# CVE-2019-6470: dhcp-client: The Dynamic Host Configuration Protocol (DHCP) is a protocol that allows individual devices on an IP network to get t...

CVE-2019-6470 is fixed in 11 products on 1 platform, first by isc-dhcp-client 4.3.5-3ubuntu7.1, released May 2, 2019. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2019-6470
- Priority: High
- CVSS: 7.5 (Moderate)
- EPSS: 0.0881
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 2, 2019

## Description

The Dynamic Host Configuration Protocol (DHCP) is a protocol that allows individual devices on an IP network to get their own network configuration information, including an IP address, a subnet mask, and a broadcast address. The dhcp packages provide a relay agent and ISC DHCP service required to enable and administer DHCP on a network.  Security Fix(es):  * dhcp: double-deletion of the released addresses in the dhcpv6 code leading to crash and possible DoS (CVE-2019-6470)  For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.  Additional Changes:  For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.1 Release Notes linked from the References section.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | dhcp-client RHEL 8 | 12:4.3.6-34.el8 | [RHSA-2019:3525](https://patchblox.com/security/data/fix/linux/rhsa-2019-3525.md) | Nov 5, 2019 |
| Linux | dhcp-client ol 8 | 12:4.3.6-34.el8 | [ELSA-2019-3525](https://patchblox.com/security/data/fix/linux/elsa-2019-3525.md) | Nov 14, 2019 |
| Linux | dhcp-common RHEL 8 | 12:4.3.6-34.el8 | [RHSA-2019:3525](https://patchblox.com/security/data/fix/linux/rhsa-2019-3525.md) | Nov 5, 2019 |
| Linux | dhcp-common ol 8 | 12:4.3.6-34.el8 | [ELSA-2019-3525](https://patchblox.com/security/data/fix/linux/elsa-2019-3525.md) | Nov 14, 2019 |
| Linux | dhcp-libs RHEL 8 | 12:4.3.6-34.el8 | [RHSA-2019:3525](https://patchblox.com/security/data/fix/linux/rhsa-2019-3525.md) | Nov 5, 2019 |
| Linux | dhcp-libs ol 8 | 12:4.3.6-34.el8 | [ELSA-2019-3525](https://patchblox.com/security/data/fix/linux/elsa-2019-3525.md) | Nov 14, 2019 |
| Linux | dhcp-relay RHEL 8 | 12:4.3.6-34.el8 | [RHSA-2019:3525](https://patchblox.com/security/data/fix/linux/rhsa-2019-3525.md) | Nov 5, 2019 |
| Linux | dhcp-relay ol 8 | 12:4.3.6-34.el8 | [ELSA-2019-3525](https://patchblox.com/security/data/fix/linux/elsa-2019-3525.md) | Nov 14, 2019 |
| Linux | dhcp-server RHEL 8 | 12:4.3.6-34.el8 | [RHSA-2019:3525](https://patchblox.com/security/data/fix/linux/rhsa-2019-3525.md) | Nov 5, 2019 |
| Linux | dhcp-server ol 8 | 12:4.3.6-34.el8 | [ELSA-2019-3525](https://patchblox.com/security/data/fix/linux/elsa-2019-3525.md) | Nov 14, 2019 |
| Linux | isc-dhcp-client Ubuntu 18.04.6 LTS (bionic) | 4.3.5-3ubuntu7.1 | [isc-dhcp-client 4.3.5-3ubuntu7.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-isc-dhcp-client-4.3.5-3ubuntu7.1.md) | May 2, 2019 |
| Linux | isc-dhcp-client-ddns Ubuntu 18.04.6 LTS (bionic) | 4.3.5-3ubuntu7.1 | [isc-dhcp-client-ddns 4.3.5-3ubuntu7.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-isc-dhcp-client-ddns-4.3.5-3ubuntu7.1.md) | May 2, 2019 |
| Linux | isc-dhcp-common Ubuntu 18.04.6 LTS (bionic) | 4.3.5-3ubuntu7.1 | [isc-dhcp-common 4.3.5-3ubuntu7.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-isc-dhcp-common-4.3.5-3ubuntu7.1.md) | May 2, 2019 |
| Linux | isc-dhcp-relay Ubuntu 18.04.6 LTS (bionic) | 4.3.5-3ubuntu7.1 | [isc-dhcp-relay 4.3.5-3ubuntu7.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-isc-dhcp-relay-4.3.5-3ubuntu7.1.md) | May 2, 2019 |
| Linux | isc-dhcp-server Ubuntu 18.04.6 LTS (bionic) | 4.3.5-3ubuntu7.1 | [isc-dhcp-server 4.3.5-3ubuntu7.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-isc-dhcp-server-4.3.5-3ubuntu7.1.md) | May 2, 2019 |
| Linux | isc-dhcp-server-ldap Ubuntu 18.04.6 LTS (bionic) | 4.3.5-3ubuntu7.1 | [isc-dhcp-server-ldap 4.3.5-3ubuntu7.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-isc-dhcp-server-ldap-4.3.5-3ubuntu7.1.md) | May 2, 2019 |

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