{
  "document": {
    "acknowledgments": [
      {
        "summary": "This vulnerability was found by Brandon Sakai of Cisco during internal security testing."
      }
    ],
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "notes": [
      {
        "category": "summary",
        "text": "A vulnerability in Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, local attacker to overwrite or append arbitrary data to system files using root-level privileges. The attacker must have administrative credentials on the device.\r\n\r\nThis vulnerability is due to incomplete validation of user input for a specific CLI command. An attacker could exploit this vulnerability by authenticating to the device with administrative privileges and issuing a CLI command with crafted user parameters. A successful exploit could allow the attacker to overwrite or append arbitrary data to system files using root-level privileges.\r\n\r\nCisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.\r\n\r\n\r\n\r\nThis advisory is part of the October 2021 release of the Cisco ASA, FTD, and FMC Security Advisory Bundled publication. For a complete list of the advisories and links to them, see Cisco Event Response: October 2021 Cisco ASA, FMC, and FTD Software Security Advisory Bundled Publication [\"https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-74773\"].",
        "title": "Summary"
      },
      {
        "category": "general",
        "text": "At the time of publication, this vulnerability affected Cisco FTD Software.\r\n\r\nNote: The default configuration is vulnerable.\r\n\r\nFor information about which Cisco software releases were vulnerable at the time of publication, see the Fixed Software [\"#fs\"] section of this advisory. See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information.",
        "title": "Vulnerable Products"
      },
      {
        "category": "general",
        "text": "Only products listed in the Vulnerable Products [\"#vp\"] section of this advisory are known to be affected by this vulnerability.\r\n\r\nCisco has confirmed that this vulnerability does not affect Cisco Adaptive Security Appliance (ASA) Software or Cisco Firepower Management Center (FMC) Software.",
        "title": "Products Confirmed Not Vulnerable"
      },
      {
        "category": "general",
        "text": "There are no workarounds that address this vulnerability.",
        "title": "Workarounds"
      },
      {
        "category": "general",
        "text": "When considering software upgrades [\"https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html#fixes\"], customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories page [\"https://www.cisco.com/go/psirt\"], to determine exposure and a complete upgrade solution.\r\n\r\nIn all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers.\r\n      Fixed Releases\r\nAt the time of publication, the release information in the following table(s) was accurate. See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information.\r\n\r\nThe left column lists Cisco software releases, and the right column indicates whether a release was affected by the vulnerability described in this advisory and which release included the fix for this vulnerability.\r\n\r\nFTD Software\r\n        Cisco FTD Software Release  First Fixed Release for This Vulnerability          6.2.2 and earlier1  Migrate to a fixed release.      6.2.3  Migrate to a fixed release.      6.3.01  Migrate to a fixed release.      6.4.0  6.4.0.13      6.5.01  Migrate to a fixed release.      6.6.0  6.6.5      6.7.0  6.7.0.3      7.0.0  7.0.1      7.1.0  Migrate to a fixed release.      7.2.0 and later  7.2.0.1\r\n1. Cisco FMC and FTD Software releases 6.2.2 and earlier, as well as releases 6.3.0 and 6.5.0, have reached end of software maintenance [\"https://www.cisco.com/c/en/us/products/eos-eol-listing.html\"]. Customers are advised to migrate to a supported release that includes the fix for this vulnerability.\r\n\r\nFor instructions on upgrading your FTD device, see Cisco Firepower Management Center Upgrade Guide [\"https://www.cisco.com/c/en/us/td/docs/security/firepower/upgrade/fpmc-upgrade-guide/getting_started.html\"].\r\n\r\nThe Cisco Product Security Incident Response Team (PSIRT) validates only the affected and fixed release information that is documented in this advisory.",
        "title": "Fixed Software"
      },
      {
        "category": "general",
        "text": "To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy [\"http://www.cisco.com/web/about/security/psirt/security_vulnerability_policy.html\"]. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.",
        "title": "Vulnerability Policy"
      },
      {
        "category": "general",
        "text": "The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.",
        "title": "Exploitation and Public Announcements"
      },
      {
        "category": "general",
        "text": "This vulnerability was found by Brandon Sakai of Cisco during internal security testing.",
        "title": "Source"
      },
      {
        "category": "legal_disclaimer",
        "text": "THIS DOCUMENT IS PROVIDED ON AN \"AS IS\" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.\r\n\r\nA standalone copy or paraphrase of the text of this document that omits the distribution URL is an uncontrolled copy and may lack important information or contain factual errors. The information in this document is intended for end users of Cisco products.",
        "title": "Legal Disclaimer"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "psirt@cisco.com",
      "issuing_authority": "Cisco PSIRT",
      "name": "Cisco",
      "namespace": "https://wwww.cisco.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "Cisco Firepower Threat Defense Software CLI Arbitrary File Write Vulnerability",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-file-write-SHVcmQVc"
      },
      {
        "category": "external",
        "summary": "Cisco Event Response: October 2021 Cisco ASA, FMC, and FTD Software Security Advisory Bundled Publication",
        "url": "https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-74773"
      },
      {
        "category": "external",
        "summary": "Cisco Security Vulnerability Policy",
        "url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html"
      },
      {
        "category": "external",
        "summary": "considering software upgrades",
        "url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html#fixes"
      },
      {
        "category": "external",
        "summary": "Cisco\u0026nbsp;Security Advisories page",
        "url": "https://www.cisco.com/go/psirt"
      },
      {
        "category": "external",
        "summary": "end of software maintenance",
        "url": "https://www.cisco.com/c/en/us/products/eos-eol-listing.html"
      },
      {
        "category": "external",
        "summary": "Cisco\u0026nbsp;Firepower Management Center Upgrade Guide",
        "url": "https://www.cisco.com/c/en/us/td/docs/security/firepower/upgrade/fpmc-upgrade-guide/getting_started.html"
      },
      {
        "category": "external",
        "summary": "Security Vulnerability Policy",
        "url": "http://www.cisco.com/web/about/security/psirt/security_vulnerability_policy.html"
      }
    ],
    "title": "Cisco Firepower Threat Defense Software CLI Arbitrary File Write Vulnerability",
    "tracking": {
      "current_release_date": "2023-05-26T11:54:17+00:00",
      "generator": {
        "date": "2024-05-10T23:11:16+00:00",
        "engine": {
          "name": "TVCE"
        }
      },
      "id": "cisco-sa-ftd-file-write-SHVcmQVc",
      "initial_release_date": "2021-10-27T16:00:00+00:00",
      "revision_history": [
        {
          "date": "2021-10-27T15:39:37+00:00",
          "number": "1.0.0",
          "summary": "Initial public release."
        },
        {
          "date": "2023-05-26T11:54:17+00:00",
          "number": "1.1.0",
          "summary": "Updated fixed releases and Cisco Bug IDs."
        }
      ],
      "status": "final",
      "version": "1.1.0"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "branches": [
                  {
                    "category": "service_pack",
                    "name": "6.2.3.4",
                    "product": {
                      "name": "6.2.3.4",
                      "product_id": "CSAFPID-247893"
                    }
                  },
                  {
                    "category": "service_pack",
                    "name": "6.2.3.8",
                    "product": {
                      "name": "6.2.3.8",
                      "product_id": "CSAFPID-251757"
                    }
                  },
                  {
                    "category": "service_pack",
                    "name": "6.2.3.13",
                    "product": {
                      "name": "6.2.3.13",
                      "product_id": "CSAFPID-267675"
                    }
                  },
                  {
                    "category": "service_pack",
                    "name": "6.2.3.16",
                    "product": {
                      "name": "6.2.3.16",
                      "product_id": "CSAFPID-278503"
                    }
                  }
                ],
                "category": "product_version",
                "name": "6.2"
              },
              {
                "branches": [
                  {
                    "category": "service_pack",
                    "name": "6.6.0",
                    "product": {
                      "name": "6.6.0",
                      "product_id": "CSAFPID-225862"
                    }
                  },
                  {
                    "category": "service_pack",
                    "name": "6.6.0.1",
                    "product": {
                      "name": "6.6.0.1",
                      "product_id": "CSAFPID-278885"
                    }
                  },
                  {
                    "category": "service_pack",
                    "name": "6.6.4",
                    "product": {
                      "name": "6.6.4",
                      "product_id": "CSAFPID-282174"
                    }
                  }
                ],
                "category": "product_version",
                "name": "6.6"
              }
            ],
            "category": "product_family",
            "name": "Cisco Firepower Threat Defense Software"
          },
          {
            "category": "product_name",
            "name": "Cisco Firepower 2100 Series",
            "product": {
              "name": "Cisco Firepower 2100 Series",
              "product_id": "CSAFPID-277392"
            }
          },
          {
            "category": "product_name",
            "name": "Cisco Firepower 1000 Series",
            "product": {
              "name": "Cisco Firepower 1000 Series",
              "product_id": "CSAFPID-277393"
            }
          },
          {
            "category": "product_name",
            "name": "Cisco ASA 5500-X Series Firewalls",
            "product": {
              "name": "Cisco ASA 5500-X Series Firewalls",
              "product_id": "CSAFPID-277437"
            }
          },
          {
            "category": "product_name",
            "name": "Cisco 3000 Series Industrial Security Appliances (ISA)",
            "product": {
              "name": "Cisco 3000 Series Industrial Security Appliances (ISA)",
              "product_id": "CSAFPID-277438"
            }
          },
          {
            "category": "product_name",
            "name": "Cisco Firepower 4100 Series",
            "product": {
              "name": "Cisco Firepower 4100 Series",
              "product_id": "CSAFPID-277441"
            }
          },
          {
            "category": "product_name",
            "name": "Cisco Secure Firewall Threat Defense Virtual",
            "product": {
              "name": "Cisco Secure Firewall Threat Defense Virtual",
              "product_id": "CSAFPID-277464"
            }
          }
        ],
        "category": "vendor",
        "name": "Cisco"
      }
    ],
    "relationships": [
      {
        "category": "installed_on",
        "full_product_name": {
          "name": "Cisco Firepower Threat Defense Software 6.2.3.4 when installed on Cisco 3000 Series Industrial Security Appliances (ISA)",
          "product_id": "CSAFPID-247893:277438"
        },
        "product_reference": "CSAFPID-247893",
        "relates_to_product_reference": "CSAFPID-277438"
      },
      {
        "category": "installed_on",
        "full_product_name": {
          "name": "Cisco Firepower Threat Defense Software 6.2.3.8 when installed on Cisco Firepower 2100 Series",
          "product_id": "CSAFPID-251757:277392"
        },
        "product_reference": "CSAFPID-251757",
        "relates_to_product_reference": "CSAFPID-277392"
      },
      {
        "category": "installed_on",
        "full_product_name": {
          "name": "Cisco Firepower Threat Defense Software 6.2.3.13 when installed on Cisco 3000 Series Industrial Security Appliances (ISA)",
          "product_id": "CSAFPID-267675:277438"
        },
        "product_reference": "CSAFPID-267675",
        "relates_to_product_reference": "CSAFPID-277438"
      },
      {
        "category": "installed_on",
        "full_product_name": {
          "name": "Cisco Firepower Threat Defense Software 6.2.3.16 when installed on Cisco Secure Firewall Threat Defense Virtual",
          "product_id": "CSAFPID-278503:277464"
        },
        "product_reference": "CSAFPID-278503",
        "relates_to_product_reference": "CSAFPID-277464"
      },
      {
        "category": "installed_on",
        "full_product_name": {
          "name": "Cisco Firepower Threat Defense Software 6.6.0 when installed on Cisco Firepower 1000 Series",
          "product_id": "CSAFPID-225862:277393"
        },
        "product_reference": "CSAFPID-225862",
        "relates_to_product_reference": "CSAFPID-277393"
      },
      {
        "category": "installed_on",
        "full_product_name": {
          "name": "Cisco Firepower Threat Defense Software 6.6.0 when installed on Cisco Firepower 4100 Series",
          "product_id": "CSAFPID-225862:277441"
        },
        "product_reference": "CSAFPID-225862",
        "relates_to_product_reference": "CSAFPID-277441"
      },
      {
        "category": "installed_on",
        "full_product_name": {
          "name": "Cisco Firepower Threat Defense Software 6.6.0.1 when installed on Cisco ASA 5500-X Series Firewalls",
          "product_id": "CSAFPID-278885:277437"
        },
        "product_reference": "CSAFPID-278885",
        "relates_to_product_reference": "CSAFPID-277437"
      },
      {
        "category": "installed_on",
        "full_product_name": {
          "name": "Cisco Firepower Threat Defense Software 6.6.4 when installed on Cisco ASA 5500-X Series Firewalls",
          "product_id": "CSAFPID-282174:277437"
        },
        "product_reference": "CSAFPID-282174",
        "relates_to_product_reference": "CSAFPID-277437"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2021-34761",
      "ids": [
        {
          "system_name": "Cisco Bug ID",
          "text": "CSCvy41757"
        },
        {
          "system_name": "Cisco Bug ID",
          "text": "CSCwb27153"
        },
        {
          "system_name": "Cisco Bug ID",
          "text": "CSCwc83308"
        }
      ],
      "notes": [
        {
          "category": "other",
          "text": "Complete.",
          "title": "Affected Product Comprehensiveness"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-225862:277393",
          "CSAFPID-225862:277441",
          "CSAFPID-247893:277438",
          "CSAFPID-251757:277392",
          "CSAFPID-267675:277438",
          "CSAFPID-278503:277464",
          "CSAFPID-278885:277437",
          "CSAFPID-282174:277437"
        ]
      },
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Cisco has released software updates that address this vulnerability.",
          "product_ids": [
            "CSAFPID-225862:277393",
            "CSAFPID-225862:277441",
            "CSAFPID-247893:277438",
            "CSAFPID-251757:277392",
            "CSAFPID-267675:277438",
            "CSAFPID-278503:277464",
            "CSAFPID-278885:277437",
            "CSAFPID-282174:277437"
          ],
          "url": "https://software.cisco.com"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 4.4,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-225862:277393",
            "CSAFPID-225862:277441",
            "CSAFPID-247893:277438",
            "CSAFPID-251757:277392",
            "CSAFPID-267675:277438",
            "CSAFPID-278503:277464",
            "CSAFPID-278885:277437",
            "CSAFPID-282174:277437"
          ]
        }
      ],
      "title": "Cisco Firepower Threat Defense CLI Arbitrary File Write Vulnerability"
    }
  ]
}