{
  "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 content scanning and message filtering features of Cisco Secure Email Gateway could allow an unauthenticated, remote attacker to overwrite arbitrary files on the underlying operating system.\r\n\r\nThis vulnerability is due to improper handling of email attachments when file analysis and content filters are enabled. An attacker could exploit this vulnerability by sending an email that contains a crafted attachment through an affected device. A successful exploit could allow the attacker to replace any file on the underlying file system. The attacker could then perform any of the following actions: add users with root privileges, modify the device configuration, execute arbitrary code, or cause a permanent denial of service (DoS) condition on the affected device.\r\n\r\nNote: Manual intervention is required to recover from the DoS condition. Customers are advised to contact the Cisco Technical Assistance Center (TAC) to help recover a device in this condition.\r\n\r\nCisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.\r\n\r\n",
        "title": "Summary"
      },
      {
        "category": "general",
        "text": "This vulnerability affects Cisco Secure Email Gateway if it is running a vulnerable release of Cisco AsyncOS and both of the following conditions are met:\r\n\r\nEither the file analysis feature, which is part of Cisco Advanced Malware Protection (AMP), or the content filter feature is enabled and assigned to an incoming mail policy\r\nThe Content Scanner Tools version is earlier than 23.3.0.4823\r\n\r\nFor information about which Cisco software releases are vulnerable, see the Fixed Software [\"#fs\"] section of this advisory.\r\n\r\nDetermine Whether File Analysis is Enabled\r\n\r\nTo determine whether file analysis is enabled, complete the following steps:\r\n\r\nConnect to the product web management interface.\r\nChoose Mail Policies \u003e Incoming Mail Policies \u003e Advanced Malware Protection.\r\nChoose a Mail Policy and inspect the value of Enable File Analysis.\r\n\r\nIf the box is checked, file analysis is enabled.\r\n\r\nDetermine Whether Content Filters are Enabled\r\n\r\nTo determine whether content filters are enabled, complete the following steps:\r\n\r\nConnect to the product web interface.\r\nChoose Mail Policies \u003e Incoming Mail Policies \u003e Content Filters.\r\n\r\nIf the Content Filters column contains anything other than Disabled, content filters are enabled.\r\n\r\nDetermine the Content Scanner Tools Version\r\n\r\nTo determine which version of Content Scanner is running, use the contentscannerstatus CLI command. The following example shows a vulnerable version of Content Scanner Tools:\r\n\r\n\r\ncisco-esa\u003e contentscannerstatus\r\nComponent              Version                Last Updated\r\nContent Scanner Tools  23.1.0.4619.13.0.1500022 Never updated",
        "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\nSecure Email and Web Manager\r\nSecure Web Appliance",
        "title": "Products Confirmed Not Vulnerable"
      },
      {
        "category": "general",
        "text": "There are no workarounds that address this vulnerability.",
        "title": "Workarounds"
      },
      {
        "category": "general",
        "text": "Cisco has released free software updates [\"https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html#ssu\"] that address the vulnerability described in this advisory. Customers with service contracts that entitle them to regular software updates should obtain security fixes through their usual update channels.\r\n\r\nCustomers 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\nThe Cisco Support and Downloads page [\"https://www.cisco.com/c/en/us/support/index.html\"] on Cisco.com provides information about licensing and downloads. This page can also display customer device support coverage for customers who use the My Devices tool.\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\nThe fix for this vulnerability is distributed through an updated version of the Content Scanner Tools package. Content Scanner Tools versions 23.3.0.4823 and later contain the fix for this vulnerability.\r\n\r\nThe updated version of Content Scanner Tools is included by default in Cisco AsyncOS for Cisco Secure Email Software releases 15.5.1-055 and later.\r\n  Update the Content Scanner Tools\r\nUpdating the Content Scanner Tools does not require a software upgrade or a product restart. Customers who configured an automated Content Scanner Tools update may not be required to perform any action to address this vulnerability.\r\n\r\nManual Update\r\n\r\nTo manually update the Content Scanner Tools, use the command CLI contentscannerupdate, as shown in the following example:\r\n\r\n\r\ncisco-esa\u003e contentscannerupdate\r\nRequesting check for new Content Scanner updates.\r\n\r\nFor instructions on how to verify the current version, see the Vulnerable Products [\"#vp\"] section of this advisory.\r\n\r\nAutomatic Update\r\n\r\nTo enable automatic updates, complete the following steps on the web management interface:\r\n\r\nChoose Security Services \u003e Service Updates.\r\nClick Edit Update Settings.\r\nClick the Automatic Updates check box.\r\nClick Submit.\r\nChoose Commit Changes on the top right of the page.\r\nConfirm the uncommitted changes by clicking on Commit Changes.\r\n\r\nFor customers who use Cisco Secure Email Cloud Gateway, no action is required. Cisco has taken actions to protect the infrastructure from this vulnerability, and a fixed version of Content Scanner Tools will be deployed as part of the standard upgrade processes for the environment.\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 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": "Cisco Secure Email Gateway Arbitrary File Write Vulnerability",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-afw-bGG2UsjH"
      },
      {
        "category": "external",
        "summary": "Cisco Security Vulnerability Policy",
        "url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html"
      },
      {
        "category": "external",
        "summary": "free software updates",
        "url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html#ssu"
      },
      {
        "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 Support and Downloads page",
        "url": "https://www.cisco.com/c/en/us/support/index.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 Security Advisories 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": "http://www.cisco.com/web/about/security/psirt/security_vulnerability_policy.html"
      }
    ],
    "title": "Cisco Secure Email Gateway Arbitrary File Write Vulnerability",
    "tracking": {
      "current_release_date": "2024-07-17T16:00:00+00:00",
      "generator": {
        "date": "2024-07-17T16:00:18+00:00",
        "engine": {
          "name": "TVCE"
        }
      },
      "id": "cisco-sa-esa-afw-bGG2UsjH",
      "initial_release_date": "2024-07-17T16:00:00+00:00",
      "revision_history": [
        {
          "date": "2024-07-17T16:00:01+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 Secure Email",
            "product": {
              "name": "Cisco Secure Email ",
              "product_id": "CSAFPID-189790"
            }
          }
        ],
        "category": "vendor",
        "name": "Cisco"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2024-20401",
      "ids": [
        {
          "system_name": "Cisco Bug ID",
          "text": "CSCwj53998"
        }
      ],
      "notes": [
        {
          "category": "other",
          "text": "Complete.",
          "title": "Affected Product Comprehensiveness"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-189790"
        ]
      },
      "release_date": "2024-07-17T16:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Cisco has released software updates that address this vulnerability.",
          "product_ids": [
            "CSAFPID-189790"
          ],
          "url": "https://software.cisco.com"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-189790"
          ]
        }
      ],
      "title": "Cisco Email Security Appliance Arbitrary File Write Vulnerability"
    }
  ]
}