CVE-2018-1000115
HighPublic exploitMemcached 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…
Published Mar 5, 2018 · Updated Aug 4, 2026 · Also known as ALPINE-CVE-2018-1000115, DEBIAN-CVE-2018-1000115, SUSE-RU-2018:1071-1, SUSE-SU-2018:0955-1, SUSE-SU-2018:1103-1, SUSE-SU-2018:1326-1, UBUNTU-CVE-2018-1000115
Key Facts
Patch immediately- CVE-2018-1000115 is a high-severity vulnerability (CVSS 7.5 v3.1) affecting Memcached, Openstack (Redhat), Ubuntu Linux (Canonical) and 22 more products.
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 88% probability of exploitation in the next 30 days.
- Fixed versions are available, including ansible 2.2.3.0-12.2, crowbar-core 4.0+git.1580209654.1d112d31f-9.66.5, crowbar-core-branding-upstream 4.0+git.1580209654.1d112d31f-9.66.5.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
7.5
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS (30-day exploit likelihood)
88%
Higher than 99.7% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2018-1000115 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
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.
Affected Products
158 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| MemcachedMemcached | 1.5.5 | 1.5.6-1 |
| OpenstackRedhat | 10, 11, 12, 8, 9 | n/a |
| Ubuntu LinuxCanonical | 14.04, 16.04, 17.10 | n/a |
| Debian LinuxDebian | 8.0, 9.0 | n/a |
| memcached-develamazon | See advisory | 1.4.15-10.15.amzn1 |
Patched Releases
ansible
2.2.3.0-12.2
crowbar-core
4.0+git.1580209654.1d112d31f-9.66.5
crowbar-core-branding-upstream
4.0+git.1580209654.1d112d31f-9.66.5
crowbar-ha
4.0+git.1521473535.67d2302-4.28.1, 4.0+git.1585316203.d6ad2c8-4.52.4
crowbar-openstack
3.0+git.1521471181.2b39130da-39.10.1, 4.0+git.1522325467.43e431f91-9.30.1, 4.0+git.1589804581.9972163f0-9.71.4
grafana
4.6.5-1.14.1
instack-undercloud
0:2.2.7-13.el7ost
keepalived
2.0.19-1.8.1
kibana
4.6.3-5.1
Memcached
1.2.6-5.17.3.1, 1.4.14-0ubuntu9.2, 1.4.15-10.15.amzn1, 1.4.15-10.amzn2.1.1, 1.4.21-1.1+deb8u2, 1.4.25-2ubuntu1.3, 1.4.33-1+deb9u1, 1.4.33-r2, 1.4.36-r2, 1.4.39-11.6.1, 1.4.39-4.6.1, 1.5.17-3.6.1, 1.5.6-1, 1.6.9-2.3
memcached-devel
1.4.15-10.15.amzn1, 1.4.15-10.amzn2.1.1, 1.4.39-11.6.1, 1.6.9-2.3
monasca-installer
20180608_12.47-12.1
openstack-dashboard-theme-SUSE
2016.2-5.12.4
openstack-manila
3.0.1~dev30-4.12.2
openstack-manila-api
3.0.1~dev30-4.12.2
openstack-manila-data
3.0.1~dev30-4.12.2
openstack-manila-doc
3.0.1~dev30-4.12.3
openstack-manila-scheduler
3.0.1~dev30-4.12.2
openstack-manila-share
3.0.1~dev30-4.12.2
openstack-neutron-fwaas
9.0.2~dev5-4.9.3
openstack-neutron-fwaas-doc
9.0.2~dev5-4.9.4
openstack-nova
14.0.11~dev13-4.40.2
openstack-nova-api
14.0.11~dev13-4.40.2
openstack-nova-cells
14.0.11~dev13-4.40.2
openstack-nova-cert
14.0.11~dev13-4.40.2
Timeline
Publicly disclosed
Mar 5, 2018
Last updated
Aug 4, 2026
Weakness Type
- CWE-400 Uncontrolled Resource Consumption
References
- advisoryRHBA-2018:2140
- advisoryRHSA-2018:1593
- advisoryRHSA-2018:1627
- advisoryRHSA-2018:2331
- advisoryRHSA-2018:2857
FAQ
Common Questions.
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).
Affected: Memcached versions 1.5.5; Openstack (Redhat) versions 10, 11, 12, 8, 9; Ubuntu Linux (Canonical) versions 14.04, 16.04, 17.10, among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including ansible 2.2.3.0-12.2, crowbar-core 4.0+git.1580209654.1d112d31f-9.66.5, crowbar-core-branding-upstream 4.0+git.1580209654.1d112d31f-9.66.5.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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