# CVE-2017-3144: Failure to properly clean up closed OMAPI connections can exhaust available sockets

> Attackers can exhaust socket descriptors by failing to clean up closed OMAPI connections, causing denial of service in ISC DHCP.

- **Severity:** Medium 5.3 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 16 Jan 2019
- **Updated:** 16 Sep 2024
- **Also known as:** DEBIAN-CVE-2017-3144, GHSA-4wqw-h6w8-f8qg, MGASA-2017-0458, RHSA-2018:0158, SUSE-SU-2018:0444-1, SUSE-SU-2018:0532-1, UBUNTU-CVE-2017-3144

## What is CVE-2017-3144?

CVE-2017-3144 is a medium-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 16 Jan 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official 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.

Weakness: CWE-400 (Uncontrolled Resource Consumption)

## Which versions are affected by CVE-2017-3144?

It affects 9 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `dhclient` | Red Hat:enterprise_linux:7::client | All versions | 12:4.2.5-58.el7_4.1 |
| `dhcp` | Red Hat:enterprise_linux:7::client | All versions | 12:4.2.5-58.el7_4.1 |
| `dhcp-common` | Red Hat:enterprise_linux:7::client | All versions | 12:4.2.5-58.el7_4.1 |
| `dhcp-debuginfo` | Red Hat:enterprise_linux:7::client | All versions | 12:4.2.5-58.el7_4.1 |
| `dhcp-devel` | Red Hat:enterprise_linux:7::client | All versions | 12:4.2.5-58.el7_4.1 |
| `dhcp-libs` | Red Hat:enterprise_linux:7::client | All versions | 12:4.2.5-58.el7_4.1 |
| `dhclient` | Red Hat:enterprise_linux:7::computenode | All versions | 12:4.2.5-58.el7_4.1 |
| `dhcp` | Red Hat:enterprise_linux:7::computenode | All versions | 12:4.2.5-58.el7_4.1 |
| `dhcp-common` | Red Hat:enterprise_linux:7::computenode | All versions | 12:4.2.5-58.el7_4.1 |
| `dhcp-debuginfo` | Red Hat:enterprise_linux:7::computenode | All versions | 12:4.2.5-58.el7_4.1 |
| `dhcp-devel` | Red Hat:enterprise_linux:7::computenode | All versions | 12:4.2.5-58.el7_4.1 |
| `dhcp-libs` | Red Hat:enterprise_linux:7::computenode | All versions | 12:4.2.5-58.el7_4.1 |
| `dhclient` | Red Hat:enterprise_linux:7::server | All versions | 12:4.2.5-58.el7_4.1 |
| `dhcp` | Red Hat:enterprise_linux:7::server | All versions | 12:4.2.5-58.el7_4.1 |
| `dhcp-common` | Red Hat:enterprise_linux:7::server | All versions | 12:4.2.5-58.el7_4.1 |
| `dhcp-debuginfo` | Red Hat:enterprise_linux:7::server | All versions | 12:4.2.5-58.el7_4.1 |
| `dhcp-devel` | Red Hat:enterprise_linux:7::server | All versions | 12:4.2.5-58.el7_4.1 |
| `dhcp-libs` | Red Hat:enterprise_linux:7::server | All versions | 12:4.2.5-58.el7_4.1 |
| `dhclient` | Red Hat:enterprise_linux:7::workstation | All versions | 12:4.2.5-58.el7_4.1 |
| `dhcp` | Red Hat:enterprise_linux:7::workstation | All versions | 12:4.2.5-58.el7_4.1 |
| `dhcp-common` | Red Hat:enterprise_linux:7::workstation | All versions | 12:4.2.5-58.el7_4.1 |
| `dhcp-debuginfo` | Red Hat:enterprise_linux:7::workstation | All versions | 12:4.2.5-58.el7_4.1 |
| `dhcp-devel` | Red Hat:enterprise_linux:7::workstation | All versions | 12:4.2.5-58.el7_4.1 |
| `dhcp-libs` | Red Hat:enterprise_linux:7::workstation | All versions | 12:4.2.5-58.el7_4.1 |
| `dhcp` | SUSE:Linux Enterprise Desktop 12 SP2 | All versions | 4.3.3-10.11.1 |
| `dhcp` | SUSE:Linux Enterprise Desktop 12 SP3 | All versions | 4.3.3-10.11.1 |
| `dhcp` | SUSE:Linux Enterprise Server 11 SP4 | All versions | 4.2.4.P2-0.28.5.3 |
| `dhcp` | SUSE:Linux Enterprise Server 12 SP2 | All versions | 4.3.3-10.11.1 |
| `dhcp` | SUSE:Linux Enterprise Server 12 SP3 | All versions | 4.3.3-10.11.1 |
| `dhcp` | SUSE:Linux Enterprise Server for Raspberry Pi 12 SP2 | All versions | 4.3.3-10.11.1 |
| `dhcp` | SUSE:Linux Enterprise Server for SAP Applications 11 SP4 | All versions | 4.2.4.P2-0.28.5.3 |
| `dhcp` | SUSE:Linux Enterprise Server for SAP Applications 12 SP2 | All versions | 4.3.3-10.11.1 |
| `dhcp` | SUSE:Linux Enterprise Server for SAP Applications 12 SP3 | All versions | 4.3.3-10.11.1 |
| `dhcp` | SUSE:Linux Enterprise Software Development Kit 11 SP4 | All versions | 4.2.4.P2-0.28.5.3 |
| `dhcp` | SUSE:Linux Enterprise Software Development Kit 12 SP2 | All versions | 4.3.3-10.11.1 |
| `dhcp` | SUSE:Linux Enterprise Software Development Kit 12 SP3 | All versions | 4.3.3-10.11.1 |

Products: Canonical Ubuntu Linux, Debian Debian Linux, Isc Dhcp, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server, Redhat Enterprise Linux Server Aus, Redhat Enterprise Linux Server Eus, Redhat Enterprise Linux Server Tus, Redhat Enterprise Linux Workstation.

## How do I fix CVE-2017-3144?

Upgrade to a fixed version.

## Is CVE-2017-3144 being exploited?

There is no known exploitation of CVE-2017-3144 in the wild and no public exploit code.

## Other vulnerabilities in Canonical Ubuntu Linux

- [CVE-2020-11651](https://insights.sbomify.com/CVE-2020-11651/): SaltStack Salt Authentication Bypass (critical 9.8, exploited in the wild)
- [CVE-2020-7247](https://insights.sbomify.com/CVE-2020-7247/): OpenSMTPD Remote Code Execution (critical 9.8, exploited in the wild)
- [CVE-2019-16928](https://insights.sbomify.com/CVE-2019-16928/): Exim Out-of-bounds Write (critical 9.8, exploited in the wild)
- [CVE-2018-6789](https://insights.sbomify.com/CVE-2018-6789/): Exim Buffer Overflow (critical 9.8, exploited in the wild)
- [CVE-2015-2590](https://insights.sbomify.com/CVE-2015-2590/): Oracle Java SE and Java SE Embedded Remote Code Execution (critical 9.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-3144 and fix it if it is affected.

What it is: CVE-2017-3144 is a medium-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 16 Jan 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2017-3144 in the wild and no public exploit code.

Affected product: Canonical Ubuntu Linux. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2017-3144/ (Markdown: https://insights.sbomify.com/CVE-2017-3144/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-3144
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-3144
- OSV: https://osv.dev/vulnerability/CVE-2017-3144

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-3144/
Summaries are generated and may contain mistakes; the official description above is the record.