{
  "affected": [],
  "aliases": [
    "CVE-2018-15453"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-787"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2019-01-10T18:29:00Z",
    "severity": "HIGH"
  },
  "details": "A vulnerability in the Secure/Multipurpose Internet Mail Extensions (S/MIME) Decryption and Verification or S/MIME Public Key Harvesting features of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to cause an affected device to corrupt system memory. A successful exploit could cause the filtering process to unexpectedly reload, resulting in a denial of service (DoS) condition on the device. The vulnerability is due to improper input validation of S/MIME-signed emails. An attacker could exploit this vulnerability by sending a malicious S/MIME-signed email through a targeted device. If Decryption and Verification or Public Key Harvesting is configured, the filtering process could crash due to memory corruption and restart, resulting in a DoS condition. The software could then resume processing the same S/MIME-signed email, causing the filtering process to crash and restart again. A successful exploit could allow the attacker to cause a permanent DoS condition. This vulnerability may require manual intervention to recover the ESA.",
  "id": "GHSA-62wx-gppg-6grr",
  "modified": "2022-05-13T01:16:15Z",
  "published": "2022-05-13T01:16:15Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-15453"
    },
    {
      "type": "WEB",
      "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190109-esa-dos"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/106511"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

{
  "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 the Secure/Multipurpose Internet Mail Extensions (S/MIME) Decryption and Verification or S/MIME Public Key Harvesting features of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to cause an affected device to corrupt system memory. A successful exploit could cause the filtering process to unexpectedly reload, resulting in a denial of service (DoS) condition on the device.\r\n\r\nThe vulnerability is due to improper input validation of S/MIME-signed emails. An attacker could exploit this vulnerability by sending a malicious S/MIME-signed email through a targeted device. If Decryption and Verification or Public Key Harvesting is configured, the filtering process could crash due to memory corruption and restart, resulting in a DoS condition. The software could then resume processing the same S/MIME-signed email, causing the filtering process to crash and restart again. A successful exploit could allow the attacker to cause a permanent DoS condition. This vulnerability may require manual intervention to recover the ESA.\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-20190109-esa-dos [\"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190109-esa-dos\"]",
        "title": "Summary"
      },
      {
        "category": "general",
        "text": "This vulnerability affects all software versions prior to the first fixed release of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA), both virtual and hardware appliances, if the software is configured for S/MIME Decryption and Verification or S/MIME Public Key Harvesting.\r\n\r\nTo determine if S/MIME Decryption and Verification is configured on an ESA, an administrator can do the following:\r\n\r\nNavigate to Click Mail Policies \u003e Mail Flow Policies.\r\nNavigate through all existing Mail Flow Policies.\r\nScroll down to the Security Features section on each Mail Flow Policy.\r\nUnder S/MIME Decryption/Verification, verify if S/MIME decryption and verification is enabled.\r\n\r\nTo determine if S/MIME Public Key Harvesting is configured on an ESA, an administrator can do the following:\r\n\r\nNavigate to Click Mail Policies \u003e Mail Flow Policies.\r\nNavigate through all existing Mail Flow Policies.\r\nScroll down to the Security Features section on each Mail Flow Policy.\r\nUnder S/MIME Public Key Harvesting, verify if S/MIME Public Key Harvesting is enabled.\r\n\r\nFor additional information on ESA S/MIME capabilities and configuration, please refer to S/MIME Security Services in Email Security Appliance [\"https://www.cisco.com/c/en/us/td/docs/security/esa/esa11-0/user_guide_fs/b_ESA_Admin_Guide_11_0/b_ESA_Admin_Guide_chapter_010011.html#con_1127154\"].\r\n\r\nTo determine whether a vulnerable release of Cisco AsyncOS Software is running on an ESA, administrators can use the version command in the ESA CLI. The following example shows the output of the command for an ESA that is running Cisco AsyncOS Software Release 10.0.1-087:\r\nciscoesa\u003e version\r\n  Current Version  ===============  Product: Cisco C100V Email Security Virtual Appliance\r\nModel: C100V\r\nVersion: 10.0.1-087\r\n.  .  .",
        "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 products:\r\n\r\nContent Security Management Appliance, virtual and hardware versions\r\nWeb Security Appliance, virtual and hardware versions",
        "title": "Products Confirmed Not Vulnerable"
      },
      {
        "category": "general",
        "text": "Exploitation of this vulnerability could cause the ESA to resume processing the same faulty email message each time the ESA reloads, resulting in a permanent DoS condition. Customers should contact the Cisco Technical Assistance Center (TAC) for recovery procedures.",
        "title": "Indicators of Compromise"
      },
      {
        "category": "general",
        "text": "There are no workarounds that address this vulnerability.",
        "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  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:\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\nIn the following table, the left column lists major releases of Cisco AsyncOS Software for ESA. The right column indicates whether a major release is affected by the vulnerability described in this advisory and the first minor release that includes the fix for this vulnerability.\r\n\r\nCustomers should upgrade to an appropriate release as indicated in the following table:\r\n                                              Cisco AsyncOS Software for ESA Major Release              First Fixed Release                                    Prior to 9.0\r\n               Affected; migrate to 11.0.2-044                                   9.0.x               Affected; migrate to 11.0.2-044                                   10.0.x               Affected; migrate to 11.0.2-044                                   11.0.x               11.0.2-0441                                   11.1.x               11.1.1-037 or 11.1.2-0232                                    12.x               Not vulnerable\r\n                    111.0.2-044 will run on all legacy hardware for ESA models x70, x80, and x90 and the virtual appliances.\r\n211.1.1-037 and 12.0.0-281 will run on ESA models x80 and x90 and the virtual appliances.\r\n\r\nNote that Cisco provides regular maintenance of products in the Cisco Cloud Email Security (CES) service solution, which includes Cisco Email Security Appliance (ESA) and Cisco Content Security Management Appliance (SMA). Customers can also request a software upgrade by contacting the Cisco TAC.",
        "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 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": "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 Email Security Appliance Memory Corruption Denial of Service Vulnerability",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190109-esa-dos"
      },
      {
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        "url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html"
      },
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        "summary": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190109-esa-dos",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190109-esa-dos"
      },
      {
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        "summary": "S/MIME Security Services in Email Security Appliance",
        "url": "https://www.cisco.com/c/en/us/td/docs/security/esa/esa11-0/user_guide_fs/b_ESA_Admin_Guide_11_0/b_ESA_Admin_Guide_chapter_010011.html#con_1127154"
      },
      {
        "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": "Security Vulnerability Policy",
        "url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html"
      }
    ],
    "title": "Cisco Email Security Appliance Memory Corruption Denial of Service Vulnerability",
    "tracking": {
      "current_release_date": "2019-01-09T16:00:00+00:00",
      "generator": {
        "date": "2022-09-03T03:05:00+00:00",
        "engine": {
          "name": "TVCE"
        }
      },
      "id": "cisco-sa-20190109-esa-dos",
      "initial_release_date": "2019-01-09T16:00:00+00:00",
      "revision_history": [
        {
          "date": "2019-01-09T15:58:21+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 Email Security Appliance (ESA)",
            "product": {
              "name": "Cisco Email Security Appliance (ESA) ",
              "product_id": "CSAFPID-189790"
            }
          },
          {
            "category": "product_family",
            "name": "Cisco Email Security Virtual Appliance",
            "product": {
              "name": "Cisco Email Security Virtual Appliance ",
              "product_id": "CSAFPID-208413"
            }
          }
        ],
        "category": "vendor",
        "name": "Cisco"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2018-15453",
      "ids": [
        {
          "system_name": "Cisco Bug ID",
          "text": "CSCvk73786"
        }
      ],
      "notes": [
        {
          "category": "other",
          "text": "Complete.",
          "title": "Affected Product Comprehensiveness"
        }
      ],
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          "CSAFPID-208413"
        ]
      },
      "release_date": "2019-01-09T16:00:00+00:00",
      "remediations": [
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          "details": "Cisco has released software updates that address this vulnerability.",
          "product_ids": [
            "CSAFPID-189790",
            "CSAFPID-208413"
          ],
          "url": "https://software.cisco.com"
        }
      ],
      "scores": [
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            "baseScore": 8.6,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
            "version": "3.0"
          },
          "products": [
            "CSAFPID-189790",
            "CSAFPID-208413"
          ]
        }
      ],
      "title": "Cisco Email Security Appliance Memory Corruption Denial of Service Vulnerability"
    }
  ]
}

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
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              "matchCriteriaId": "2F97ED5E-C7B2-4DA7-A6F9-9CE6C210E184",
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            }
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          "operator": "OR"
        }
      ]
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability in the Secure/Multipurpose Internet Mail Extensions (S/MIME) Decryption and Verification or S/MIME Public Key Harvesting features of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to cause an affected device to corrupt system memory. A successful exploit could cause the filtering process to unexpectedly reload, resulting in a denial of service (DoS) condition on the device. The vulnerability is due to improper input validation of S/MIME-signed emails. An attacker could exploit this vulnerability by sending a malicious S/MIME-signed email through a targeted device. If Decryption and Verification or Public Key Harvesting is configured, the filtering process could crash due to memory corruption and restart, resulting in a DoS condition. The software could then resume processing the same S/MIME-signed email, causing the filtering process to crash and restart again. A successful exploit could allow the attacker to cause a permanent DoS condition. This vulnerability may require manual intervention to recover the ESA."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad en el descifrado de S/MIME (Secure/Multipurpose Internet Mail Extensions) y la verificaci\u00f3n de caracter\u00edsticas de recopilaci\u00f3n de claves p\u00fablicas de S/MIME de Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) podr\u00eda permitir que un atacante remoto no autenticado provoque que el dispositivo afectado corrompa la memoria del sistema. Su explotaci\u00f3n con \u00e9xito podr\u00eda permitir que el proceso de filtrado se recargue, provocando una denegaci\u00f3n de servicio (DoS) en el dispositivo. La vulnerabilidad se debe a una validaci\u00f3n de entradas incorrecta de los correos electr\u00f3nicos firmados por S/MIME. Un atacante podr\u00eda explotar esta vulnerabilidad mediante el env\u00edo de un correo electr\u00f3nico firmado por S/MIME a trav\u00e9s de un dispositivo objetivo. Si el descifrado y la verificaci\u00f3n o la recopilaci\u00f3n de claves p\u00fablicas est\u00e1n configurados, el proceso de filtrado podr\u00eda cerrarse inesperadamente debido a la corrupci\u00f3n de memoria y reiniciarse, lo que resulta en una condici\u00f3n de denegaci\u00f3n de servicio (DoS). As\u00ed, el software podr\u00eda continuar el procesamiento del mismo correo firmado por S/MIME, provocando que el proceso de filtrado se cierre inesperadamente y se reinicie de nuevo. Su explotaci\u00f3n con \u00e9xito podr\u00eda permitir que el atacante provoque una condici\u00f3n de denegaci\u00f3n de servicio (DoS) permanente. Esta vulnerabilidad podr\u00eda requerir intervenci\u00f3n manual para recuperar ESA."
    }
  ],
  "id": "CVE-2018-15453",
  "lastModified": "2024-11-21T03:50:50.217",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "HIGH",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "COMPLETE",
          "baseScore": 7.8,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 6.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
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        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
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          "baseScore": 8.6,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
          "version": "3.0"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 4.0,
        "source": "psirt@cisco.com",
        "type": "Secondary"
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.6,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 4.0,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2019-01-10T18:29:00.500",
  "references": [
    {
      "source": "psirt@cisco.com",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "http://www.securityfocus.com/bid/106511"
    },
    {
      "source": "psirt@cisco.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190109-esa-dos"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "http://www.securityfocus.com/bid/106511"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190109-esa-dos"
    }
  ],
  "sourceIdentifier": "psirt@cisco.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ],
      "source": "psirt@cisco.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

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