USN-3973-1

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Source
https://ubuntu.com/security/notices/USN-3973-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-3973-1.json
JSON Data
https://api.test.osv.dev/v1/vulns/USN-3973-1
Upstream
Related
Published
2019-05-13T14:00:37.383905Z
Modified
2025-10-13T04:34:49Z
Summary
isc-dhcp vulnerability
Details

It was discovered that DHCP, when built with a mismatched external BIND library, incorrectly handled certain memory operations. A remote attacker could possibly use this issue to cause DHCP to crash, resulting in a denial of service.

References

Affected packages

Ubuntu:18.04:LTS / isc-dhcp

Package

Name
isc-dhcp
Purl
pkg:deb/ubuntu/isc-dhcp@4.3.5-3ubuntu7.1?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.3.5-3ubuntu7.1

Affected versions

4.*

4.3.5-3ubuntu2
4.3.5-3ubuntu3
4.3.5-3ubuntu4
4.3.5-3ubuntu5
4.3.5-3ubuntu6
4.3.5-3ubuntu7

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "4.3.5-3ubuntu7.1",
            "binary_name": "isc-dhcp-client"
        },
        {
            "binary_version": "4.3.5-3ubuntu7.1",
            "binary_name": "isc-dhcp-client-ddns"
        },
        {
            "binary_version": "4.3.5-3ubuntu7.1",
            "binary_name": "isc-dhcp-common"
        },
        {
            "binary_version": "4.3.5-3ubuntu7.1",
            "binary_name": "isc-dhcp-dev"
        },
        {
            "binary_version": "4.3.5-3ubuntu7.1",
            "binary_name": "isc-dhcp-relay"
        },
        {
            "binary_version": "4.3.5-3ubuntu7.1",
            "binary_name": "isc-dhcp-server"
        },
        {
            "binary_version": "4.3.5-3ubuntu7.1",
            "binary_name": "isc-dhcp-server-ldap"
        }
    ],
    "availability": "No subscription required"
}

Database specific

cves_map

{
    "ecosystem": "Ubuntu:18.04:LTS",
    "cves": [
        {
            "id": "CVE-2019-6470",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "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:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ]
}