FKIE_CVE-2016-5421

Vulnerability from fkie_nvd - Published: 2016-08-10 14:59 - Updated: 2026-06-17 00:49
Severity
8.1 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
Use-after-free vulnerability in libcurl before 7.50.1 allows attackers to control which connection is used or possibly have unspecified other impact via unknown vectors.
References
secalert@redhat.comhttp://lists.opensuse.org/opensuse-updates/2016-09/msg00011.htmlThird Party Advisory
secalert@redhat.comhttp://lists.opensuse.org/opensuse-updates/2016-09/msg00094.htmlThird Party Advisory
secalert@redhat.comhttp://www.debian.org/security/2016/dsa-3638Third Party Advisory
secalert@redhat.comhttp://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.htmlPatch, Third Party Advisory
secalert@redhat.comhttp://www.securityfocus.com/bid/92306Third Party Advisory, VDB Entry
secalert@redhat.comhttp://www.securitytracker.com/id/1036536Third Party Advisory, VDB Entry
secalert@redhat.comhttp://www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.563059Third Party Advisory
secalert@redhat.comhttp://www.ubuntu.com/usn/USN-3048-1Third Party Advisory
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2018:3558Third Party Advisory
secalert@redhat.comhttps://curl.haxx.se/docs/adv_20160803C.htmlMitigation, Vendor Advisory
secalert@redhat.comhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GLPXQQKURBQFM4XM6645VRPTOE2AWG33/
secalert@redhat.comhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K3GQH4V3XAQ5Z53AMQRDEC3C3UHTW7QR/
secalert@redhat.comhttps://security.gentoo.org/glsa/201701-47Third Party Advisory
secalert@redhat.comhttps://source.android.com/security/bulletin/2016-12-01.htmlThird Party Advisory
secalert@redhat.comhttps://www.tenable.com/security/tns-2016-18Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-updates/2016-09/msg00011.htmlThird Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-updates/2016-09/msg00094.htmlThird Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.debian.org/security/2016/dsa-3638Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.htmlPatch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/92306Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108http://www.securitytracker.com/id/1036536Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108http://www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.563059Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.ubuntu.com/usn/USN-3048-1Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2018:3558Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://curl.haxx.se/docs/adv_20160803C.htmlMitigation, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GLPXQQKURBQFM4XM6645VRPTOE2AWG33/
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K3GQH4V3XAQ5Z53AMQRDEC3C3UHTW7QR/
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/201701-47Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://source.android.com/security/bulletin/2016-12-01.htmlThird Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.tenable.com/security/tns-2016-18Third Party Advisory
Impacted products
Vendor Product Version
opensuse leap 42.1
haxx libcurl *
canonical ubuntu_linux 12.04
canonical ubuntu_linux 14.04
canonical ubuntu_linux 16.04
debian debian_linux 8.0
fedoraproject fedora 23
fedoraproject fedora 24
opensuse opensuse 13.2
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "secalert@redhat.com"
    }
  ],
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              "versionEndIncluding": "7.50.0",
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Use-after-free vulnerability in libcurl before 7.50.1 allows attackers to control which connection is used or possibly have unspecified other impact via unknown vectors."
    },
    {
      "lang": "es",
      "value": "Vulnerabilidad de uso despu\u00e9s de liberaci\u00f3n de memoria en libcurl en versiones anteriores a 7.50.1 permite a atacantes controlar qu\u00e9 conexi\u00f3n es usada o posiblemente tener otros impactos no especificados a trav\u00e9s de vectores desconocidos."
    }
  ],
  "id": "CVE-2016-5421",
  "lastModified": "2026-06-17T00:49:22.877",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": true,
        "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": [
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        "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"
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        "source": "nvd@nist.gov",
        "type": "Primary"
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  },
  "published": "2016-08-10T14:59:06.330",
  "references": [
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "http://lists.opensuse.org/opensuse-updates/2016-09/msg00011.html"
    },
    {
      "source": "secalert@redhat.com",
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    },
    {
      "source": "secalert@redhat.com",
      "tags": [
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      ],
      "url": "http://www.debian.org/security/2016/dsa-3638"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
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    },
    {
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        "VDB Entry"
      ],
      "url": "http://www.securitytracker.com/id/1036536"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
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      "url": "http://www.slackware.com/security/viewer.php?l=slackware-security\u0026y=2016\u0026m=slackware-security.563059"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
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      "url": "http://www.ubuntu.com/usn/USN-3048-1"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
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      "url": "https://access.redhat.com/errata/RHSA-2018:3558"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
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      ],
      "url": "https://curl.haxx.se/docs/adv_20160803C.html"
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      "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GLPXQQKURBQFM4XM6645VRPTOE2AWG33/"
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    },
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  "sourceIdentifier": "secalert@redhat.com",
  "vulnStatus": "Modified",
  "weaknesses": [
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      "description": [
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          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.