fkie_cve-2025-20177
Vulnerability from fkie_nvd
Published
2025-03-12 16:15
Modified
2025-03-12 16:15
Severity ?
6.7 (Medium) - CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Summary
A vulnerability in the boot process of Cisco IOS XR Software could allow an authenticated, local attacker to bypass Cisco IOS XR image signature verification and load unverified software on an affected device. To exploit this vulnerability, the attacker must have root-system privileges on the affected device. This vulnerability is due to incomplete validation of files in the boot verification process. An attacker could exploit this vulnerability by manipulating the system configuration options to bypass some of the integrity checks that are performed during the boot process. A successful exploit could allow the attacker to control the boot configuration, which could enable them to bypass the requirement to run Cisco-signed images or alter the security properties of the running system. Note: Because exploitation of this vulnerability could result in the attacker bypassing Cisco image verification, Cisco has raised the Security Impact Rating (SIR) of this advisory from Medium to High.
References
psirt@cisco.comhttps://blog.apnic.net/2024/09/02/crafting-endless-as-paths-in-bgp/
psirt@cisco.comhttps://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-xr-verii-bypass-HhPwQRvx
Impacted products
Vendor Product Version


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{
   cveTags: [],
   descriptions: [
      {
         lang: "en",
         value: "A vulnerability in the boot process of Cisco IOS XR Software could allow an authenticated, local attacker to bypass Cisco IOS XR image signature verification and load unverified software on an affected device. To exploit this vulnerability, the attacker must have root-system privileges on the affected device.\r\n\r\nThis vulnerability is due to incomplete validation of files in the boot verification process. An attacker could exploit this vulnerability by manipulating the system configuration options to bypass some of the integrity checks that are performed during the boot process. A successful exploit could allow the attacker to control the boot configuration, which could enable them to bypass the requirement to run Cisco-signed images or alter the security properties of the running system.\r\nNote: Because exploitation of this vulnerability could result in the attacker bypassing Cisco image verification, Cisco has raised the Security Impact Rating (SIR) of this advisory from Medium to High.",
      },
      {
         lang: "es",
         value: "Una vulnerabilidad en el proceso de arranque del software Cisco IOS XR podría permitir que un atacante local autenticado omita la verificación de la firma de la imagen de Cisco IOS XR e instale software no verificado en un dispositivo afectado. Para explotar esta vulnerabilidad, el atacante debe tener privilegios de administrador en el dispositivo afectado. Esta vulnerabilidad se debe a una validación incompleta de los archivos durante el proceso de verificación de arranque. Un atacante podría explotarla manipulando las opciones de configuración del sistema para omitir algunas de las comprobaciones de integridad que se realizan durante el proceso de arranque. Una explotación exitosa podría permitir al atacante controlar la configuración de arranque, lo que podría permitirle omitir el requisito de ejecutar imágenes firmadas por Cisco o alterar las propiedades de seguridad del sistema en ejecución. Nota: Dado que la explotación de esta vulnerabilidad podría provocar que el atacante omita la verificación de la imagen de Cisco, Cisco ha elevado la calificación de impacto de seguridad (SIR) de este aviso de media a alta.",
      },
   ],
   id: "CVE-2025-20177",
   lastModified: "2025-03-12T16:15:22.347",
   metrics: {
      cvssMetricV31: [
         {
            cvssData: {
               attackComplexity: "LOW",
               attackVector: "LOCAL",
               availabilityImpact: "HIGH",
               baseScore: 6.7,
               baseSeverity: "MEDIUM",
               confidentialityImpact: "HIGH",
               integrityImpact: "HIGH",
               privilegesRequired: "HIGH",
               scope: "UNCHANGED",
               userInteraction: "NONE",
               vectorString: "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
               version: "3.1",
            },
            exploitabilityScore: 0.8,
            impactScore: 5.9,
            source: "psirt@cisco.com",
            type: "Primary",
         },
      ],
   },
   published: "2025-03-12T16:15:22.347",
   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-ios-xr-verii-bypass-HhPwQRvx",
      },
   ],
   sourceIdentifier: "psirt@cisco.com",
   vulnStatus: "Awaiting Analysis",
   weaknesses: [
      {
         description: [
            {
               lang: "en",
               value: "CWE-274",
            },
         ],
         source: "psirt@cisco.com",
         type: "Primary",
      },
   ],
}


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