{
  "document": {
    "acknowledgments": [
      {
        "summary": "Cisco would like to thank Joshua Graham of TSS for reporting this vulnerability."
      }
    ],
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "notes": [
      {
        "category": "summary",
        "text": "A Java deserialization vulnerability in Cisco Unity Express (CUE) could allow an unauthenticated, remote attacker to execute arbitrary shell commands with the privileges of the root user.\r\n\r\nThe vulnerability is due to insecure deserialization of user-supplied content by the affected software. An attacker could exploit this vulnerability by sending a malicious serialized Java object to the listening Java Remote Method Invocation (RMI) service. A successful exploit could allow the attacker to execute arbitrary commands on the device with root privileges.\r\n\r\nCisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.\r\n\r\nThis advisory is available at the following link:\r\nhttps://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181107-cue [\"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181107-cue\"]",
        "title": "Summary"
      },
      {
        "category": "general",
        "text": "This vulnerability affects all releases of Cisco Unity Express prior to release 9.0.6. Administrators can use one of the following methods to determine which version of software is running on the device:\r\n  Cisco Unity Express - Administration Login Page\r\nOn the Cisco Unity Express Administration login page, under the heading Cisco Unity Express - Administration, the Version field indicates the current version of software running on the device.\r\n  Cisco Unity Express - Command Line Interface\r\nFrom the CUE CLI, enter the show software versions command. The following example shows a device that is running version 9.0.0:\r\n\r\n\r\nCUE# show software versions\r\nCisco Unity Express Virtual version (9.0.0)  Technical Support: http://www.cisco.com/techsupport Copyright (c) 1986-2016 by Cisco Systems, Inc.",
        "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": "Access Control List\r\nThis vulnerability can be exploited over TCP port 1099. The CUE does not need this port to be open externally and may be blocked to protect against remote exploitation of this vulnerability.  An administrator can configure an access control list that blocks all traffic with a destination port of TCP/1099 from reaching the CUE as shown in the following example:\r\n\r\n\r\ninterface SM2/0\r\n ip unnumbered GigabitEthernet0/0   ip access-group CSCvm02856_Mitigation in   ip access-group CSCvm02856_Mitigation out   service-module ip address 192.168.0.2 255.255.255.0   !Application: CUE Running on SM   service-module ip default-gateway 192.168.0.1  !  ip access-list extended CSCvm02856_Mitigation   deny   tcp any host 192.168.0.2 eq 1099   deny   tcp host 192.168.0.2 eq 1099 any   permit any any",
        "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, customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories and Alerts 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\r\nCustomers Without Service Contracts\r\n\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:\r\nhttps://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\nThis vulnerability is fixed in Cisco Unity Express 9.0.6 and later releases. The software can be downloaded from the Software Center [\"https://software.cisco.com/download/navigator.html\"] Cisco.com by navigating to Browse All \u003e Unified Communications \u003e Unified Communications Applications \u003e Messaging \u003e Unity Express \u003e Unity Express Version 9.\r\n\r\nThere are no current plans to release a fixed version of CUE 8.6. Customers on CUE 8.6 are recommended to implement the workaround or migrate to CUE 9.0.6.",
        "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": "Cisco would like to thank Joshua Graham of TSS for reporting this vulnerability.",
        "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": "Emergency Support:\r\n+1 877 228 7302 (toll-free within North America)\r\n+1 408 525 6532 (International direct-dial)\r\nNon-emergency Support:\r\nEmail: psirt@cisco.com\r\nSupport requests that are received via e-mail are typically acknowledged within 48 hours.",
      "issuing_authority": "Cisco product security incident response is the responsibility of the Cisco Product Security Incident Response Team (PSIRT). The Cisco PSIRT is a dedicated, global team that manages the receipt, investigation, and public reporting of security vulnerability information that is related to Cisco products and networks. The on-call Cisco PSIRT works 24x7 with Cisco customers, independent security researchers, consultants, industry organizations, and other vendors to identify possible security issues with Cisco products and networks.\r\nMore information can be found in Cisco Security Vulnerability Policy available at https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html",
      "name": "Cisco",
      "namespace": "https://wwww.cisco.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "Cisco Unity Express Arbitrary Command Execution Vulnerability",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181107-cue"
      },
      {
        "category": "external",
        "summary": "Cisco Security Vulnerability Policy",
        "url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html"
      },
      {
        "category": "external",
        "summary": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181107-cue",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181107-cue"
      },
      {
        "category": "external",
        "summary": "https://www.cisco.com/c/en/us/products/end-user-license-agreement.html",
        "url": "https://www.cisco.com/c/en/us/products/end-user-license-agreement.html"
      },
      {
        "category": "external",
        "summary": "Cisco Security Advisories and Alerts page",
        "url": "https://www.cisco.com/go/psirt"
      },
      {
        "category": "external",
        "summary": "https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html",
        "url": "https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html"
      },
      {
        "category": "external",
        "summary": "Software Center",
        "url": "https://software.cisco.com/download/navigator.html"
      },
      {
        "category": "external",
        "summary": "Security Vulnerability Policy",
        "url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html"
      }
    ],
    "title": "Cisco Unity Express Arbitrary Command Execution Vulnerability",
    "tracking": {
      "current_release_date": "2018-11-07T16:00:00+00:00",
      "generator": {
        "date": "2022-09-03T03:03:29+00:00",
        "engine": {
          "name": "TVCE"
        }
      },
      "id": "cisco-sa-20181107-cue",
      "initial_release_date": "2018-11-07T16:00:00+00:00",
      "revision_history": [
        {
          "date": "2018-11-07T01:04:45+00:00",
          "number": "1.0.0",
          "summary": "Initial public release."
        }
      ],
      "status": "final",
      "version": "1.0.0"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_family",
            "name": "Cisco Unity Express",
            "product": {
              "name": "Cisco Unity Express ",
              "product_id": "CSAFPID-6046"
            }
          }
        ],
        "category": "vendor",
        "name": "Cisco"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2018-15381",
      "ids": [
        {
          "system_name": "Cisco Bug ID",
          "text": "CSCvm02856"
        }
      ],
      "notes": [
        {
          "category": "other",
          "text": "Complete.",
          "title": "Affected Product Comprehensiveness"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-6046"
        ]
      },
      "release_date": "2018-11-07T16:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Cisco has released software updates that address this vulnerability.",
          "product_ids": [
            "CSAFPID-6046"
          ],
          "url": "https://software.cisco.com"
        },
        {
          "category": "workaround",
          "details": "Access Control List\r\nThis vulnerability can be exploited over TCP port 1099. The CUE does not need this port to be open externally and may be blocked to protect against remote exploitation of this vulnerability.  An administrator can configure an access control list that blocks all traffic with a destination port of TCP/1099 from reaching the CUE as shown in the following example:\r\n\r\n\r\ninterface SM2/0\r\n ip unnumbered GigabitEthernet0/0   ip access-group CSCvm02856_Mitigation in   ip access-group CSCvm02856_Mitigation out   service-module ip address 192.168.0.2 255.255.255.0   !Application: CUE Running on SM   service-module ip default-gateway 192.168.0.1  !  ip access-list extended CSCvm02856_Mitigation   deny   tcp any host 192.168.0.2 eq 1099   deny   tcp host 192.168.0.2 eq 1099 any   permit any any",
          "product_ids": [
            "CSAFPID-6046"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.0"
          },
          "products": [
            "CSAFPID-6046"
          ]
        }
      ],
      "title": "Cisco Unity Express Arbitrary Command Execution Vulnerability"
    }
  ]
}