{
   cveTags: [],
   descriptions: [
      {
         lang: "en",
         value: "A vulnerability in the Internet Key Exchange version 2 (IKEv2) function of Cisco IOS XR Software could allow an unauthenticated, remote attacker to prevent an affected device from processing any control plane UDP packets. \r\n\r\nThis vulnerability is due to improper handling of malformed IKEv2 packets. An attacker could exploit this vulnerability by sending malformed IKEv2 packets to an affected device. A successful exploit could allow the attacker to prevent the affected device from processing any control plane UDP packets, resulting in a denial of service (DoS) condition.\r\nCisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.",
      },
      {
         lang: "es",
         value: "Una vulnerabilidad en la función Intercambio de Claves por Internet versión 2 (IKEv2) del software Cisco IOS XR podría permitir que un atacante remoto no autenticado impida que un dispositivo afectado procese paquetes UDP del plano de control. Esta vulnerabilidad se debe a la gestión incorrecta de paquetes IKEv2 malformados. Un atacante podría explotar esta vulnerabilidad enviando paquetes IKEv2 malformados a un dispositivo afectado. Una explotación exitosa podría permitir al atacante impedir que el dispositivo afectado procese paquetes UDP del plano de control, lo que provocaría una denegación de servicio (DoS). Cisco ha publicado actualizaciones de software que solucionan esta vulnerabilidad. No existen workarounds que la solucionen.",
      },
   ],
   id: "CVE-2025-20209",
   lastModified: "2025-03-12T16:15:22.507",
   metrics: {
      cvssMetricV31: [
         {
            cvssData: {
               attackComplexity: "LOW",
               attackVector: "NETWORK",
               availabilityImpact: "HIGH",
               baseScore: 7.5,
               baseSeverity: "HIGH",
               confidentialityImpact: "NONE",
               integrityImpact: "NONE",
               privilegesRequired: "NONE",
               scope: "UNCHANGED",
               userInteraction: "NONE",
               vectorString: "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
               version: "3.1",
            },
            exploitabilityScore: 3.9,
            impactScore: 3.6,
            source: "psirt@cisco.com",
            type: "Primary",
         },
      ],
   },
   published: "2025-03-12T16:15:22.507",
   references: [
      {
         source: "psirt@cisco.com",
         url: "https://blog.apnic.net/2024/09/02/crafting-endless-as-paths-in-bgp/",
      },
      {
         source: "psirt@cisco.com",
         url: "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xrike-9wYGpRGq",
      },
   ],
   sourceIdentifier: "psirt@cisco.com",
   vulnStatus: "Awaiting Analysis",
   weaknesses: [
      {
         description: [
            {
               lang: "en",
               value: "CWE-770",
            },
         ],
         source: "psirt@cisco.com",
         type: "Primary",
      },
   ],
}

{
   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 Internet Key Exchange version 2 (IKEv2) function of Cisco IOS XR Software could allow an unauthenticated, remote attacker to prevent an affected device from processing any control plane UDP packets.\r\n\r\nThis vulnerability is due to improper handling of malformed IKEv2 packets. An attacker could exploit this vulnerability by sending malformed IKEv2 packets to an affected device. A successful exploit could allow the attacker to prevent the affected device from processing any control plane UDP packets, resulting in a denial of service (DoS) 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\r\n\r\nThis advisory is part of the March 2025 release of the Cisco IOS XR Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: March 2025 Semiannual Cisco IOS XR Software Security Advisory Bundled Publication [\"https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-75548\"].",
            title: "Summary",
         },
         {
            category: "general",
            text: "This vulnerability affects the following Cisco products if they are running a vulnerable release of Cisco IOS XR Software and have IKEv2 enabled:\r\n\r\nNetwork Convergence System (NCS) 540L\r\nNCS 1004\r\nNCS 1010\r\nNCS 1014\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 the Device Configuration\r\n\r\nTo determine whether IKEv2 is configured on a device, use the show udp brief command and verify whether the device is listening on ports 4500 and 500. The following example shows CLI output on a device that is affected by this vulnerability:\r\n\r\n\r\nRouter#show udp brief\r\n\r\n PCB          VRF-ID     Recv-Q Send-Q Local Address      Foreign Address\r\n0x000000000000 0x60000000      0      0  0.0.0.0:4500       0.0.0.0:0\r\n0x000000000000 0x00000000      0      0  0.0.0.0:4500       0.0.0.0:0\r\n0x000000000000 0x60000000      0      0  0.0.0.0:500        0.0.0.0:0\r\n0x000000000000 0x00000000      0      0  0.0.0.0:500        0.0.0.0:0\r\nRouter#",
            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\nIOS Software\r\nIOS XE Software\r\nNX-OS Software\r\nOther IOS XR Software products that are not listed as vulnerable",
            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\nIn the following table, the left column lists Cisco software releases or trains. The right column indicates whether a release (train) is affected by the vulnerability that is described in this advisory and the first release that includes the fix for this vulnerability.\r\n          Cisco IOS XR Software Release  First Fixed Release          7.10 and earlier  Migrate to a fixed release.      7.11  7.11.21      24.1  Migrate to a fixed release.      24.2  24.2.2      24.3 and later  Not affected.\r\nSMUs are also available to address this vulnerability. Customers who require SMUs for platforms or releases that are not available are advised to contact their support organization. For more information on finding which SMUs may have been published for this vulnerability, see the Download section of Understand Cisco IOS XR Software Maintenance Updates (SMUs) [\"https://www.cisco.com/c/en/us/support/docs/ios-nx-os-software/ios-xr-software/116332-maintain-ios-xr-smu-00.html#toc-hId-972485609\"].\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 IOS XR Software Internet Key Exchange Version 2 Denial of Service Vulnerability",
            url: "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xrike-9wYGpRGq",
         },
         {
            category: "external",
            summary: "Cisco Event Response: March 2025 Semiannual Cisco IOS XR Software Security Advisory Bundled Publication",
            url: "https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-75548",
         },
         {
            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: "Understand Cisco IOS XR Software Maintenance Updates (SMUs)",
            url: "https://www.cisco.com/c/en/us/support/docs/ios-nx-os-software/ios-xr-software/116332-maintain-ios-xr-smu-00.html#toc-hId-972485609",
         },
         {
            category: "external",
            summary: "Security Vulnerability Policy",
            url: "http://www.cisco.com/web/about/security/psirt/security_vulnerability_policy.html",
         },
      ],
      title: "Cisco IOS XR Software Internet Key Exchange Version 2 Denial of Service Vulnerability",
      tracking: {
         current_release_date: "2025-03-12T16:00:00+00:00",
         generator: {
            date: "2025-03-12T15:55:05+00:00",
            engine: {
               name: "TVCE",
            },
         },
         id: "cisco-sa-xrike-9wYGpRGq",
         initial_release_date: "2025-03-12T16:00:00+00:00",
         revision_history: [
            {
               date: "2025-03-12T15:54:40+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 IOS XR Software",
                  product: {
                     name: "Cisco IOS XR Software ",
                     product_id: "CSAFPID-5834",
                  },
               },
            ],
            category: "vendor",
            name: "Cisco",
         },
      ],
   },
   vulnerabilities: [
      {
         cve: "CVE-2025-20209",
         ids: [
            {
               system_name: "Cisco Bug ID",
               text: "CSCwk64612",
            },
         ],
         notes: [
            {
               category: "other",
               text: "Complete.",
               title: "Affected Product Comprehensiveness",
            },
         ],
         product_status: {
            known_affected: [
               "CSAFPID-5834",
            ],
         },
         release_date: "2025-03-12T16:00:00+00:00",
         remediations: [
            {
               category: "vendor_fix",
               details: "Cisco has released software updates that address this vulnerability.",
               product_ids: [
                  "CSAFPID-5834",
               ],
               url: "https://software.cisco.com",
            },
         ],
         scores: [
            {
               cvss_v3: {
                  baseScore: 7.5,
                  baseSeverity: "HIGH",
                  vectorString: "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  version: "3.1",
               },
               products: [
                  "CSAFPID-5834",
               ],
            },
         ],
         title: "Cisco IOS XR Software Internet Key Exchange Version 2 Denial of Service Vulnerability",
      },
   ],
}

{
   affected: [],
   aliases: [
      "CVE-2025-20209",
   ],
   database_specific: {
      cwe_ids: [
         "CWE-770",
      ],
      github_reviewed: false,
      github_reviewed_at: null,
      nvd_published_at: "2025-03-12T16:15:22Z",
      severity: "HIGH",
   },
   details: "A vulnerability in the Internet Key Exchange version 2 (IKEv2) function of Cisco IOS XR Software could allow an unauthenticated, remote attacker to prevent an affected device from processing any control plane UDP packets. \n\nThis vulnerability is due to improper handling of malformed IKEv2 packets. An attacker could exploit this vulnerability by sending malformed IKEv2 packets to an affected device. A successful exploit could allow the attacker to prevent the affected device from processing any control plane UDP packets, resulting in a denial of service (DoS) condition.\nCisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.",
   id: "GHSA-f769-hvjj-2wv2",
   modified: "2025-03-12T18:32:53Z",
   published: "2025-03-12T18:32:53Z",
   references: [
      {
         type: "ADVISORY",
         url: "https://nvd.nist.gov/vuln/detail/CVE-2025-20209",
      },
      {
         type: "WEB",
         url: "https://blog.apnic.net/2024/09/02/crafting-endless-as-paths-in-bgp",
      },
      {
         type: "WEB",
         url: "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xrike-9wYGpRGq",
      },
   ],
   schema_version: "1.4.0",
   severity: [
      {
         score: "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
         type: "CVSS_V3",
      },
   ],
}