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
2025-07-16T08:53:56.761533Z
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 

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