# CVE-2017-3144: isc-dhcp-client: A vulnerability stemming from failure to properly clean up closed OMAPI connections can lead to exhaustion of the poo...

CVE-2017-3144 is fixed in 6 products on 1 platform, first by isc-dhcp-client 4.3.5-3ubuntu5, released February 28, 2018. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2017-3144
- Priority: Routine
- CVSS: n/a (Low)
- EPSS: 0.7272
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 30, 2017

## Description

A vulnerability stemming from failure to properly clean up closed OMAPI connections can lead to exhaustion of the pool of socket descriptors available to the DHCP server. Affects ISC DHCP 4.1.0 to 4.1-ESV-R15, 4.2.0 to 4.2.8, 4.3.0 to 4.3.6. Older versions may also be affected but are well beyond their end-of-life (EOL). Releases prior to 4.1.0 have not been tested.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | isc-dhcp-client Ubuntu 18.04.6 LTS (bionic) | 4.3.5-3ubuntu5 | [isc-dhcp-client 4.3.5-3ubuntu5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-isc-dhcp-client-4.3.5-3ubuntu5.md) | Feb 28, 2018 |
| Linux | isc-dhcp-client-ddns Ubuntu 18.04.6 LTS (bionic) | 4.3.5-3ubuntu5 | [isc-dhcp-client-ddns 4.3.5-3ubuntu5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-isc-dhcp-client-ddns-4.3.5-3ubuntu5.md) | Feb 28, 2018 |
| Linux | isc-dhcp-common Ubuntu 18.04.6 LTS (bionic) | 4.3.5-3ubuntu5 | [isc-dhcp-common 4.3.5-3ubuntu5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-isc-dhcp-common-4.3.5-3ubuntu5.md) | Feb 28, 2018 |
| Linux | isc-dhcp-relay Ubuntu 18.04.6 LTS (bionic) | 4.3.5-3ubuntu5 | [isc-dhcp-relay 4.3.5-3ubuntu5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-isc-dhcp-relay-4.3.5-3ubuntu5.md) | Feb 28, 2018 |
| Linux | isc-dhcp-server Ubuntu 18.04.6 LTS (bionic) | 4.3.5-3ubuntu5 | [isc-dhcp-server 4.3.5-3ubuntu5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-isc-dhcp-server-4.3.5-3ubuntu5.md) | Feb 28, 2018 |
| Linux | isc-dhcp-server-ldap Ubuntu 18.04.6 LTS (bionic) | 4.3.5-3ubuntu5 | [isc-dhcp-server-ldap 4.3.5-3ubuntu5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-isc-dhcp-server-ldap-4.3.5-3ubuntu5.md) | Feb 28, 2018 |

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Data as of 2026-11-07T12:40:37Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo