What’s Vulnerable › Vulnerabilities

CVE-2018-1000115

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 88.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-03-05 · updated 2026-06-17
• Weakness: CWE-400

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

• Canonical Ubuntu Linux: 14.04, 16.04, 17.10
• Debian Linux: 8.0, 9.0
• Memcached: 1.5.5
• OpenStack: 8, 9, 10, 11, 12

References

• https://access.redhat.com/errata/RHBA-2018:2140
• https://access.redhat.com/errata/RHSA-2018:1593
• https://access.redhat.com/errata/RHSA-2018:1627
• https://access.redhat.com/errata/RHSA-2018:2331
• https://access.redhat.com/errata/RHSA-2018:2857
• https://blogs.akamai.com/2018/03/memcached-fueled-13-tbps-attacks.html
• https://github.com/memcached/memcached/commit/dbb7a8af90054bf4ef51f5814ef7ceb17d83d974
• https://github.com/memcached/memcached/issues/348
• https://github.com/memcached/memcached/wiki/ReleaseNotes156
• https://twitter.com/dormando/status/968579781729009664
• https://usn.ubuntu.com/3588-1/
• https://www.debian.org/security/2018/dsa-4218

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