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FKIE_CVE-2016-5696

Vulnerability from fkie_nvd - Published: 2016-08-06 20:59 - Updated: 2026-06-17 00:49
Summary
net/ipv4/tcp_input.c in the Linux kernel before 4.7 does not properly determine the rate of challenge ACK segments, which makes it easier for remote attackers to hijack TCP sessions via a blind in-window attack.
References
cve@mitre.orghttp://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=75ff39ccc1bd5d3c455b6822ab09e533c551f758Issue Tracking, Patch
cve@mitre.orghttp://rhn.redhat.com/errata/RHSA-2016-1631.html
cve@mitre.orghttp://rhn.redhat.com/errata/RHSA-2016-1632.html
cve@mitre.orghttp://rhn.redhat.com/errata/RHSA-2016-1633.html
cve@mitre.orghttp://rhn.redhat.com/errata/RHSA-2016-1657.html
cve@mitre.orghttp://rhn.redhat.com/errata/RHSA-2016-1664.html
cve@mitre.orghttp://rhn.redhat.com/errata/RHSA-2016-1814.html
cve@mitre.orghttp://rhn.redhat.com/errata/RHSA-2016-1815.html
cve@mitre.orghttp://rhn.redhat.com/errata/RHSA-2016-1939.html
cve@mitre.orghttp://source.android.com/security/bulletin/2016-10-01.htmlThird Party Advisory
cve@mitre.orghttp://www.openwall.com/lists/oss-security/2016/07/12/2Mailing List, Third Party Advisory
cve@mitre.orghttp://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.htmlThird Party Advisory
cve@mitre.orghttp://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.htmlVendor Advisory
cve@mitre.orghttp://www.prnewswire.com/news-releases/mitnick-attack-reappears-at-geekpwn-macau-contest-300270779.htmlTechnical Description
cve@mitre.orghttp://www.securityfocus.com/bid/91704
cve@mitre.orghttp://www.securitytracker.com/id/1036625
cve@mitre.orghttp://www.ubuntu.com/usn/USN-3070-1
cve@mitre.orghttp://www.ubuntu.com/usn/USN-3070-2
cve@mitre.orghttp://www.ubuntu.com/usn/USN-3070-3
cve@mitre.orghttp://www.ubuntu.com/usn/USN-3070-4
cve@mitre.orghttp://www.ubuntu.com/usn/USN-3071-1
cve@mitre.orghttp://www.ubuntu.com/usn/USN-3071-2
cve@mitre.orghttp://www.ubuntu.com/usn/USN-3072-1
cve@mitre.orghttp://www.ubuntu.com/usn/USN-3072-2
cve@mitre.orghttps://bto.bluecoat.com/security-advisory/sa131
cve@mitre.orghttps://bugzilla.redhat.com/show_bug.cgi?id=1354708Issue Tracking
cve@mitre.orghttps://github.com/Gnoxter/mountain_goatExploit, Third Party Advisory
cve@mitre.orghttps://github.com/torvalds/linux/commit/75ff39ccc1bd5d3c455b6822ab09e533c551f758Issue Tracking, Patch
cve@mitre.orghttps://kc.mcafee.com/corporate/index?page=content&id=SB10167
cve@mitre.orghttps://security.paloaltonetworks.com/CVE-2016-5696
cve@mitre.orghttps://www.arista.com/en/support/advisories-notices/security-advisories/1461-security-advisory-23
cve@mitre.orghttps://www.usenix.org/system/files/conference/usenixsecurity16/sec16_paper_cao.pdfTechnical Description
af854a3a-2127-422b-91ae-364da2661108http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=75ff39ccc1bd5d3c455b6822ab09e533c551f758Issue Tracking, Patch
af854a3a-2127-422b-91ae-364da2661108http://rhn.redhat.com/errata/RHSA-2016-1631.html
af854a3a-2127-422b-91ae-364da2661108http://rhn.redhat.com/errata/RHSA-2016-1632.html
af854a3a-2127-422b-91ae-364da2661108http://rhn.redhat.com/errata/RHSA-2016-1633.html
af854a3a-2127-422b-91ae-364da2661108http://rhn.redhat.com/errata/RHSA-2016-1657.html
af854a3a-2127-422b-91ae-364da2661108http://rhn.redhat.com/errata/RHSA-2016-1664.html
af854a3a-2127-422b-91ae-364da2661108http://rhn.redhat.com/errata/RHSA-2016-1814.html
af854a3a-2127-422b-91ae-364da2661108http://rhn.redhat.com/errata/RHSA-2016-1815.html
af854a3a-2127-422b-91ae-364da2661108http://rhn.redhat.com/errata/RHSA-2016-1939.html
af854a3a-2127-422b-91ae-364da2661108http://source.android.com/security/bulletin/2016-10-01.htmlThird Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2016/07/12/2Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.htmlThird Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.htmlVendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.prnewswire.com/news-releases/mitnick-attack-reappears-at-geekpwn-macau-contest-300270779.htmlTechnical Description
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/91704
af854a3a-2127-422b-91ae-364da2661108http://www.securitytracker.com/id/1036625
af854a3a-2127-422b-91ae-364da2661108http://www.ubuntu.com/usn/USN-3070-1
af854a3a-2127-422b-91ae-364da2661108http://www.ubuntu.com/usn/USN-3070-2
af854a3a-2127-422b-91ae-364da2661108http://www.ubuntu.com/usn/USN-3070-3
af854a3a-2127-422b-91ae-364da2661108http://www.ubuntu.com/usn/USN-3070-4
af854a3a-2127-422b-91ae-364da2661108http://www.ubuntu.com/usn/USN-3071-1
af854a3a-2127-422b-91ae-364da2661108http://www.ubuntu.com/usn/USN-3071-2
af854a3a-2127-422b-91ae-364da2661108http://www.ubuntu.com/usn/USN-3072-1
af854a3a-2127-422b-91ae-364da2661108http://www.ubuntu.com/usn/USN-3072-2
af854a3a-2127-422b-91ae-364da2661108https://bto.bluecoat.com/security-advisory/sa131
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.redhat.com/show_bug.cgi?id=1354708Issue Tracking
af854a3a-2127-422b-91ae-364da2661108https://github.com/Gnoxter/mountain_goatExploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/torvalds/linux/commit/75ff39ccc1bd5d3c455b6822ab09e533c551f758Issue Tracking, Patch
af854a3a-2127-422b-91ae-364da2661108https://kc.mcafee.com/corporate/index?page=content&id=SB10167
af854a3a-2127-422b-91ae-364da2661108https://security.paloaltonetworks.com/CVE-2016-5696
af854a3a-2127-422b-91ae-364da2661108https://www.arista.com/en/support/advisories-notices/security-advisories/1461-security-advisory-23
af854a3a-2127-422b-91ae-364da2661108https://www.usenix.org/system/files/conference/usenixsecurity16/sec16_paper_cao.pdfTechnical Description
Impacted products
Vendor Product Version
google android *
oracle vm_server 3.3
oracle vm_server 3.4
linux linux_kernel *

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:google:android:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "595E33EF-6B21-425B-929C-6B883FA50081",
              "versionEndIncluding": "7.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:oracle:vm_server:3.3:*:*:*:*:*:*:*",
              "matchCriteriaId": "87AE59F3-F47B-424D-B5EB-40768018206D",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:oracle:vm_server:3.4:*:*:*:*:*:*:*",
              "matchCriteriaId": "45DC1391-1EFC-49D7-9DD5-D9D9C5DFE746",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "52847A0D-725D-40BB-B852-8937D886C0E1",
              "versionEndIncluding": "4.6.6",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "net/ipv4/tcp_input.c in the Linux kernel before 4.7 does not properly determine the rate of challenge ACK segments, which makes it easier for remote attackers to hijack TCP sessions via a blind in-window attack."
    },
    {
      "lang": "es",
      "value": "net/ipv4/tcp_input.c en el kernel de Linux en versiones anteriores a 4.7 no determina adecuadamente la tasa de segmentos de desaf\u00edo ACK, lo que facilita a atacantes remotos secuestrar sesiones TCP a trav\u00e9s de un ataque ciego en ventana."
    }
  ],
  "id": "CVE-2016-5696",
  "lastModified": "2026-06-17T00:49:53.223",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 5.8,
          "confidentialityImpact": "NONE",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 8.6,
        "impactScore": 4.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV30": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 4.8,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L",
          "version": "3.0"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 2.5,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2016-08-06T20:59:05.690",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "url": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=75ff39ccc1bd5d3c455b6822ab09e533c551f758"
    },
    {
      "source": "cve@mitre.org",
      "url": "http://rhn.redhat.com/errata/RHSA-2016-1631.html"
    },
    {
      "source": "cve@mitre.org",
      "url": "http://rhn.redhat.com/errata/RHSA-2016-1632.html"
    },
    {
      "source": "cve@mitre.org",
      "url": "http://rhn.redhat.com/errata/RHSA-2016-1633.html"
    },
    {
      "source": "cve@mitre.org",
      "url": "http://rhn.redhat.com/errata/RHSA-2016-1657.html"
    },
    {
      "source": "cve@mitre.org",
      "url": "http://rhn.redhat.com/errata/RHSA-2016-1664.html"
    },
    {
      "source": "cve@mitre.org",
      "url": "http://rhn.redhat.com/errata/RHSA-2016-1814.html"
    },
    {
      "source": "cve@mitre.org",
      "url": "http://rhn.redhat.com/errata/RHSA-2016-1815.html"
    },
    {
      "source": "cve@mitre.org",
      "url": "http://rhn.redhat.com/errata/RHSA-2016-1939.html"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "http://source.android.com/security/bulletin/2016-10-01.html"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "http://www.openwall.com/lists/oss-security/2016/07/12/2"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
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      ],
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    },
    {
      "source": "cve@mitre.org",
      "tags": [
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      ],
      "url": "http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
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      ],
      "url": "http://www.prnewswire.com/news-releases/mitnick-attack-reappears-at-geekpwn-macau-contest-300270779.html"
    },
    {
      "source": "cve@mitre.org",
      "url": "http://www.securityfocus.com/bid/91704"
    },
    {
      "source": "cve@mitre.org",
      "url": "http://www.securitytracker.com/id/1036625"
    },
    {
      "source": "cve@mitre.org",
      "url": "http://www.ubuntu.com/usn/USN-3070-1"
    },
    {
      "source": "cve@mitre.org",
      "url": "http://www.ubuntu.com/usn/USN-3070-2"
    },
    {
      "source": "cve@mitre.org",
      "url": "http://www.ubuntu.com/usn/USN-3070-3"
    },
    {
      "source": "cve@mitre.org",
      "url": "http://www.ubuntu.com/usn/USN-3070-4"
    },
    {
      "source": "cve@mitre.org",
      "url": "http://www.ubuntu.com/usn/USN-3071-1"
    },
    {
      "source": "cve@mitre.org",
      "url": "http://www.ubuntu.com/usn/USN-3071-2"
    },
    {
      "source": "cve@mitre.org",
      "url": "http://www.ubuntu.com/usn/USN-3072-1"
    },
    {
      "source": "cve@mitre.org",
      "url": "http://www.ubuntu.com/usn/USN-3072-2"
    },
    {
      "source": "cve@mitre.org",
      "url": "https://bto.bluecoat.com/security-advisory/sa131"
    },
    {
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      "tags": [
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      ],
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    },
    {
      "source": "cve@mitre.org",
      "tags": [
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      ],
      "url": "https://github.com/Gnoxter/mountain_goat"
    },
    {
      "source": "cve@mitre.org",
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    },
    {
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      "url": "https://kc.mcafee.com/corporate/index?page=content\u0026id=SB10167"
    },
    {
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      "url": "https://security.paloaltonetworks.com/CVE-2016-5696"
    },
    {
      "source": "cve@mitre.org",
      "url": "https://www.arista.com/en/support/advisories-notices/security-advisories/1461-security-advisory-23"
    },
    {
      "source": "cve@mitre.org",
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      ],
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    },
    {
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    },
    {
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    },
    {
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    },
    {
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      "url": "http://www.ubuntu.com/usn/USN-3072-2"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://bto.bluecoat.com/security-advisory/sa131"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Issue Tracking"
      ],
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1354708"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://github.com/Gnoxter/mountain_goat"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "url": "https://github.com/torvalds/linux/commit/75ff39ccc1bd5d3c455b6822ab09e533c551f758"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://kc.mcafee.com/corporate/index?page=content\u0026id=SB10167"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://security.paloaltonetworks.com/CVE-2016-5696"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://www.arista.com/en/support/advisories-notices/security-advisories/1461-security-advisory-23"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Technical Description"
      ],
      "url": "https://www.usenix.org/system/files/conference/usenixsecurity16/sec16_paper_cao.pdf"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-200"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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Taxonomy of the tags.


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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.

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Detection rules are retrieved from Rulezet.

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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.


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