Vulnerability-Lookup

ubuntu-cve-2016-2774

Vulnerability from osv_ubuntu

Published

2016-03-09 00:00

Modified

2026-04-22 07:37

Summary

Details

ISC DHCP 4.1.x before 4.1-ESV-R13 and 4.2.x and 4.3.x before 4.3.4 does not restrict the number of concurrent TCP sessions, which allows remote attackers to cause a denial of service (INSIST assertion failure or request-processing outage) by establishing many sessions.

Severity

5.9 (Medium)


                    
                      CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

N/A (UNKNOWN)

low

References

URL

Type

	https://ubuntu.com/security/CVE-2016-2774	REPORT
	https://kb.isc.org/article/AA-01354	REPORT
	https://ubuntu.com/security/notices/USN-3586-1	ADVISORY
	https://www.cve.org/CVERecord?id=CVE-2016-2774	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "isc-dhcp-client",
            "binary_version": "4.2.4-7ubuntu12.12"
          },
          {
            "binary_name": "isc-dhcp-client-noddns",
            "binary_version": "4.2.4-7ubuntu12.12"
          },
          {
            "binary_name": "isc-dhcp-common",
            "binary_version": "4.2.4-7ubuntu12.12"
          },
          {
            "binary_name": "isc-dhcp-relay",
            "binary_version": "4.2.4-7ubuntu12.12"
          },
          {
            "binary_name": "isc-dhcp-server",
            "binary_version": "4.2.4-7ubuntu12.12"
          },
          {
            "binary_name": "isc-dhcp-server-ldap",
            "binary_version": "4.2.4-7ubuntu12.12"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:14.04:LTS",
        "name": "isc-dhcp",
        "purl": "pkg:deb/ubuntu/isc-dhcp@4.2.4-7ubuntu12.12?arch=source\u0026distro=trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.2.4-7ubuntu12.12"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.2.4-7ubuntu8",
        "4.2.4-7ubuntu9",
        "4.2.4-7ubuntu10",
        "4.2.4-7ubuntu11",
        "4.2.4-7ubuntu12",
        "4.2.4-7ubuntu12.1",
        "4.2.4-7ubuntu12.2",
        "4.2.4-7ubuntu12.3",
        "4.2.4-7ubuntu12.4",
        "4.2.4-7ubuntu12.5",
        "4.2.4-7ubuntu12.6",
        "4.2.4-7ubuntu12.7",
        "4.2.4-7ubuntu12.8",
        "4.2.4-7ubuntu12.9",
        "4.2.4-7ubuntu12.10"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "isc-dhcp-client",
            "binary_version": "4.3.3-5ubuntu12.9"
          },
          {
            "binary_name": "isc-dhcp-client-ddns",
            "binary_version": "4.3.3-5ubuntu12.9"
          },
          {
            "binary_name": "isc-dhcp-common",
            "binary_version": "4.3.3-5ubuntu12.9"
          },
          {
            "binary_name": "isc-dhcp-relay",
            "binary_version": "4.3.3-5ubuntu12.9"
          },
          {
            "binary_name": "isc-dhcp-server",
            "binary_version": "4.3.3-5ubuntu12.9"
          },
          {
            "binary_name": "isc-dhcp-server-ldap",
            "binary_version": "4.3.3-5ubuntu12.9"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "isc-dhcp",
        "purl": "pkg:deb/ubuntu/isc-dhcp@4.3.3-5ubuntu12.9?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.3.3-5ubuntu12.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.3.1-5ubuntu3",
        "4.3.1-5ubuntu4",
        "4.3.1-5ubuntu5",
        "4.3.3-5ubuntu1",
        "4.3.3-5ubuntu2",
        "4.3.3-5ubuntu4",
        "4.3.3-5ubuntu5",
        "4.3.3-5ubuntu7",
        "4.3.3-5ubuntu8",
        "4.3.3-5ubuntu9",
        "4.3.3-5ubuntu10",
        "4.3.3-5ubuntu11",
        "4.3.3-5ubuntu12",
        "4.3.3-5ubuntu12.1",
        "4.3.3-5ubuntu12.3",
        "4.3.3-5ubuntu12.4",
        "4.3.3-5ubuntu12.6",
        "4.3.3-5ubuntu12.7"
      ]
    }
  ],
  "aliases": [],
  "details": "ISC DHCP 4.1.x before 4.1-ESV-R13 and 4.2.x and 4.3.x before 4.3.4 does not restrict the number of concurrent TCP sessions, which allows remote attackers to cause a denial of service (INSIST assertion failure or request-processing outage) by establishing many sessions.",
  "id": "UBUNTU-CVE-2016-2774",
  "modified": "2026-04-22T07:37:56Z",
  "published": "2016-03-09T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2016-2774"
    },
    {
      "type": "REPORT",
      "url": "https://kb.isc.org/article/AA-01354"
    },
    {
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      "url": "https://ubuntu.com/security/notices/USN-3586-1"
    },
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      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2016-2774"
    }
  ],
  "related": [
    "USN-3586-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "low",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2016-2774"
  ]
}

CVE-2016-2774 (GCVE-0-2016-2774)

Vulnerability from cvelistv5 – Published: 2016-03-09 15:26 – Updated: 2024-08-05 23:32

Summary

Severity

No CVSS data available.

CWE

Assigner

mitre

References

10 references

URL	Tags
http://rhn.redhat.com/errata/RHSA-2016-2590.html	vendor-advisoryx_refsource_REDHAT
http://www.securitytracker.com/id/1035196	vdb-entryx_refsource_SECTRACK
https://kb.isc.org/article/AA-01354	x_refsource_CONFIRM
http://www.oracle.com/technetwork/topics/security…	x_refsource_CONFIRM
http://lists.fedoraproject.org/pipermail/package-…	vendor-advisoryx_refsource_FEDORA
https://usn.ubuntu.com/3586-1/	vendor-advisoryx_refsource_UBUNTU
http://lists.opensuse.org/opensuse-updates/2016-0…	vendor-advisoryx_refsource_SUSE
http://lists.fedoraproject.org/pipermail/package-…	vendor-advisoryx_refsource_FEDORA
http://www.securityfocus.com/bid/84208	vdb-entryx_refsource_BID
https://lists.debian.org/debian-lts-announce/2019…	mailing-listx_refsource_MLIST

Date Public

2016-03-07 00:00

Show details on NVD website

JSON

To clipboard

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}

usn-3586-1

Vulnerability from osv_ubuntu

Published

2018-03-01 17:47

Modified

2026-04-22 07:36

Summary

isc-dhcp vulnerabilities

Details

Konstantin Orekhov discovered that the DHCP server incorrectly handled a large number of concurrent TCP sessions. A remote attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-2774)

It was discovered that the DHCP server incorrectly handled socket descriptors. A remote attacker could possibly use this issue to cause a denial of service. (CVE-2017-3144)

Felix Wilhelm discovered that the DHCP client incorrectly handled certain malformed responses. A remote attacker could use this issue to cause the DHCP client to crash, resulting in a denial of service, or possibly execute arbitrary code. In the default installation, attackers would be isolated by the dhclient AppArmor profile. (CVE-2018-5732)

Felix Wilhelm discovered that the DHCP server incorrectly handled reference counting. A remote attacker could possibly use this issue to cause the DHCP server to crash, resulting in a denial of service. (CVE-2018-5733)

References

URL

Type

	https://ubuntu.com/security/notices/USN-3586-1	ADVISORY
	https://ubuntu.com/security/CVE-2016-2774	REPORT
	https://ubuntu.com/security/CVE-2017-3144	REPORT
	https://ubuntu.com/security/CVE-2018-5732	REPORT
	https://ubuntu.com/security/CVE-2018-5733	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2016-2774",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2017-3144",
              "severity": [
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                {
                  "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2018-5732",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2018-5733",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
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                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:14.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
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            "binary_version": "4.2.4-7ubuntu12.12"
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          {
            "binary_name": "isc-dhcp-client-noddns",
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          },
          {
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        "4.2.4-7ubuntu10",
        "4.2.4-7ubuntu11",
        "4.2.4-7ubuntu12",
        "4.2.4-7ubuntu12.1",
        "4.2.4-7ubuntu12.2",
        "4.2.4-7ubuntu12.3",
        "4.2.4-7ubuntu12.4",
        "4.2.4-7ubuntu12.5",
        "4.2.4-7ubuntu12.6",
        "4.2.4-7ubuntu12.7",
        "4.2.4-7ubuntu12.8",
        "4.2.4-7ubuntu12.9",
        "4.2.4-7ubuntu12.10"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2016-2774",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2017-3144",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2018-5732",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2018-5733",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:16.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "isc-dhcp-client",
            "binary_version": "4.3.3-5ubuntu12.9"
          },
          {
            "binary_name": "isc-dhcp-client-ddns",
            "binary_version": "4.3.3-5ubuntu12.9"
          },
          {
            "binary_name": "isc-dhcp-common",
            "binary_version": "4.3.3-5ubuntu12.9"
          },
          {
            "binary_name": "isc-dhcp-relay",
            "binary_version": "4.3.3-5ubuntu12.9"
          },
          {
            "binary_name": "isc-dhcp-server",
            "binary_version": "4.3.3-5ubuntu12.9"
          },
          {
            "binary_name": "isc-dhcp-server-ldap",
            "binary_version": "4.3.3-5ubuntu12.9"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "isc-dhcp",
        "purl": "pkg:deb/ubuntu/isc-dhcp@4.3.3-5ubuntu12.9?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.3.3-5ubuntu12.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.3.1-5ubuntu3",
        "4.3.1-5ubuntu4",
        "4.3.1-5ubuntu5",
        "4.3.3-5ubuntu1",
        "4.3.3-5ubuntu2",
        "4.3.3-5ubuntu4",
        "4.3.3-5ubuntu5",
        "4.3.3-5ubuntu7",
        "4.3.3-5ubuntu8",
        "4.3.3-5ubuntu9",
        "4.3.3-5ubuntu10",
        "4.3.3-5ubuntu11",
        "4.3.3-5ubuntu12",
        "4.3.3-5ubuntu12.1",
        "4.3.3-5ubuntu12.3",
        "4.3.3-5ubuntu12.4",
        "4.3.3-5ubuntu12.6",
        "4.3.3-5ubuntu12.7"
      ]
    }
  ],
  "aliases": [],
  "details": "Konstantin Orekhov discovered that the DHCP server incorrectly handled a\nlarge number of concurrent TCP sessions. A remote attacker could possibly\nuse this issue to cause a denial of service. This issue only affected\nUbuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-2774)\n\nIt was discovered that the DHCP server incorrectly handled socket\ndescriptors. A remote attacker could possibly use this issue to cause a\ndenial of service. (CVE-2017-3144)\n\nFelix Wilhelm discovered that the DHCP client incorrectly handled certain\nmalformed responses. A remote attacker could use this issue to cause the\nDHCP client to crash, resulting in a denial of service, or possibly execute\narbitrary code. In the default installation, attackers would be isolated by\nthe dhclient AppArmor profile. (CVE-2018-5732)\n\nFelix Wilhelm discovered that the DHCP server incorrectly handled reference\ncounting. A remote attacker could possibly use this issue to cause the DHCP\nserver to crash, resulting in a denial of service. (CVE-2018-5733)\n",
  "id": "USN-3586-1",
  "modified": "2026-04-22T07:36:35Z",
  "published": "2018-03-01T17:47:25Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-3586-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2016-2774"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2017-3144"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2018-5732"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2018-5733"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "isc-dhcp vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2016-2774",
    "UBUNTU-CVE-2017-3144",
    "UBUNTU-CVE-2018-5732",
    "UBUNTU-CVE-2018-5733"
  ]
}

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.

Detection rules are retrieved from Rulezet.

Action not permitted

ubuntu-cve-2016-2774

Vulnerability from osv_ubuntu

CVE-2016-2774 (GCVE-0-2016-2774)

usn-3586-1

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature