UBUNTU-CVE-2018-5733

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Source

https://ubuntu.com/security/CVE-2018-5733

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-5733.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2018-5733

Related

Published

2018-03-01T00:00:00Z

Modified

2025-06-02T17:09:31Z

Severity

7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
5.9 (Medium) CVSS_V3 - CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator

Summary

[none]

Details

A malicious client which is allowed to send very large amounts of traffic (billions of packets) to a DHCP server can eventually overflow a 32-bit reference counter, potentially causing dhcpd to crash. Affects ISC DHCP 4.1.0 -> 4.1-ESV-R15, 4.2.0 -> 4.2.8, 4.3.0 -> 4.3.6, 4.4.0.

References

Affected packages

Ubuntu:14.04:LTS / isc-dhcp

Package

Name: isc-dhcp
Purl: pkg:deb/ubuntu/isc-dhcp@4.2.4-7ubuntu12.12?arch=source&distro=trusty

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

4.2.4-7ubuntu12.12

Affected versions

4.*

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",
    "ubuntu_priority": "medium",
    "binaries": [
        {
            "binary_name": "isc-dhcp-client",
            "binary_version": "4.2.4-7ubuntu12.12"
        },
        {
            "binary_name": "isc-dhcp-client-dbg",
            "binary_version": "4.2.4-7ubuntu12.12"
        },
        {
            "binary_name": "isc-dhcp-client-dbgsym",
            "binary_version": "4.2.4-7ubuntu12.12"
        },
        {
            "binary_name": "isc-dhcp-client-noddns",
            "binary_version": "4.2.4-7ubuntu12.12"
        },
        {
            "binary_name": "isc-dhcp-client-udeb",
            "binary_version": "4.2.4-7ubuntu12.12"
        },
        {
            "binary_name": "isc-dhcp-client-udeb-dbgsym",
            "binary_version": "4.2.4-7ubuntu12.12"
        },
        {
            "binary_name": "isc-dhcp-common",
            "binary_version": "4.2.4-7ubuntu12.12"
        },
        {
            "binary_name": "isc-dhcp-common-dbgsym",
            "binary_version": "4.2.4-7ubuntu12.12"
        },
        {
            "binary_name": "isc-dhcp-dev",
            "binary_version": "4.2.4-7ubuntu12.12"
        },
        {
            "binary_name": "isc-dhcp-relay",
            "binary_version": "4.2.4-7ubuntu12.12"
        },
        {
            "binary_name": "isc-dhcp-relay-dbg",
            "binary_version": "4.2.4-7ubuntu12.12"
        },
        {
            "binary_name": "isc-dhcp-relay-dbgsym",
            "binary_version": "4.2.4-7ubuntu12.12"
        },
        {
            "binary_name": "isc-dhcp-server",
            "binary_version": "4.2.4-7ubuntu12.12"
        },
        {
            "binary_name": "isc-dhcp-server-dbg",
            "binary_version": "4.2.4-7ubuntu12.12"
        },
        {
            "binary_name": "isc-dhcp-server-dbgsym",
            "binary_version": "4.2.4-7ubuntu12.12"
        },
        {
            "binary_name": "isc-dhcp-server-ldap",
            "binary_version": "4.2.4-7ubuntu12.12"
        },
        {
            "binary_name": "isc-dhcp-server-ldap-dbgsym",
            "binary_version": "4.2.4-7ubuntu12.12"
        }
    ]
}

Ubuntu:16.04:LTS / isc-dhcp

Package

Name: isc-dhcp
Purl: pkg:deb/ubuntu/isc-dhcp@4.3.3-5ubuntu12.9?arch=source&distro=xenial

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

4.3.3-5ubuntu12.9

Affected versions

4.*

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

Ecosystem specific

{
    "availability": "No subscription required",
    "ubuntu_priority": "medium",
    "binaries": [
        {
            "binary_name": "isc-dhcp-client",
            "binary_version": "4.3.3-5ubuntu12.9"
        },
        {
            "binary_name": "isc-dhcp-client-dbgsym",
            "binary_version": "4.3.3-5ubuntu12.9"
        },
        {
            "binary_name": "isc-dhcp-client-ddns",
            "binary_version": "4.3.3-5ubuntu12.9"
        },
        {
            "binary_name": "isc-dhcp-client-ddns-dbgsym",
            "binary_version": "4.3.3-5ubuntu12.9"
        },
        {
            "binary_name": "isc-dhcp-client-udeb",
            "binary_version": "4.3.3-5ubuntu12.9"
        },
        {
            "binary_name": "isc-dhcp-client-udeb-dbgsym",
            "binary_version": "4.3.3-5ubuntu12.9"
        },
        {
            "binary_name": "isc-dhcp-common",
            "binary_version": "4.3.3-5ubuntu12.9"
        },
        {
            "binary_name": "isc-dhcp-common-dbgsym",
            "binary_version": "4.3.3-5ubuntu12.9"
        },
        {
            "binary_name": "isc-dhcp-dbg",
            "binary_version": "4.3.3-5ubuntu12.9"
        },
        {
            "binary_name": "isc-dhcp-dev",
            "binary_version": "4.3.3-5ubuntu12.9"
        },
        {
            "binary_name": "isc-dhcp-dev-dbgsym",
            "binary_version": "4.3.3-5ubuntu12.9"
        },
        {
            "binary_name": "isc-dhcp-relay",
            "binary_version": "4.3.3-5ubuntu12.9"
        },
        {
            "binary_name": "isc-dhcp-relay-dbgsym",
            "binary_version": "4.3.3-5ubuntu12.9"
        },
        {
            "binary_name": "isc-dhcp-server",
            "binary_version": "4.3.3-5ubuntu12.9"
        },
        {
            "binary_name": "isc-dhcp-server-dbgsym",
            "binary_version": "4.3.3-5ubuntu12.9"
        },
        {
            "binary_name": "isc-dhcp-server-ldap",
            "binary_version": "4.3.3-5ubuntu12.9"
        },
        {
            "binary_name": "isc-dhcp-server-ldap-dbgsym",
            "binary_version": "4.3.3-5ubuntu12.9"
        }
    ]
}

Ubuntu:18.04:LTS / isc-dhcp

Package

Name: isc-dhcp
Purl: pkg:deb/ubuntu/isc-dhcp@4.3.5-3ubuntu5?arch=source&distro=bionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

4.3.5-3ubuntu5

Affected versions

4.*

4.3.5-3ubuntu2

4.3.5-3ubuntu3

4.3.5-3ubuntu4

Ecosystem specific

{
    "availability": "No subscription required",
    "ubuntu_priority": "medium",
    "binaries": [
        {
            "binary_name": "isc-dhcp-client",
            "binary_version": "4.3.5-3ubuntu5"
        },
        {
            "binary_name": "isc-dhcp-client-dbgsym",
            "binary_version": "4.3.5-3ubuntu5"
        },
        {
            "binary_name": "isc-dhcp-client-ddns",
            "binary_version": "4.3.5-3ubuntu5"
        },
        {
            "binary_name": "isc-dhcp-client-ddns-dbgsym",
            "binary_version": "4.3.5-3ubuntu5"
        },
        {
            "binary_name": "isc-dhcp-client-udeb",
            "binary_version": "4.3.5-3ubuntu5"
        },
        {
            "binary_name": "isc-dhcp-common",
            "binary_version": "4.3.5-3ubuntu5"
        },
        {
            "binary_name": "isc-dhcp-dev",
            "binary_version": "4.3.5-3ubuntu5"
        },
        {
            "binary_name": "isc-dhcp-relay",
            "binary_version": "4.3.5-3ubuntu5"
        },
        {
            "binary_name": "isc-dhcp-relay-dbgsym",
            "binary_version": "4.3.5-3ubuntu5"
        },
        {
            "binary_name": "isc-dhcp-server",
            "binary_version": "4.3.5-3ubuntu5"
        },
        {
            "binary_name": "isc-dhcp-server-dbgsym",
            "binary_version": "4.3.5-3ubuntu5"
        },
        {
            "binary_name": "isc-dhcp-server-ldap",
            "binary_version": "4.3.5-3ubuntu5"
        },
        {
            "binary_name": "isc-dhcp-server-ldap-dbgsym",
            "binary_version": "4.3.5-3ubuntu5"
        }
    ]
}