fkie_cve-2021-25216
Vulnerability from fkie_nvd
Published
2021-04-29 01:15
Modified
2024-11-21 05:54
Severity ?
8.1 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
In BIND 9.5.0 -> 9.11.29, 9.12.0 -> 9.16.13, and versions BIND 9.11.3-S1 -> 9.11.29-S1 and 9.16.8-S1 -> 9.16.13-S1 of BIND Supported Preview Edition, as well as release versions 9.17.0 -> 9.17.1 of the BIND 9.17 development branch, BIND servers are vulnerable if they are running an affected version and are configured to use GSS-TSIG features. In a configuration which uses BIND's default settings the vulnerable code path is not exposed, but a server can be rendered vulnerable by explicitly setting values for the tkey-gssapi-keytab or tkey-gssapi-credential configuration options. Although the default configuration is not vulnerable, GSS-TSIG is frequently used in networks where BIND is integrated with Samba, as well as in mixed-server environments that combine BIND servers with Active Directory domain controllers. For servers that meet these conditions, the ISC SPNEGO implementation is vulnerable to various attacks, depending on the CPU architecture for which BIND was built: For named binaries compiled for 64-bit platforms, this flaw can be used to trigger a buffer over-read, leading to a server crash. For named binaries compiled for 32-bit platforms, this flaw can be used to trigger a server crash due to a buffer overflow and possibly also to achieve remote code execution. We have determined that standard SPNEGO implementations are available in the MIT and Heimdal Kerberos libraries, which support a broad range of operating systems, rendering the ISC implementation unnecessary and obsolete. Therefore, to reduce the attack surface for BIND users, we will be removing the ISC SPNEGO implementation in the April releases of BIND 9.11 and 9.16 (it had already been dropped from BIND 9.17). We would not normally remove something from a stable ESV (Extended Support Version) of BIND, but since system libraries can replace the ISC SPNEGO implementation, we have made an exception in this case for reasons of stability and security.
References
security-officer@isc.orghttp://www.openwall.com/lists/oss-security/2021/04/29/1Mailing List, Third Party Advisory
security-officer@isc.orghttp://www.openwall.com/lists/oss-security/2021/04/29/2Mailing List, Third Party Advisory
security-officer@isc.orghttp://www.openwall.com/lists/oss-security/2021/04/29/3Mailing List, Third Party Advisory
security-officer@isc.orghttp://www.openwall.com/lists/oss-security/2021/04/29/4Mailing List, Third Party Advisory
security-officer@isc.orghttps://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfPatch, Third Party Advisory
security-officer@isc.orghttps://kb.isc.org/v1/docs/cve-2021-25215Not Applicable
security-officer@isc.orghttps://lists.debian.org/debian-lts-announce/2021/05/msg00001.htmlMailing List, Third Party Advisory
security-officer@isc.orghttps://security.netapp.com/advisory/ntap-20210521-0006/Third Party Advisory
security-officer@isc.orghttps://www.debian.org/security/2021/dsa-4909Third Party Advisory
security-officer@isc.orghttps://www.zerodayinitiative.com/advisories/ZDI-21-657/Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2021/04/29/1Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2021/04/29/2Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2021/04/29/3Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2021/04/29/4Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfPatch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://kb.isc.org/v1/docs/cve-2021-25215Not Applicable
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2021/05/msg00001.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20210521-0006/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.debian.org/security/2021/dsa-4909Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.zerodayinitiative.com/advisories/ZDI-21-657/Third Party Advisory, VDB Entry
Impacted products
Vendor Product Version
debian debian_linux 9.0
debian debian_linux 10.0
isc bind *
isc bind *
isc bind *
isc bind 9.9.3
isc bind 9.9.12
isc bind 9.9.13
isc bind 9.10.5
isc bind 9.10.7
isc bind 9.11.3
isc bind 9.11.5
isc bind 9.11.5
isc bind 9.11.5
isc bind 9.11.6
isc bind 9.11.7
isc bind 9.11.8
isc bind 9.11.12
isc bind 9.11.21
isc bind 9.11.27
isc bind 9.11.29
isc bind 9.16.8
isc bind 9.16.11
isc bind 9.16.13
siemens sinec_infrastructure_network_services *
netapp active_iq_unified_manager -
netapp cloud_backup -
netapp aff_a250_firmware -
netapp aff_a250 -
netapp aff_500f_firmware -
netapp aff_500f -
netapp h300s_firmware -
netapp h300s -
netapp h500s_firmware -
netapp h500s -
netapp h700s_firmware -
netapp h700s -
netapp h300e_firmware -
netapp h300e -
netapp h500e_firmware -
netapp h500e -
netapp h700e_firmware -
netapp h700e -
netapp h410s_firmware -
netapp h410s -


To clipboard 

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   cveTags: [],
   descriptions: [
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         lang: "en",
         value: "In BIND 9.5.0 -> 9.11.29, 9.12.0 -> 9.16.13, and versions BIND 9.11.3-S1 -> 9.11.29-S1 and 9.16.8-S1 -> 9.16.13-S1 of BIND Supported Preview Edition, as well as release versions 9.17.0 -> 9.17.1 of the BIND 9.17 development branch, BIND servers are vulnerable if they are running an affected version and are configured to use GSS-TSIG features. In a configuration which uses BIND's default settings the vulnerable code path is not exposed, but a server can be rendered vulnerable by explicitly setting values for the tkey-gssapi-keytab or tkey-gssapi-credential configuration options. Although the default configuration is not vulnerable, GSS-TSIG is frequently used in networks where BIND is integrated with Samba, as well as in mixed-server environments that combine BIND servers with Active Directory domain controllers. For servers that meet these conditions, the ISC SPNEGO implementation is vulnerable to various attacks, depending on the CPU architecture for which BIND was built: For named binaries compiled for 64-bit platforms, this flaw can be used to trigger a buffer over-read, leading to a server crash. For named binaries compiled for 32-bit platforms, this flaw can be used to trigger a server crash due to a buffer overflow and possibly also to achieve remote code execution. We have determined that standard SPNEGO implementations are available in the MIT and Heimdal Kerberos libraries, which support a broad range of operating systems, rendering the ISC implementation unnecessary and obsolete. Therefore, to reduce the attack surface for BIND users, we will be removing the ISC SPNEGO implementation in the April releases of BIND 9.11 and 9.16 (it had already been dropped from BIND 9.17). We would not normally remove something from a stable ESV (Extended Support Version) of BIND, but since system libraries can replace the ISC SPNEGO implementation, we have made an exception in this case for reasons of stability and security.",
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      {
         lang: "es",
         value: "En BIND versiones 9.5.0 posteriores a 9.11.29, versiones 9.12.0 posteriores  a 9.16.13, y BIND versiones 9.11.3-S1 posteriores a 9.11.29-S1 y versiones 9.16.8-S1 posteriores a 9.16.13-S1 de BIND Supported Preview Edition, así como las versiones 9.17.0 posteriores 9.17.1 de la rama de desarrollo BIND 9.17, los servidores BIND son vulnerables si ejecutan una versión afectada y están configurados para usar las funcionalidades GSS-TSIG. En una configuración que usa la configuración predeterminada de BIND, la ruta del código vulnerable no está expuesta, pero un servidor puede volverse vulnerable al ajustar valores explícitamente para las opciones de configuración tkey-gssapi-keytab o tkey-gssapi-credential. Aunque la configuración predeterminada no es vulnerable, GSS-TSIG es usado con frecuencia en redes donde BIND está integrado con Samba, así como en entornos de servidores mixtos que combinan servidores BIND con controladores de dominio de Active Directory. Para los servidores que cumplen con estas condiciones, la implementación de ISC SPNEGO es vulnerable a varios ataques, dependiendo de la arquitectura de la CPU para la que se construyó BIND: Para binarios con nombre compilados para plataformas de 64 bits, este fallo puede ser usado para desencadenar una sobrelectura del búfer, conllevando a un bloqueo del servidor. Para binarios con nombre compilados para plataformas de 32 bits, este fallo puede ser usado para desencadenar un bloqueo del servidor debido a un desbordamiento del búfer y posiblemente también para lograr la Ejecución de Código Remota. Hemos determinado que las implementaciones estándar de SPNEGO están disponibles en las bibliotecas MIT y Heimdal Kerberos, que admiten una amplia gama de sistemas operativos, lo que hace que la implementación de ISC sea innecesaria y obsoleta. Por lo tanto, para reducir la superficie de ataque para los usuarios de BIND, eliminaremos la implementación de ISC SPNEGO en las versiones de abril de BIND 9.11 y 9. 16 (ya se había eliminado de BIND 9.17). Normalmente no eliminaríamos algo de una ESV (versión de soporte extendido) estable de BIND, pero dado que las bibliotecas del sistema pueden reemplazar la implementación de ISC SPNEGO, hemos hecho una excepción en este caso por razones de estabilidad y seguridad",
      },
   ],
   id: "CVE-2021-25216",
   lastModified: "2024-11-21T05:54:33.850",
   metrics: {
      cvssMetricV2: [
         {
            acInsufInfo: false,
            baseSeverity: "MEDIUM",
            cvssData: {
               accessComplexity: "MEDIUM",
               accessVector: "NETWORK",
               authentication: "NONE",
               availabilityImpact: "PARTIAL",
               baseScore: 6.8,
               confidentialityImpact: "PARTIAL",
               integrityImpact: "PARTIAL",
               vectorString: "AV:N/AC:M/Au:N/C:P/I:P/A:P",
               version: "2.0",
            },
            exploitabilityScore: 8.6,
            impactScore: 6.4,
            obtainAllPrivilege: false,
            obtainOtherPrivilege: false,
            obtainUserPrivilege: false,
            source: "nvd@nist.gov",
            type: "Primary",
            userInteractionRequired: false,
         },
      ],
      cvssMetricV31: [
         {
            cvssData: {
               attackComplexity: "HIGH",
               attackVector: "NETWORK",
               availabilityImpact: "HIGH",
               baseScore: 8.1,
               baseSeverity: "HIGH",
               confidentialityImpact: "HIGH",
               integrityImpact: "HIGH",
               privilegesRequired: "NONE",
               scope: "UNCHANGED",
               userInteraction: "NONE",
               vectorString: "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
               version: "3.1",
            },
            exploitabilityScore: 2.2,
            impactScore: 5.9,
            source: "security-officer@isc.org",
            type: "Secondary",
         },
         {
            cvssData: {
               attackComplexity: "LOW",
               attackVector: "NETWORK",
               availabilityImpact: "HIGH",
               baseScore: 9.8,
               baseSeverity: "CRITICAL",
               confidentialityImpact: "HIGH",
               integrityImpact: "HIGH",
               privilegesRequired: "NONE",
               scope: "UNCHANGED",
               userInteraction: "NONE",
               vectorString: "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
               version: "3.1",
            },
            exploitabilityScore: 3.9,
            impactScore: 5.9,
            source: "nvd@nist.gov",
            type: "Primary",
         },
      ],
   },
   published: "2021-04-29T01:15:08.047",
   references: [
      {
         source: "security-officer@isc.org",
         tags: [
            "Mailing List",
            "Third Party Advisory",
         ],
         url: "http://www.openwall.com/lists/oss-security/2021/04/29/1",
      },
      {
         source: "security-officer@isc.org",
         tags: [
            "Mailing List",
            "Third Party Advisory",
         ],
         url: "http://www.openwall.com/lists/oss-security/2021/04/29/2",
      },
      {
         source: "security-officer@isc.org",
         tags: [
            "Mailing List",
            "Third Party Advisory",
         ],
         url: "http://www.openwall.com/lists/oss-security/2021/04/29/3",
      },
      {
         source: "security-officer@isc.org",
         tags: [
            "Mailing List",
            "Third Party Advisory",
         ],
         url: "http://www.openwall.com/lists/oss-security/2021/04/29/4",
      },
      {
         source: "security-officer@isc.org",
         tags: [
            "Patch",
            "Third Party Advisory",
         ],
         url: "https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf",
      },
      {
         source: "security-officer@isc.org",
         tags: [
            "Not Applicable",
         ],
         url: "https://kb.isc.org/v1/docs/cve-2021-25215",
      },
      {
         source: "security-officer@isc.org",
         tags: [
            "Mailing List",
            "Third Party Advisory",
         ],
         url: "https://lists.debian.org/debian-lts-announce/2021/05/msg00001.html",
      },
      {
         source: "security-officer@isc.org",
         tags: [
            "Third Party Advisory",
         ],
         url: "https://security.netapp.com/advisory/ntap-20210521-0006/",
      },
      {
         source: "security-officer@isc.org",
         tags: [
            "Third Party Advisory",
         ],
         url: "https://www.debian.org/security/2021/dsa-4909",
      },
      {
         source: "security-officer@isc.org",
         tags: [
            "Third Party Advisory",
            "VDB Entry",
         ],
         url: "https://www.zerodayinitiative.com/advisories/ZDI-21-657/",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
            "Mailing List",
            "Third Party Advisory",
         ],
         url: "http://www.openwall.com/lists/oss-security/2021/04/29/1",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
            "Mailing List",
            "Third Party Advisory",
         ],
         url: "http://www.openwall.com/lists/oss-security/2021/04/29/2",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
            "Mailing List",
            "Third Party Advisory",
         ],
         url: "http://www.openwall.com/lists/oss-security/2021/04/29/3",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
            "Mailing List",
            "Third Party Advisory",
         ],
         url: "http://www.openwall.com/lists/oss-security/2021/04/29/4",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
            "Patch",
            "Third Party Advisory",
         ],
         url: "https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
            "Not Applicable",
         ],
         url: "https://kb.isc.org/v1/docs/cve-2021-25215",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
            "Mailing List",
            "Third Party Advisory",
         ],
         url: "https://lists.debian.org/debian-lts-announce/2021/05/msg00001.html",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
            "Third Party Advisory",
         ],
         url: "https://security.netapp.com/advisory/ntap-20210521-0006/",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
            "Third Party Advisory",
         ],
         url: "https://www.debian.org/security/2021/dsa-4909",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
            "Third Party Advisory",
            "VDB Entry",
         ],
         url: "https://www.zerodayinitiative.com/advisories/ZDI-21-657/",
      },
   ],
   sourceIdentifier: "security-officer@isc.org",
   vulnStatus: "Modified",
   weaknesses: [
      {
         description: [
            {
               lang: "en",
               value: "CWE-125",
            },
         ],
         source: "nvd@nist.gov",
         type: "Primary",
      },
   ],
}


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