{
  "document": {
    "acknowledgments": [
      {
        "summary": "This vulnerability was found during the resolution of a Cisco TAC support case."
      }
    ],
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "notes": [
      {
        "category": "summary",
        "text": "A vulnerability in ConfD could allow an authenticated, local attacker to execute arbitrary commands at the level of the account under which ConfD is running, which is commonly root. To exploit this vulnerability, an attacker must have a valid account on the affected device.\r\n\r\nThe vulnerability exists because the affected software incorrectly runs the SFTP user service at the privilege level of the account that was running when the ConfD built-in Secure Shell (SSH) server for CLI was enabled. If the ConfD built-in SSH server was not enabled, the device is not affected by this vulnerability. An attacker with low-level privileges could exploit this vulnerability by authenticating to an affected device and issuing a series of commands at the SFTP interface. A successful exploit could allow the attacker to elevate privileges to the level of the account under which ConfD is running, which is commonly root.\r\n\r\nNote: Any user who can authenticate to the built-in SSH server may exploit this vulnerability. By default, all ConfD users have this access if the server is enabled.\r\n\r\nSoftware updates that address this vulnerability have been released. There are no workarounds that address this vulnerability.\r\n\r\n",
        "title": "Summary"
      },
      {
        "category": "general",
        "text": "This vulnerability affects the following releases of ConfD if the built-in SSH server for CLI is enabled:\r\n\r\nReleases 7.4 through 7.4.3\r\nReleases 7.5 through 7.5.2\r\nReleases 7.6 through 7.6.14\r\nReleases 7.7 through 7.7.12\r\nReleases 7.8 through 7.8.10\r\nReleases 8.0 through 8.0.7\r\nReleases 8.1 through 8.1.3\r\n\r\nTo determine whether the built-in SSH server is enabled, see Section 4.1.1, \u201cDisable built-in support for SSH in ConfD,\u201d in the ConfD and High Security Applications V2 [\"https://info.tail-f.com/hubfs/Whitepapers/Tail-f%20ConfDandHighSecurity%20rev%20F%202019-10-18.pdf\"] application note.",
        "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.",
        "title": "Products Confirmed Not Vulnerable"
      },
      {
        "category": "general",
        "text": "There are no workarounds that address this vulnerability. However, a mitigation is available.\r\n\r\nAdministrators can disable the ConfD built-in SSH server and use an external SSH server such as OpenSSH. For guidance on disabling the built-in support of SSH in ConfD, see Section 4.1.1, \u201cDisable built-in support for SSH in ConfD,\u201d in the ConfD and High Security Applications V2 [\"https://info.tail-f.com/hubfs/Whitepapers/Tail-f%20ConfDandHighSecurity%20rev%20F%202019-10-18.pdf\"] application note.\r\n\r\nWhile this mitigation has been deployed and was proven successful in a test environment, customers should determine the applicability and effectiveness in their own environment and under their own use conditions. Customers should be aware that any workaround or mitigation that is implemented may negatively impact the functionality or performance of their network based on intrinsic customer deployment scenarios and limitations. Customers should not deploy any workarounds or mitigations before first evaluating the applicability to their own environment and any impact to such environment.",
        "title": "Workarounds"
      },
      {
        "category": "general",
        "text": "Tail-f, a Cisco company, has released software updates that address the vulnerability described in this advisory. Customers may only install and expect support for software versions and feature sets for which they have a current license and have a valid support and maintenance agreement. By installing, downloading, accessing, or otherwise using such software upgrades, customers agree to follow the terms of their license agreement with Tail-f Systems AB. Security software updates do not entitle customers to a new software license or additional software feature sets.\r\n\r\nWhen considering software upgrades, 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\nCustomers who have a current license and have a valid support and maintenance agreement can download the fixed version of software from their existing Tail-f delivery server download account.\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 open a support ticket in the Tail-f Support system.\r\n      Fixed Releases\r\nIn the following table, the left column lists ConfD software releases. The right column indicates whether a release is affected by the vulnerability that is described in this advisory and the first release that includes the fix for this vulnerability. Customers are advised to upgrade to an appropriate fixed software release [\"https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html#fixes\"] as indicated in this section.\r\n        ConfD Release  First Fixed Release          7.4  7.4.3.1      7.5  7.5.2.1      7.6  7.6.14.1      7.7  7.7.13      7.8  7.8.11      8.0  8.0.8      8.1  8.1.4\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 during the resolution of a Cisco TAC support case.",
        "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": "ConfD CLI Secure Shell Server Privilege Escalation Vulnerability",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-confd-priv-esc-LsGtCRx4"
      },
      {
        "category": "external",
        "summary": "Cisco Security Vulnerability Policy",
        "url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html"
      },
      {
        "category": "external",
        "summary": "ConfD and High Security Applications V2",
        "url": "https://info.tail-f.com/hubfs/Whitepapers/Tail-f%20ConfDandHighSecurity%20rev%20F%202019-10-18.pdf"
      },
      {
        "category": "external",
        "summary": "ConfD and High Security Applications V2",
        "url": "https://info.tail-f.com/hubfs/Whitepapers/Tail-f%20ConfDandHighSecurity%20rev%20F%202019-10-18.pdf"
      },
      {
        "category": "external",
        "summary": "Cisco\u0026nbsp;Security Advisories page",
        "url": "https://www.cisco.com/go/psirt"
      },
      {
        "category": "external",
        "summary": "fixed software release",
        "url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html#fixes"
      },
      {
        "category": "external",
        "summary": "Security Vulnerability Policy",
        "url": "http://www.cisco.com/web/about/security/psirt/security_vulnerability_policy.html"
      }
    ],
    "title": "ConfD CLI Secure Shell Server Privilege Escalation Vulnerability",
    "tracking": {
      "current_release_date": "2023-10-04T16:00:12+00:00",
      "generator": {
        "date": "2024-05-10T23:06:32+00:00",
        "engine": {
          "name": "TVCE"
        }
      },
      "id": "cisco-sa-confd-priv-esc-LsGtCRx4",
      "initial_release_date": "2021-08-04T16:00:00+00:00",
      "revision_history": [
        {
          "date": "2021-08-04T15:58:34+00:00",
          "number": "1.0.0",
          "summary": "Initial public release."
        },
        {
          "date": "2023-10-04T16:00:12+00:00",
          "number": "2.0.0",
          "summary": "Updated information about vulnerable releases and fixed releases."
        }
      ],
      "status": "final",
      "version": "2.0.0"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_family",
            "name": "Cisco ConfD",
            "product": {
              "name": "Cisco ConfD ",
              "product_id": "CSAFPID-281298"
            }
          }
        ],
        "category": "vendor",
        "name": "Cisco"
      }
    ]
  },
  "vulnerabilities": [
    {
      "ids": [
        {
          "system_name": "Cisco Bug ID",
          "text": "CSCvy43896"
        },
        {
          "system_name": "Cisco Bug ID",
          "text": "CSCwh35199"
        }
      ],
      "notes": [
        {
          "category": "other",
          "text": "Complete.",
          "title": "Affected Product Comprehensiveness"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-281298"
        ]
      },
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Cisco has released software updates that address this vulnerability.",
          "product_ids": [
            "CSAFPID-281298"
          ],
          "url": "https://software.cisco.com"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-281298"
          ]
        }
      ],
      "title": "Cisco ConfD CLI Secure Shell Server Privilege Escalation Vulnerability"
    },
    {
      "cve": "CVE-2021-1572",
      "ids": [
        {
          "system_name": "Cisco Bug ID",
          "text": "CSCvy43896"
        },
        {
          "system_name": "Cisco Bug ID",
          "text": "CSCwh35199"
        }
      ],
      "notes": [
        {
          "category": "other",
          "text": "Complete.",
          "title": "Affected Product Comprehensiveness"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-281298"
        ]
      },
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Cisco has released software updates that address this vulnerability.",
          "product_ids": [
            "CSAFPID-281298"
          ],
          "url": "https://software.cisco.com"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-281298"
          ]
        }
      ],
      "title": "Cisco ConfD CLI Secure Shell Server Privilege Escalation Vulnerability"
    }
  ]
}