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Fencer Intel
medium 5.8

CVE-2020-15115 json

No minimum password length in etcd

published 6y ago modified last mo. also GHSA-4993-m7g5-r9hh , EUVD-2022-7012

cvss
5.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.3%
EPSS 1.3% chance of exploitation in 30 days, percentile 71%
public exploits
0
none known

Summary

etcd before versions 3.3.23 and 3.4.10 does not perform any password length validation, which allows for very short passwords, such as those with a length of one. This may allow an attacker to guess or brute-force users' passwords with little computational effort.

Patch / fix

  • go go.etcd.io/etcd/client/v3 3.3.23, 3.4.10
  • redhat etcd 3.3.23, 3.4.10
  • etcd Debian 14, Debian 13, Debian 12 3.3.25+dfsg-5

debian advisories DEBIAN-CVE-2020-15115

  • etcd openstack 16.1 3.3.23-1.el8ost

red hat advisories RHSA-2021:0916

  • etcd CBL-Mariner 2.0 3.5.0-3

azure linux advisories AZL-6392

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-15115 updated cvss 7.5

etcd: improper validation of passwords allow an attacker to guess or brute-force user's passwords

  • Red Hat Enterprise Linux 7 etcd
    affected: no fix planned “Will not fix”
  • Red Hat OpenStack Platform 15 (Stein) etcd
    affected: no fix available “Fix deferred”
  • Red Hat Storage 3 etcd
    affected: no fix planned “Will not fix”
  • Red Hat OpenStack Platform 16.1 etcd 3.3.23-1.el8ost
    fixed: vendor fix RHSA-2021:0916
  • Red Hat Advanced Cluster Management for Kubernetes 2 etcd Red Hat OpenShift Container Platform 4 openshift4/ose-etcd
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.34% chance of exploitation in the next 30 days, higher than 71% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 5.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:P/I:N/A:N
GitHub 3.1 5.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N

Affected packages

ecosystem package affected fixed in
go go.etcd.io/etcd/client/v3
>=3.4.0, <3.4.10
<3.3.23
3.4.10
3.3.23

Affected products

  • etcd-io etcd

Classification

Weakness
  • CWE-521 Weak Password Requirements

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.