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.
CVSS Details
- CVSS 3.1 Base Score: 7.5
- CVSS 3.0 Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade memcached | Jun 13, 2018 | Mar 5, 2018 |
| Amazon Linux Ami 2 | — | Upgrade memcachedUpgrade memcached-debuginfoUpgrade memcached-devel | Apr 27, 2020 | Mar 5, 2018 |
| Amazon_linux | — | Upgrade memcached | May 11, 2018 | Mar 5, 2018 |
| Debian | — | Upgrade memcached | Jun 7, 2018 | Mar 5, 2018 |
| Huawei Euleros 2_0_sp2 | — | Upgrade memcached | Dec 4, 2019 | Mar 5, 2018 |
| Huawei Euleros 2_0_sp3 | — | Upgrade memcached | Dec 18, 2019 | Mar 5, 2018 |
| Huawei Euleros 2_0_sp5 | — | Upgrade memcached | Nov 19, 2019 | Mar 5, 2018 |
| Memcached | — | Disable or restrict access to memcached over UDP | Mar 16, 2018 | Feb 27, 2018 |
| Oracle Solaris | — | Upgrade service/memcached to version 1.5.11-11.4.5.0.1.2.0 on Solaris 11.4 | Feb 20, 2019 | Mar 5, 2018 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Mar 5, 2018 |
| Suse | — | Upgrade memcached-develUpgrade memcached | Apr 19, 2018 | Mar 5, 2018 |
| Ubuntu | — | Upgrade memcached | Apr 25, 2018 | Mar 5, 2018 |
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