a (custom)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T18:35:52.366Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "name": "20190816 Cisco Firepower Threat Defense Software NULL Character Obfuscation Detection Bypass Vulnerability",
            "tags": [
              "vendor-advisory",
              "x_refsource_CISCO",
              "x_transferred"
            ],
            "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190816-ftd-null"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2019-1981",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-11-19T17:22:28.026981Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-11-19T18:52:01.647Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Cisco Firepower Threat Defense Software",
          "vendor": "Cisco",
          "versions": [
            {
              "lessThan": "n/a",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        }
      ],
      "datePublic": "2019-08-16T00:00:00",
      "descriptions": [
        {
          "lang": "en",
          "value": "A vulnerability in the normalization functionality of Cisco Firepower Threat Defense Software, Cisco FirePOWER Services Software for ASA, and Cisco Firepower Management Center Software could allow an unauthenticated, remote attacker to bypass filtering protections. The vulnerability is due to insufficient normalization of a text-based payload. An attacker could exploit this vulnerability by sending traffic that contains specifically obfuscated payloads through an affected device. An exploit could allow the attacker to bypass filtering and deliver malicious payloads to protected systems that would otherwise be blocked."
        }
      ],
      "exploits": [
        {
          "lang": "en",
          "value": "The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory."
        }
      ],
      "metrics": [
        {
          "cvssV3_0": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.8,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N",
            "version": "3.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-264",
              "description": "CWE-264",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2019-11-05T19:35:41",
        "orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
        "shortName": "cisco"
      },
      "references": [
        {
          "name": "20190816 Cisco Firepower Threat Defense Software NULL Character Obfuscation Detection Bypass Vulnerability",
          "tags": [
            "vendor-advisory",
            "x_refsource_CISCO"
          ],
          "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190816-ftd-null"
        }
      ],
      "source": {
        "advisory": "cisco-sa-20190816-ftd-null",
        "defect": [
          [
            "CSCvq39915"
          ]
        ],
        "discovery": "INTERNAL"
      },
      "title": "Cisco Firepower Threat Defense Software NULL Character Obfuscation Detection Bypass Vulnerability",
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "psirt@cisco.com",
          "DATE_PUBLIC": "2019-08-16T16:00:00-0700",
          "ID": "CVE-2019-1981",
          "STATE": "PUBLIC",
          "TITLE": "Cisco Firepower Threat Defense Software NULL Character Obfuscation Detection Bypass Vulnerability"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "Cisco Firepower Threat Defense Software",
                      "version": {
                        "version_data": [
                          {
                            "affected": "\u003c",
                            "version_affected": "\u003c",
                            "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 normalization functionality of Cisco Firepower Threat Defense Software, Cisco FirePOWER Services Software for ASA, and Cisco Firepower Management Center Software could allow an unauthenticated, remote attacker to bypass filtering protections. The vulnerability is due to insufficient normalization of a text-based payload. An attacker could exploit this vulnerability by sending traffic that contains specifically obfuscated payloads through an affected device. An exploit could allow the attacker to bypass filtering and deliver malicious payloads to protected systems that would otherwise be blocked."
            }
          ]
        },
        "exploit": [
          {
            "lang": "en",
            "value": "The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory."
          }
        ],
        "impact": {
          "cvss": {
            "baseScore": "5.8",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N",
            "version": "3.0"
          }
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-264"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "20190816 Cisco Firepower Threat Defense Software NULL Character Obfuscation Detection Bypass Vulnerability",
              "refsource": "CISCO",
              "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190816-ftd-null"
            }
          ]
        },
        "source": {
          "advisory": "cisco-sa-20190816-ftd-null",
          "defect": [
            [
              "CSCvq39915"
            ]
          ],
          "discovery": "INTERNAL"
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
    "assignerShortName": "cisco",
    "cveId": "CVE-2019-1981",
    "datePublished": "2019-11-05T19:35:41.940103Z",
    "dateReserved": "2018-12-06T00:00:00",
    "dateUpdated": "2024-11-19T18:52:01.647Z",
    "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_services_software_for_asa:*:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"0A70505F-E716-439B-BE8C-B4CC3DF080E7\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"E102D5C4-D296-4F09-B4FA-62CD8E2E5CB1\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:cisco:secure_firewall_management_center:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"2.9.12\", \"versionEndIncluding\": \"2.9.12.15\", \"matchCriteriaId\": \"0BD5CFAE-5696-419C-B24E-7CF9E7EC7B92\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:cisco:secure_firewall_management_center:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"2.9.13\", \"versionEndIncluding\": \"2.9.13.6\", \"matchCriteriaId\": \"27A4DC81-DD37-46A6-8751-D0B4671E23BA\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:cisco:secure_firewall_management_center:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"2.9.14.0\", \"versionEndIncluding\": \"2.9.14.5\", \"matchCriteriaId\": \"C37F0EAC-42D5-4D10-A5C8-6D975B7BF176\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:cisco:secure_firewall_management_center:2.9.15:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"42493B4F-0CF2-45F0-B72D-36F0597CC274\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:cisco:secure_firewall_management_center:2.9.16:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"06F2E7D8-BB95-480D-AE3E-F9B97C3A5379\"}]}]}]",
      "descriptions": "[{\"lang\": \"en\", \"value\": \"A vulnerability in the normalization functionality of Cisco Firepower Threat Defense Software, Cisco FirePOWER Services Software for ASA, and Cisco Firepower Management Center Software could allow an unauthenticated, remote attacker to bypass filtering protections. The vulnerability is due to insufficient normalization of a text-based payload. An attacker could exploit this vulnerability by sending traffic that contains specifically obfuscated payloads through an affected device. An exploit could allow the attacker to bypass filtering and deliver malicious payloads to protected systems that would otherwise be blocked.\"}, {\"lang\": \"es\", \"value\": \"Una vulnerabilidad en la funcionalidad de normalizaci\\u00f3n del software Cisco Firepower Threat Defense, el software Cisco FirePOWER Services para ASA y el software Cisco Firepower Management Center, podr\\u00eda permitir a un atacante remoto no autenticado omitir las protecciones de filtrado. La vulnerabilidad es debido a la insuficiente normalizaci\\u00f3n de una carga \\u00fatil basada en texto. Un atacante podr\\u00eda explotar esta vulnerabilidad mediante el env\\u00edo de tr\\u00e1fico que contenga cargas \\u00fatiles especialmente ofuscadas por medio de un dispositivo afectado. Una explotaci\\u00f3n podr\\u00eda permitir al atacante evitar el filtrado y entregar cargas maliciosas hacia los sistemas protegidos que de otra manera se bloquear\\u00edan.\"}]",
      "id": "CVE-2019-1981",
      "lastModified": "2024-11-26T16:09:02.407",
      "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:L/A:N\", \"baseScore\": 5.8, \"baseSeverity\": \"MEDIUM\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"NONE\", \"scope\": \"CHANGED\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"LOW\", \"availabilityImpact\": \"NONE\"}, \"exploitabilityScore\": 3.9, \"impactScore\": 1.4}], \"cvssMetricV30\": [{\"source\": \"ykramarz@cisco.com\", \"type\": \"Secondary\", \"cvssData\": {\"version\": \"3.0\", \"vectorString\": \"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N\", \"baseScore\": 5.8, \"baseSeverity\": \"MEDIUM\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"NONE\", \"scope\": \"CHANGED\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"LOW\", \"availabilityImpact\": \"NONE\"}, \"exploitabilityScore\": 3.9, \"impactScore\": 1.4}], \"cvssMetricV2\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"2.0\", \"vectorString\": \"AV:N/AC:L/Au:N/C:N/I:P/A:N\", \"baseScore\": 5.0, \"accessVector\": \"NETWORK\", \"accessComplexity\": \"LOW\", \"authentication\": \"NONE\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"PARTIAL\", \"availabilityImpact\": \"NONE\"}, \"baseSeverity\": \"MEDIUM\", \"exploitabilityScore\": 10.0, \"impactScore\": 2.9, \"acInsufInfo\": false, \"obtainAllPrivilege\": false, \"obtainUserPrivilege\": false, \"obtainOtherPrivilege\": false, \"userInteractionRequired\": false}]}",
      "published": "2019-11-05T20:15:11.783",
      "references": "[{\"url\": \"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190816-ftd-null\", \"source\": \"ykramarz@cisco.com\", \"tags\": [\"Vendor Advisory\"]}, {\"url\": \"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190816-ftd-null\", \"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-264\"}]}, {\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-20\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2019-1981\",\"sourceIdentifier\":\"psirt@cisco.com\",\"published\":\"2019-11-05T20:15:11.783\",\"lastModified\":\"2024-11-26T16:09:02.407\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A vulnerability in the normalization functionality of Cisco Firepower Threat Defense Software, Cisco FirePOWER Services Software for ASA, and Cisco Firepower Management Center Software could allow an unauthenticated, remote attacker to bypass filtering protections. The vulnerability is due to insufficient normalization of a text-based payload. An attacker could exploit this vulnerability by sending traffic that contains specifically obfuscated payloads through an affected device. An exploit could allow the attacker to bypass filtering and deliver malicious payloads to protected systems that would otherwise be blocked.\"},{\"lang\":\"es\",\"value\":\"Una vulnerabilidad en la funcionalidad de normalizaci\u00f3n del software Cisco Firepower Threat Defense, el software Cisco FirePOWER Services para ASA y el software Cisco Firepower Management Center, podr\u00eda permitir a un atacante remoto no autenticado omitir las protecciones de filtrado. La vulnerabilidad es debido a la insuficiente normalizaci\u00f3n de una carga \u00fatil basada en texto. Un atacante podr\u00eda explotar esta vulnerabilidad mediante el env\u00edo de tr\u00e1fico que contenga cargas \u00fatiles especialmente ofuscadas por medio de un dispositivo afectado. Una explotaci\u00f3n podr\u00eda permitir al atacante evitar el filtrado y entregar cargas maliciosas hacia los sistemas protegidos que de otra manera se bloquear\u00edan.\"}],\"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:L/A:N\",\"baseScore\":5.8,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.9,\"impactScore\":1.4}],\"cvssMetricV30\":[{\"source\":\"psirt@cisco.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.0\",\"vectorString\":\"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N\",\"baseScore\":5.8,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.9,\"impactScore\":1.4}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:L/Au:N/C:N/I:P/A:N\",\"baseScore\":5.0,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"LOW\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"PARTIAL\",\"availabilityImpact\":\"NONE\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":10.0,\"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-264\"}]},{\"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_services_software_for_asa:*:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"0A70505F-E716-439B-BE8C-B4CC3DF080E7\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"E102D5C4-D296-4F09-B4FA-62CD8E2E5CB1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cisco:secure_firewall_management_center:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"2.9.12\",\"versionEndIncluding\":\"2.9.12.15\",\"matchCriteriaId\":\"0BD5CFAE-5696-419C-B24E-7CF9E7EC7B92\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cisco:secure_firewall_management_center:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"2.9.13\",\"versionEndIncluding\":\"2.9.13.6\",\"matchCriteriaId\":\"27A4DC81-DD37-46A6-8751-D0B4671E23BA\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cisco:secure_firewall_management_center:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"2.9.14.0\",\"versionEndIncluding\":\"2.9.14.5\",\"matchCriteriaId\":\"C37F0EAC-42D5-4D10-A5C8-6D975B7BF176\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cisco:secure_firewall_management_center:2.9.15:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"42493B4F-0CF2-45F0-B72D-36F0597CC274\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cisco:secure_firewall_management_center:2.9.16:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"06F2E7D8-BB95-480D-AE3E-F9B97C3A5379\"}]}]}],\"references\":[{\"url\":\"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190816-ftd-null\",\"source\":\"psirt@cisco.com\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190816-ftd-null\",\"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-20190816-ftd-null\", \"name\": \"20190816 Cisco Firepower Threat Defense Software NULL Character Obfuscation Detection Bypass Vulnerability\", \"tags\": [\"vendor-advisory\", \"x_refsource_CISCO\", \"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-04T18:35:52.366Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2019-1981\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-11-19T17:22:28.026981Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-11-19T17:22:55.991Z\"}}], \"cna\": {\"title\": \"Cisco Firepower Threat Defense Software NULL Character Obfuscation Detection Bypass Vulnerability\", \"source\": {\"defect\": [[\"CSCvq39915\"]], \"advisory\": \"cisco-sa-20190816-ftd-null\", \"discovery\": \"INTERNAL\"}, \"metrics\": [{\"cvssV3_0\": {\"scope\": \"CHANGED\", \"version\": \"3.0\", \"baseScore\": 5.8, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N\", \"integrityImpact\": \"LOW\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}], \"affected\": [{\"vendor\": \"Cisco\", \"product\": \"Cisco Firepower Threat Defense Software\", \"versions\": [{\"status\": \"affected\", \"version\": \"unspecified\", \"lessThan\": \"n/a\", \"versionType\": \"custom\"}]}], \"exploits\": [{\"lang\": \"en\", \"value\": \"The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.\"}], \"datePublic\": \"2019-08-16T00:00:00\", \"references\": [{\"url\": \"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190816-ftd-null\", \"name\": \"20190816 Cisco Firepower Threat Defense Software NULL Character Obfuscation Detection Bypass Vulnerability\", \"tags\": [\"vendor-advisory\", \"x_refsource_CISCO\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"A vulnerability in the normalization functionality of Cisco Firepower Threat Defense Software, Cisco FirePOWER Services Software for ASA, and Cisco Firepower Management Center Software could allow an unauthenticated, remote attacker to bypass filtering protections. The vulnerability is due to insufficient normalization of a text-based payload. An attacker could exploit this vulnerability by sending traffic that contains specifically obfuscated payloads through an affected device. An exploit could allow the attacker to bypass filtering and deliver malicious payloads to protected systems that would otherwise be blocked.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-264\", \"description\": \"CWE-264\"}]}], \"providerMetadata\": {\"orgId\": \"d1c1063e-7a18-46af-9102-31f8928bc633\", \"shortName\": \"cisco\", \"dateUpdated\": \"2019-11-05T19:35:41\"}, \"x_legacyV4Record\": {\"impact\": {\"cvss\": {\"version\": \"3.0\", \"baseScore\": \"5.8\", \"vectorString\": \"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N\"}}, \"source\": {\"defect\": [[\"CSCvq39915\"]], \"advisory\": \"cisco-sa-20190816-ftd-null\", \"discovery\": \"INTERNAL\"}, \"affects\": {\"vendor\": {\"vendor_data\": [{\"product\": {\"product_data\": [{\"version\": {\"version_data\": [{\"affected\": \"\u003c\", \"version_value\": \"n/a\", \"version_affected\": \"\u003c\"}]}, \"product_name\": \"Cisco Firepower Threat Defense Software\"}]}, \"vendor_name\": \"Cisco\"}]}}, \"exploit\": [{\"lang\": \"en\", \"value\": \"The Cisco Product Security Incident Response Team (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-20190816-ftd-null\", \"name\": \"20190816 Cisco Firepower Threat Defense Software NULL Character Obfuscation Detection Bypass Vulnerability\", \"refsource\": \"CISCO\"}]}, \"data_format\": \"MITRE\", \"description\": {\"description_data\": [{\"lang\": \"eng\", \"value\": \"A vulnerability in the normalization functionality of Cisco Firepower Threat Defense Software, Cisco FirePOWER Services Software for ASA, and Cisco Firepower Management Center Software could allow an unauthenticated, remote attacker to bypass filtering protections. The vulnerability is due to insufficient normalization of a text-based payload. An attacker could exploit this vulnerability by sending traffic that contains specifically obfuscated payloads through an affected device. An exploit could allow the attacker to bypass filtering and deliver malicious payloads to protected systems that would otherwise be blocked.\"}]}, \"problemtype\": {\"problemtype_data\": [{\"description\": [{\"lang\": \"eng\", \"value\": \"CWE-264\"}]}]}, \"data_version\": \"4.0\", \"CVE_data_meta\": {\"ID\": \"CVE-2019-1981\", \"STATE\": \"PUBLIC\", \"TITLE\": \"Cisco Firepower Threat Defense Software NULL Character Obfuscation Detection Bypass Vulnerability\", \"ASSIGNER\": \"psirt@cisco.com\", \"DATE_PUBLIC\": \"2019-08-16T16:00:00-0700\"}}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2019-1981\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-11-19T18:52:01.647Z\", \"dateReserved\": \"2018-12-06T00:00:00\", \"assignerOrgId\": \"d1c1063e-7a18-46af-9102-31f8928bc633\", \"datePublished\": \"2019-11-05T19:35:41.940103Z\", \"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.