# CVE-2018-1000115: Denial of service in n/a

> Attackers can cause denial of service via UDP traffic amplification if UDP support is enabled in Memcached.

- **Severity:** High 7.5 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 5 Mar 2018
- **Updated:** 5 Aug 2024
- **Also known as:** ALPINE-CVE-2018-1000115, DEBIAN-CVE-2018-1000115, GHSA-f4xm-w85j-gc55, MGASA-2018-0165, RHBA-2018:2140, RHSA-2018:2331, RHSA-2018:2857, SUSE-RU-2018:1071-1, SUSE-SU-2018:0955-1, SUSE-SU-2018:1103-1, SUSE-SU-2018:1326-1, UBUNTU-CVE-2018-1000115

## What is CVE-2018-1000115?

CVE-2018-1000115 is a high-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 5 Mar 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Memcached version 1.5.5 contains an Insufficient Control of Network Message Volume (Network Amplification, CWE-406) vulnerability in the UDP support of the memcached server that can result in denial of service via network flood (traffic amplification of 1:50,000 has been reported by reliable sources). This attack appear to be exploitable via network connectivity to port 11211 UDP. This vulnerability appears to have been fixed in 1.5.6 due to the disabling of the UDP protocol by default.

Weakness: CWE-400 (Uncontrolled Resource Consumption)

## Which versions are affected by CVE-2018-1000115?

It affects 4 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `instack-undercloud` | Red Hat:openstack-director:8::el7 | All versions | 0:2.2.7-13.el7ost |
| `openstack-tripleo-heat-templates` | Red Hat:openstack-director:8::el7 | All versions | 0:0.8.14-42.el7ost |
| `openstack-tripleo-heat-templates-kilo` | Red Hat:openstack-director:8::el7 | All versions | 0:0.8.14-42.el7ost |
| `instack-undercloud` | Red Hat:openstack-director:9::el7 | All versions | 0:4.0.0-18.el7ost |
| `openstack-tripleo-heat-templates` | Red Hat:openstack-director:9::el7 | All versions | 0:2.0.0-65.el7ost |
| `openstack-tripleo-heat-templates-liberty` | Red Hat:openstack-director:9::el7 | All versions | 0:2.0.0-65.el7ost |
| `instack-undercloud` | Red Hat:openstack:12::el7 | All versions | 0:7.4.12-1.el7ost |
| `openstack-tripleo-common` | Red Hat:openstack:12::el7 | All versions | 0:7.6.13-3.el7ost |
| `openstack-tripleo-common-container-base` | Red Hat:openstack:12::el7 | All versions | 0:7.6.13-3.el7ost |
| `openstack-tripleo-common-containers` | Red Hat:openstack:12::el7 | All versions | 0:7.6.13-3.el7ost |
| `openstack-tripleo-common-devtools` | Red Hat:openstack:12::el7 | All versions | 0:7.6.13-3.el7ost |
| `openstack-tripleo-heat-templates` | Red Hat:openstack:12::el7 | All versions | 0:7.0.12-8.el7ost |
| `openstack-tripleo-image-elements` | Red Hat:openstack:12::el7 | All versions | 0:7.0.5-1.el7ost |
| `openstack-tripleo-puppet-elements` | Red Hat:openstack:12::el7 | All versions | 0:7.0.7-1.el7ost |
| `os-net-config` | Red Hat:openstack:12::el7 | All versions | 0:7.3.6-1.el7ost |
| `puppet-aodh` | Red Hat:openstack:12::el7 | All versions | 0:11.4.0-2.el7ost |
| `puppet-ceilometer` | Red Hat:openstack:12::el7 | All versions | 0:11.5.0-2.el7ost |
| `puppet-ceph` | Red Hat:openstack:12::el7 | All versions | 0:2.4.2-2.el7ost |
| `puppet-cinder` | Red Hat:openstack:12::el7 | All versions | 0:11.5.0-4.el7ost |
| `puppet-glance` | Red Hat:openstack:12::el7 | All versions | 0:11.5.0-2.el7ost |
| `puppet-heat` | Red Hat:openstack:12::el7 | All versions | 0:11.5.0-2.el7ost |
| `puppet-ironic` | Red Hat:openstack:12::el7 | All versions | 0:11.5.0-2.el7ost |
| `puppet-keystone` | Red Hat:openstack:12::el7 | All versions | 0:11.4.0-2.el7ost |
| `puppet-manila` | Red Hat:openstack:12::el7 | All versions | 0:11.4.0-4.el7ost |
| `puppet-mistral` | Red Hat:openstack:12::el7 | All versions | 0:11.4.0-2.el7ost |
| `puppet-neutron` | Red Hat:openstack:12::el7 | All versions | 0:11.5.0-2.el7ost |
| `puppet-nova` | Red Hat:openstack:12::el7 | All versions | 0:11.5.0-4.el7ost |
| `puppet-panko` | Red Hat:openstack:12::el7 | All versions | 0:11.5.0-2.el7ost |
| `puppet-tripleo` | Red Hat:openstack:12::el7 | All versions | 0:7.4.12-8.el7ost |
| `puppet-trove` | Red Hat:openstack:12::el7 | All versions | 0:11.4.0-2.el7ost |
| `python-novajoin` | Red Hat:openstack:12::el7 | All versions | 0:1.0.17-3.el7ost |
| `python-os-brick` | Red Hat:openstack:12::el7 | All versions | 0:1.15.5-2.el7ost |
| `python-tripleoclient` | Red Hat:openstack:12::el7 | All versions | 0:7.3.10-3.el7ost |
| `memcached` | SUSE:Linux Enterprise Server 12 SP3 | All versions | 1.4.39-4.6.1 |
| `memcached` | SUSE:Linux Enterprise Server for SAP Applications 12 SP3 | All versions | 1.4.39-4.6.1 |
| `memcached` | SUSE:Linux Enterprise Software Development Kit 11 SP4 | All versions | 1.2.6-5.17.3.1 |
| `crowbar-openstack` | SUSE:OpenStack Cloud 6 | All versions | 3.0+git.1521471181.2b39130da-39.10.1 |
| `crowbar-ha` | SUSE:OpenStack Cloud 7 | All versions | 4.0+git.1521473535.67d2302-4.28.1 |
| `crowbar-openstack` | SUSE:OpenStack Cloud 7 | All versions | 4.0+git.1522325467.43e431f91-9.30.1 |
| `memcached` | SUSE:Studio Onsite 1.3 | All versions | 1.2.6-5.17.3.1 |

Products: Canonical Ubuntu Linux, Debian Debian Linux, Memcached Memcached, Redhat Openstack.

## How do I fix CVE-2018-1000115?

Change a configuration setting.

## Is CVE-2018-1000115 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-1000115 exists.

Public exploit code:

- Memcached Stats Amplification Scanner (metasploit)
- Memcached 1.5.5 - 'Memcrashed' Insufficient Control Network Message Volume Denial of Service (1) (exploitdb)
- Memcached 1.5.5 - 'Memcrashed ' Insufficient Control of Network Message Volume Denial of Service With Shodan API (exploitdb)

## 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-2018-1000115 and fix it if it is affected.

What it is: CVE-2018-1000115 is a high-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 5 Mar 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-1000115 exists.

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-2018-1000115/ (Markdown: https://insights.sbomify.com/CVE-2018-1000115/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-1000115
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-1000115
- OSV: https://osv.dev/vulnerability/CVE-2018-1000115

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-1000115/
Summaries are generated and may contain mistakes; the official description above is the record.