fkie_cve-2018-1000005
Vulnerability from fkie_nvd
Published
2018-01-24 22:29
Modified
2024-11-21 03:39
Severity ?
9.1 (Critical) - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Summary
libcurl 7.49.0 to and including 7.57.0 contains an out bounds read in code handling HTTP/2 trailers. It was reported (https://github.com/curl/curl/pull/2231) that reading an HTTP/2 trailer could mess up future trailers since the stored size was one byte less than required. The problem is that the code that creates HTTP/1-like headers from the HTTP/2 trailer data once appended a string like `:` to the target buffer, while this was recently changed to `: ` (a space was added after the colon) but the following math wasn't updated correspondingly. When accessed, the data is read out of bounds and causes either a crash or that the (too large) data gets passed to client write. This could lead to a denial-of-service situation or an information disclosure if someone has a service that echoes back or uses the trailers for something.
References
cve@mitre.orghttp://www.securitytracker.com/id/1040273Third Party Advisory, VDB Entry
cve@mitre.orghttps://access.redhat.com/errata/RHSA-2019:1543
cve@mitre.orghttps://curl.haxx.se/docs/adv_2018-824a.htmlPatch, Vendor Advisory
cve@mitre.orghttps://github.com/curl/curl/pull/2231Issue Tracking, Patch, Third Party Advisory
cve@mitre.orghttps://usn.ubuntu.com/3554-1/Third Party Advisory
cve@mitre.orghttps://www.debian.org/security/2018/dsa-4098Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.securitytracker.com/id/1040273Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2019:1543
af854a3a-2127-422b-91ae-364da2661108https://curl.haxx.se/docs/adv_2018-824a.htmlPatch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/curl/curl/pull/2231Issue Tracking, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://usn.ubuntu.com/3554-1/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.debian.org/security/2018/dsa-4098Third Party Advisory
Impacted products
Vendor Product Version
haxx libcurl *
debian debian_linux 8.0
debian debian_linux 9.0
canonical ubuntu_linux 14.04
canonical ubuntu_linux 16.04
canonical ubuntu_linux 17.10


To clipboard 

{
   configurations: [
      {
         nodes: [
            {
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                     matchCriteriaId: "11B88D2C-921D-4324-8BFD-66069D808808",
                     versionEndIncluding: "7.57.0",
                     versionStartIncluding: "7.49.0",
                     vulnerable: true,
                  },
               ],
               negate: false,
               operator: "OR",
            },
         ],
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                     vulnerable: true,
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                     vulnerable: true,
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                     matchCriteriaId: "F7016A2A-8365-4F1A-89A2-7A19F2BCAE5B",
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   cveTags: [],
   descriptions: [
      {
         lang: "en",
         value: "libcurl 7.49.0 to and including 7.57.0 contains an out bounds read in code handling HTTP/2 trailers. It was reported (https://github.com/curl/curl/pull/2231) that reading an HTTP/2 trailer could mess up future trailers since the stored size was one byte less than required. The problem is that the code that creates HTTP/1-like headers from the HTTP/2 trailer data once appended a string like `:` to the target buffer, while this was recently changed to `: ` (a space was added after the colon) but the following math wasn't updated correspondingly. When accessed, the data is read out of bounds and causes either a crash or that the (too large) data gets passed to client write. This could lead to a denial-of-service situation or an information disclosure if someone has a service that echoes back or uses the trailers for something.",
      },
      {
         lang: "es",
         value: "libcurl 7.49.0 hasta e incluyendo la versión 7.57.0 contiene una lectura fuera de límites en los trailers de manipulación de código HTTP/2. Se ha notificado (https://github.com/curl/curl/pull/2231) que la lectura de un trailer HTTP/2 podría dañar futuros trailers debido a que el tamaño almacenado era un byte menor de lo requerido. El problema es que el código que crea cabeceras como HTTP/1 de los datos del trailer HTTP/2 anexaron una cadena como \":\" en el búfer objetivo, a pesar de que se había cambiado recientemente a \": \" (se añadió un espacio después de los dos puntos), pero la siguiente matemática no se actualizó debidamente. Al acceder a ellos, los datos se leen fuera de límites y provocan o un cierre inesperado o que los datos (demasiado grandes) se pasen a escritura del cliente. Esto podría conducir a una situación de denegación de servicio (DoS) o a una divulgación de información si alguien tiene un servicio que devuelva ecos o que emplee los trailers para algo.",
      },
   ],
   id: "CVE-2018-1000005",
   lastModified: "2024-11-21T03:39:24.313",
   metrics: {
      cvssMetricV2: [
         {
            acInsufInfo: false,
            baseSeverity: "MEDIUM",
            cvssData: {
               accessComplexity: "LOW",
               accessVector: "NETWORK",
               authentication: "NONE",
               availabilityImpact: "PARTIAL",
               baseScore: 6.4,
               confidentialityImpact: "PARTIAL",
               integrityImpact: "NONE",
               vectorString: "AV:N/AC:L/Au:N/C:P/I:N/A:P",
               version: "2.0",
            },
            exploitabilityScore: 10,
            impactScore: 4.9,
            obtainAllPrivilege: false,
            obtainOtherPrivilege: false,
            obtainUserPrivilege: false,
            source: "nvd@nist.gov",
            type: "Primary",
            userInteractionRequired: false,
         },
      ],
      cvssMetricV30: [
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               attackComplexity: "LOW",
               attackVector: "NETWORK",
               availabilityImpact: "HIGH",
               baseScore: 9.1,
               baseSeverity: "CRITICAL",
               confidentialityImpact: "HIGH",
               integrityImpact: "NONE",
               privilegesRequired: "NONE",
               scope: "UNCHANGED",
               userInteraction: "NONE",
               vectorString: "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
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            },
            exploitabilityScore: 3.9,
            impactScore: 5.2,
            source: "nvd@nist.gov",
            type: "Primary",
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   },
   published: "2018-01-24T22:29:00.307",
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   sourceIdentifier: "cve@mitre.org",
   vulnStatus: "Modified",
   weaknesses: [
      {
         description: [
            {
               lang: "en",
               value: "CWE-125",
            },
         ],
         source: "nvd@nist.gov",
         type: "Primary",
      },
   ],
}


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