fkie_cve-2020-26262
Vulnerability from fkie_nvd
Published
2021-01-13 19:15
Modified
2024-11-21 05:19
Severity ?
7.2 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
7.2 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Summary
Coturn is free open source implementation of TURN and STUN Server. Coturn before version 4.5.2 by default does not allow peers to connect and relay packets to loopback addresses in the range of `127.x.x.x`. However, it was observed that when sending a `CONNECT` request with the `XOR-PEER-ADDRESS` value of `0.0.0.0`, a successful response was received and subsequently, `CONNECTIONBIND` also received a successful response. Coturn then is able to relay packets to the loopback interface. Additionally, when coturn is listening on IPv6, which is default, the loopback interface can also be reached by making use of either `[::1]` or `[::]` as the peer address. By using the address `0.0.0.0` as the peer address, a malicious user will be able to relay packets to the loopback interface, unless `--denied-peer-ip=0.0.0.0` (or similar) has been specified. Since the default configuration implies that loopback peers are not allowed, coturn administrators may choose to not set the `denied-peer-ip` setting. The issue patched in version 4.5.2. As a workaround the addresses in the address block `0.0.0.0/8`, `[::1]` and `[::]` should be denied by default unless `--allow-loopback-peers` has been specified.
References
security-advisories@github.comhttps://github.com/coturn/coturn/blob/57180ab60afcaeb13537e69ae8cb8aefd8f3f546/ChangeLog#L48Release Notes, Third Party Advisory
security-advisories@github.comhttps://github.com/coturn/coturn/commit/abfe1fd08d78baa0947d17dac0f7411c3d948e4dPatch, Third Party Advisory
security-advisories@github.comhttps://github.com/coturn/coturn/security/advisories/GHSA-6g6j-r9rf-cm7pExploit, Third Party Advisory
security-advisories@github.comhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/G54UIUFTEC6RLPOISMB6FUW7456SBZC4/
security-advisories@github.comhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M4CJOPAQT43MYAFU3UROGLEXN3Z6RS4H/
af854a3a-2127-422b-91ae-364da2661108https://github.com/coturn/coturn/blob/57180ab60afcaeb13537e69ae8cb8aefd8f3f546/ChangeLog#L48Release Notes, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/coturn/coturn/commit/abfe1fd08d78baa0947d17dac0f7411c3d948e4dPatch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/coturn/coturn/security/advisories/GHSA-6g6j-r9rf-cm7pExploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/G54UIUFTEC6RLPOISMB6FUW7456SBZC4/
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M4CJOPAQT43MYAFU3UROGLEXN3Z6RS4H/
Impacted products
Vendor Product Version
coturn_project coturn *
fedoraproject fedora 32
fedoraproject fedora 33


To clipboard 

{
   configurations: [
      {
         nodes: [
            {
               cpeMatch: [
                  {
                     criteria: "cpe:2.3:a:coturn_project:coturn:*:*:*:*:*:*:*:*",
                     matchCriteriaId: "0AB3C866-6E5A-4FD5-895D-FFF6AEF3BDF2",
                     versionEndExcluding: "4.5.2",
                     vulnerable: true,
                  },
               ],
               negate: false,
               operator: "OR",
            },
         ],
      },
      {
         nodes: [
            {
               cpeMatch: [
                  {
                     criteria: "cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*",
                     matchCriteriaId: "36D96259-24BD-44E2-96D9-78CE1D41F956",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*",
                     matchCriteriaId: "E460AA51-FCDA-46B9-AE97-E6676AA5E194",
                     vulnerable: true,
                  },
               ],
               negate: false,
               operator: "OR",
            },
         ],
      },
   ],
   cveTags: [],
   descriptions: [
      {
         lang: "en",
         value: "Coturn is free open source implementation of TURN and STUN Server. Coturn before version 4.5.2 by default does not allow peers to connect and relay packets to loopback addresses in the range of `127.x.x.x`. However, it was observed that when sending a `CONNECT` request with the `XOR-PEER-ADDRESS` value of `0.0.0.0`, a successful response was received and subsequently, `CONNECTIONBIND` also received a successful response. Coturn then is able to relay packets to the loopback interface. Additionally, when coturn is listening on IPv6, which is default, the loopback interface can also be reached by making use of either `[::1]` or `[::]` as the peer address. By using the address `0.0.0.0` as the peer address, a malicious user will be able to relay packets to the loopback interface, unless `--denied-peer-ip=0.0.0.0` (or similar) has been specified. Since the default configuration implies that loopback peers are not allowed, coturn administrators may choose to not set the `denied-peer-ip` setting. The issue patched in version 4.5.2. As a workaround the addresses in the address block `0.0.0.0/8`, `[::1]` and `[::]` should be denied by default unless `--allow-loopback-peers` has been specified.",
      },
      {
         lang: "es",
         value: "Coturn es una implementación gratuita de código abierto de TURN y STUN Server. Coturn anterior a la versión 4.5.2 por defecto no permite a los peers conectarse y retransmitir paquetes a direcciones loopback en el rango de \"127.xxx\". Sin embargo, se observó que al enviar una petición \"CONNECT\" con el valor \"XOR-PEER-ADDRESS\" de \"0.0.0.0\", se recibió una respuesta con éxito y, posteriormente, \"CONNECTIONBIND\" también recibió una respuesta exitosa. Coturn entonces puede retransmitir paquetes hacia la interfaz loopback. Además, cuando coturn está escuchando en IPv6, que es el valor predeterminado, también se puede acceder a la interfaz de bucle invertido haciendo uso de \"[::1]\" o \"[::]\" como dirección del mismo nivel. Al usar la dirección \"0.0.0.0\" como dirección del peer, un usuario malicioso podrá retransmitir paquetes a la interfaz de bucle invertido, a menos que se haya especificado \"--denied-peer-ip=0.0.0.0\" (o similar). Dado que la configuración predeterminada implica que no se permiten los peers de bucle invertido, los administradores de turno pueden optar por no establecer la configuración \"denegado-ip\". El problema es parcheado en la versión 4.5.2. Como solución alternativa, las direcciones en el bloque de direcciones \"0.0.0.0/8\", \"[::1]\" y \"[::]\" deben denegarse por defecto a menos que se haya especificado \"--allow-loopback-peers\".",
      },
   ],
   id: "CVE-2020-26262",
   lastModified: "2024-11-21T05:19:41.527",
   metrics: {
      cvssMetricV2: [
         {
            acInsufInfo: false,
            baseSeverity: "MEDIUM",
            cvssData: {
               accessComplexity: "LOW",
               accessVector: "NETWORK",
               authentication: "NONE",
               availabilityImpact: "NONE",
               baseScore: 6.4,
               confidentialityImpact: "PARTIAL",
               integrityImpact: "PARTIAL",
               vectorString: "AV:N/AC:L/Au:N/C:P/I:P/A:N",
               version: "2.0",
            },
            exploitabilityScore: 10,
            impactScore: 4.9,
            obtainAllPrivilege: false,
            obtainOtherPrivilege: false,
            obtainUserPrivilege: false,
            source: "nvd@nist.gov",
            type: "Primary",
            userInteractionRequired: false,
         },
      ],
      cvssMetricV31: [
         {
            cvssData: {
               attackComplexity: "LOW",
               attackVector: "NETWORK",
               availabilityImpact: "NONE",
               baseScore: 7.2,
               baseSeverity: "HIGH",
               confidentialityImpact: "LOW",
               integrityImpact: "LOW",
               privilegesRequired: "NONE",
               scope: "CHANGED",
               userInteraction: "NONE",
               vectorString: "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N",
               version: "3.1",
            },
            exploitabilityScore: 3.9,
            impactScore: 2.7,
            source: "security-advisories@github.com",
            type: "Secondary",
         },
         {
            cvssData: {
               attackComplexity: "LOW",
               attackVector: "NETWORK",
               availabilityImpact: "NONE",
               baseScore: 7.2,
               baseSeverity: "HIGH",
               confidentialityImpact: "LOW",
               integrityImpact: "LOW",
               privilegesRequired: "NONE",
               scope: "CHANGED",
               userInteraction: "NONE",
               vectorString: "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N",
               version: "3.1",
            },
            exploitabilityScore: 3.9,
            impactScore: 2.7,
            source: "nvd@nist.gov",
            type: "Primary",
         },
      ],
   },
   published: "2021-01-13T19:15:16.027",
   references: [
      {
         source: "security-advisories@github.com",
         tags: [
            "Release Notes",
            "Third Party Advisory",
         ],
         url: "https://github.com/coturn/coturn/blob/57180ab60afcaeb13537e69ae8cb8aefd8f3f546/ChangeLog#L48",
      },
      {
         source: "security-advisories@github.com",
         tags: [
            "Patch",
            "Third Party Advisory",
         ],
         url: "https://github.com/coturn/coturn/commit/abfe1fd08d78baa0947d17dac0f7411c3d948e4d",
      },
      {
         source: "security-advisories@github.com",
         tags: [
            "Exploit",
            "Third Party Advisory",
         ],
         url: "https://github.com/coturn/coturn/security/advisories/GHSA-6g6j-r9rf-cm7p",
      },
      {
         source: "security-advisories@github.com",
         url: "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/G54UIUFTEC6RLPOISMB6FUW7456SBZC4/",
      },
      {
         source: "security-advisories@github.com",
         url: "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M4CJOPAQT43MYAFU3UROGLEXN3Z6RS4H/",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
            "Release Notes",
            "Third Party Advisory",
         ],
         url: "https://github.com/coturn/coturn/blob/57180ab60afcaeb13537e69ae8cb8aefd8f3f546/ChangeLog#L48",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
            "Patch",
            "Third Party Advisory",
         ],
         url: "https://github.com/coturn/coturn/commit/abfe1fd08d78baa0947d17dac0f7411c3d948e4d",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
            "Exploit",
            "Third Party Advisory",
         ],
         url: "https://github.com/coturn/coturn/security/advisories/GHSA-6g6j-r9rf-cm7p",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         url: "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/G54UIUFTEC6RLPOISMB6FUW7456SBZC4/",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         url: "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M4CJOPAQT43MYAFU3UROGLEXN3Z6RS4H/",
      },
   ],
   sourceIdentifier: "security-advisories@github.com",
   vulnStatus: "Modified",
   weaknesses: [
      {
         description: [
            {
               lang: "en",
               value: "CWE-441",
            },
            {
               lang: "en",
               value: "CWE-682",
            },
         ],
         source: "security-advisories@github.com",
         type: "Primary",
      },
   ],
}


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