{
  "document": {
    "acknowledgments": [
      {
        "summary": "This vulnerability was found during internal security testing."
      }
    ],
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "notes": [
      {
        "category": "summary",
        "text": "A vulnerability in task group assignment for a specific CLI command in Cisco IOS XR Software could allow an authenticated, local CLI shell user to elevate privileges and gain full administrative control of the device.\r\n\r\nThe vulnerability is due to incorrect mapping of a command to task groups within the source code. An attacker could exploit this vulnerability by first authenticating to the local CLI shell on the device and using the CLI command to bypass the task group\u2013based checks. A successful exploit could allow the attacker to elevate privileges and perform actions on the device without authorization checks.\r\n\r\nCisco has released software updates that address this vulnerability. There are workarounds that address this vulnerability.\r\n\r\n",
        "title": "Summary"
      },
      {
        "category": "general",
        "text": "This vulnerability affects the following Cisco products if they are running a release of Cisco IOS XR Software Release 5.0.0 or later that is earlier than the first fixed release:\r\n\r\n8000 Series Routers\r\nIOS XRv 9000 Router\r\nIOS XR, SW only\r\nNetwork Convergence System 540 Routers\r\nNetwork Convergence System 560 Routers\r\nNetwork Convergence System 4000 Series\r\nNetwork Convergence System 5500 Series\r\nNetwork Convergence System 6000 Series Routers",
        "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 the following Cisco products:\r\n\r\nASR 9000 Series Aggregation Services Routers (32-bit and 64-bit models)\r\nCarrier Routing System\r\nNetwork Convergence System 520 Routers\r\nNetwork Convergence System 1000 Series\r\nNetwork Convergence System 4200 Series\r\nNetwork Convergence System 5000 Series",
        "title": "Products Confirmed Not Vulnerable"
      },
      {
        "category": "general",
        "text": "Workarounds exist only for devices that have TACACS+ authentication, authorization, and accounting (AAA) command authorization configured. Administrators can use this feature to permit access to only the commands that nonadministrative users require and deny access to all other commands.\r\n\r\nFor more information about Cisco IOS XR task groups and AAA, see ASR9000/XR Using Task groups and understanding Priv levels and authorization [\"https://community.cisco.com/t5/service-providers-documents/asr9000-xr-using-task-groups-and-understanding-priv-levels-and/ta-p/3109596\"].",
        "title": "Workarounds"
      },
      {
        "category": "general",
        "text": "Cisco has released free 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 purchased a license. By installing, downloading, accessing, or otherwise using such software upgrades, customers agree to follow the terms of the Cisco software license:\r\nhttps://www.cisco.com/c/en/us/products/end-user-license-agreement.html [\"https://www.cisco.com/c/en/us/products/end-user-license-agreement.html\"]\r\n\r\nAdditionally, customers may only download software for which they have a valid license, procured from Cisco directly, or through a Cisco authorized reseller or partner. In most cases this will be a maintenance upgrade to software that was previously purchased. Free security software updates do not entitle customers to a new software license, additional software feature sets, or major revision upgrades.\r\n\r\nWhen 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  Customers Without Service Contracts\r\nCustomers who purchase directly from Cisco but do not hold a Cisco service contract and customers who make purchases through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should obtain upgrades by contacting the Cisco TAC: https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html [\"https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html\"]\r\n\r\nCustomers should have the product serial number available and be prepared to provide the URL of this advisory as evidence of entitlement to a free upgrade.\r\n      Fixed Releases\r\nCustomers are advised to upgrade to an appropriate fixed software release as indicated in the following table:\r\n        Cisco Platform  First Fixed Releases          8000 Series Routers  7.0.12, 7.2.1, and later      IOS XRv 9000 Router  6.6.3, 7.0.2, 7.1.1, and later      IOS XR, SW only  7.0.2, 7.1.1, and later      Network Convergence System 540 Routers  6.6.3, 7.0.2, 7.1.1, and later      Network Convergence System 560 Routers  6.6.3, 7.0.2, 7.1.1, and later      Network Convergence System 4000 Series  SMU ID for 6.5.29 - AA17787      Network Convergence System 5500 Series  6.6.3, 7.0.2, 7.1.1, and later      Network Convergence System 6000 Series Routers  6.6.3, 7.0.2, 7.1.1, and later",
        "title": "Fixed Software"
      },
      {
        "category": "general",
        "text": "To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy [\"https://sec.cloudapps.cisco.com/security/center/resources/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 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.",
        "title": "Exploitation and Public Announcements"
      },
      {
        "category": "general",
        "text": "This vulnerability was found 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"
      }
    ],
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      "contact_details": "psirt@cisco.com",
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    "references": [
      {
        "category": "self",
        "summary": "Cisco IOS XR Software Authenticated User Privilege Escalation Vulnerability",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-LJtNFjeN"
      },
      {
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        "summary": "Cisco Security Vulnerability Policy",
        "url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html"
      },
      {
        "category": "external",
        "summary": "ASR9000/XR Using Task groups and understanding Priv levels and authorization",
        "url": "https://community.cisco.com/t5/service-providers-documents/asr9000-xr-using-task-groups-and-understanding-priv-levels-and/ta-p/3109596"
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      },
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        "summary": "considering software upgrades",
        "url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html#fixes"
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      {
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        "summary": "Cisco\u0026nbsp;Security Advisories page",
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        "url": "https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html"
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    ],
    "title": "Cisco IOS XR Software Authenticated User Privilege Escalation Vulnerability",
    "tracking": {
      "current_release_date": "2020-09-02T16:00:00+00:00",
      "generator": {
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      "revision_history": [
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          "number": "1.0.0",
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          "text": "Complete.",
          "title": "Affected Product Comprehensiveness"
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      "title": "Cisco IOS XR Software Privilege Escalation Vulnerability"
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}

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  "id": "GHSA-x8v9-c427-8x6q",
  "modified": "2022-05-24T17:27:27Z",
  "published": "2022-05-24T17:27:27Z",
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          "obtainUserPrivilege": false,
          "severity": "HIGH",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 1.8,
          "impactScore": 5.9
        }
      },
      "lastModifiedDate": "2020-09-09T19:50Z",
      "publishedDate": "2020-09-04T03:15Z"
    }
  }
}