CVE-2018-1000115

Exp

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.

Published: 2018-03-05 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-1000115 is rated High Exploit Risk (82.6/100): CVSS High severity, with high exploitation likelihood (EPSS 86.75%, 99th percentile). 4 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +2.76% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2018-1000115

EDB-ID Source Kind Published Link
44265 exploit_db edb 2018-03-08 Exploit-DB ↗
44264 exploit_db edb 2018-03-05 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2018-1000115

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-03 84.00% 86.75% +2.76%
2 2026-05-29 83.63% 84.00% +0.37%
3 2026-05-17 — 83.63% —

Full EPSS history (26 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-1000115

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.0 HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2018-1000115

OS Trackers for CVE-2018-1000115

vendor priority summary link
debian not yet assigned CVE-2018-1000115 not yet assigned priority: Debian including 1 source packages (memcached), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2018-1000115
redhat medium — https://access.redhat.com/security/cve/CVE-2018-1000115
ubuntu low CVE-2018-1000115 low priority: Ubuntu including 1 source packages (memcached), 4 status rows across 4 suites (artful, trusty, upstream, xenial): released 4. https://ubuntu.com/security/CVE-2018-1000115

Affected software / configurations for CVE-2018-1000115

Vendor Product Version Raw CPE
memcached memcached 1.5.5 cpe:2.3:a:memcached:memcached:1.5.5:*:*:*:*:*:*:*
canonical ubuntu_linux 14.04 cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 16.04 cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 17.10 cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*
debian debian_linux 8.0 cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
debian debian_linux 9.0 cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
redhat openstack 8 cpe:2.3:a:redhat:openstack:8:*:*:*:*:*:*:*
redhat openstack 9 cpe:2.3:a:redhat:openstack:9:*:*:*:*:*:*:*
redhat openstack 10 cpe:2.3:a:redhat:openstack:10:*:*:*:*:*:*:*
redhat openstack 11 cpe:2.3:a:redhat:openstack:11:*:*:*:*:*:*:*
redhat openstack 12 cpe:2.3:a:redhat:openstack:12:*:*:*:*:*:*:*

References for CVE-2018-1000115

URL Tags
https://access.redhat.com/errata/RHBA-2018:2140 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:1593 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:1627 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:2331 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:2857 Third Party Advisory
https://blogs.akamai.com/2018/03/memcached-fueled-13-tbps-attacks.html Third Party Advisory
https://github.com/memcached/memcached/commit/dbb7a8af90054bf4ef51f5814ef7ceb17d83d974 Patch Third Party Advisory
https://github.com/memcached/memcached/issues/348 Issue Tracking Third Party Advisory
https://github.com/memcached/memcached/wiki/ReleaseNotes156 Third Party Advisory
https://twitter.com/dormando/status/968579781729009664 Third Party Advisory
https://usn.ubuntu.com/3588-1/ Third Party Advisory
https://www.debian.org/security/2018/dsa-4218 Third Party Advisory
https://www.exploit-db.com/exploits/44264/ Exploit Third Party Advisory VDB Entry
https://www.exploit-db.com/exploits/44265/ Exploit Third Party Advisory VDB Entry
https://www.synology.com/support/security/Synology_SA_18_07 Third Party Advisory
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