USN-3586-1

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

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",
    "binaries": [
        {
            "binary_version": "4.2.4-7ubuntu12.12",
            "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-dev"
        },
        {
            "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"
        }
    ]
}

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",
    "binaries": [
        {
            "binary_version": "4.3.3-5ubuntu12.9",
            "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-dev"
        },
        {
            "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"
        }
    ]
}