NVD Vulnerability Detail

CVE-2018-16886

Summary	etcd versions 3.2.x before 3.2.26 and 3.3.x before 3.3.11 are vulnerable to an improper authentication issue when role-based access control (RBAC) is used and client-cert-auth is enabled. If an etcd client server TLS certificate contains a Common Name (CN) which matches a valid RBAC username, a remote attacker may authenticate as that user with any valid (trusted) client certificate in a REST API request to the gRPC-gateway.
Publication Date	Jan. 15, 2019, 4:29 a.m.
Registration Date	March 1, 2021, 7:05 p.m.
Last Update	Nov. 21, 2024, 12:53 p.m.

CVSS3.1 : HIGH
スコア	8.1
Vector	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
攻撃元区分(AV)	ネットワーク
攻撃条件の複雑さ(AC)	高
攻撃に必要な特権レベル(PR)	不要
利用者の関与(UI)	不要
影響の想定範囲(S)	変更なし
機密性への影響(C)	高
完全性への影響(I)	高
可用性への影響(A)	高

CVSS2.0 : MEDIUM
Score	6.8
Vector	AV:N/AC:M/Au:N/C:P/I:P/A:P
攻撃元区分(AV)	ネットワーク
攻撃条件の複雑さ(AC)	中
攻撃前の認証要否(Au)	不要
機密性への影響(C)	低
完全性への影響(I)	低
可用性への影響(A)	低
Get all privileges.	いいえ
Get user privileges	いいえ
Get other privileges	いいえ
User operation required	いいえ

Affected software configurations

Configuration1	or higher	or less	more than	less than
cpe:2.3:a:etcd:etcd::::::::	3.2.0			3.2.26
cpe:2.3:a:etcd:etcd::::::::	3.3.0			3.3.11

Configuration2	or higher	or less	more than	less than
cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:::::::*
cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:::::::*
cpe:2.3:o:redhat:enterprise_linux_server:7.0:::::::*

Configuration3		or higher	or less	more than	less than
cpe:2.3:o:fedoraproject:fedora:30:::::::*

Related information, measures and tools

No	URL	タグ
1	http://www.securityfocus.com/bid/106540	Third Party Advisory VDB Entry
2	http://www.securityfocus.com/bid/106540	Third Party Advisory VDB Entry
3	https://access.redhat.com/errata/RHSA-2019:0237	Third Party Advisory
4	https://access.redhat.com/errata/RHSA-2019:0237	Third Party Advisory
5	https://access.redhat.com/errata/RHSA-2019:1352	Third Party Advisory
6	https://access.redhat.com/errata/RHSA-2019:1352	Third Party Advisory
7	https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16886	Issue Tracking Patch Third Party Advisory
8	https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16886	Issue Tracking Patch Third Party Advisory
9	https://github.com/etcd-io/etcd/blob/1eee465a43720d713bb69f7b7f5e120135fdb1ac/CHANGELOG-3.2.md#security-authentication	Release Notes
10	https://github.com/etcd-io/etcd/blob/1eee465a43720d713bb69f7b7f5e120135fdb1ac/CHANGELOG-3.2.md#security-authentication	Release Notes
11	https://github.com/etcd-io/etcd/blob/1eee465a43720d713bb69f7b7f5e120135fdb1ac/CHANGELOG-3.3.md#security-authentication	Release Notes
12	https://github.com/etcd-io/etcd/blob/1eee465a43720d713bb69f7b7f5e120135fdb1ac/CHANGELOG-3.3.md#security-authentication	Release Notes
13	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JX7QTIT465BQGRGNCE74RATRQLKT2QE4/
14	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JX7QTIT465BQGRGNCE74RATRQLKT2QE4/
15	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UPGYHMSKDPW5GAMI7BEP3XQRVRLLBJKS/
16	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UPGYHMSKDPW5GAMI7BEP3XQRVRLLBJKS/

Common Vulnerabilities List

No	CWE	Name	URL
1	CWE-287	不適切な認証	https://cwe.mitre.org/data/definitions/287.html

JVN Vulnerability Information

etcd における認証に関する脆弱性

Title	etcd における認証に関する脆弱性
Summary	etcd には、認証に関する脆弱性が存在します。
Possible impacts	情報を取得される、情報を改ざんされる、およびサービス運用妨害 (DoS) 状態にされる可能性があります。
Solution	ベンダより正式な対策が公開されています。ベンダ情報を参照して適切な対策を実施してください。
Publication Date	Nov. 19, 2018, midnight
Registration Date	Feb. 28, 2019, 5:07 p.m.
Last Update	Feb. 28, 2019, 5:07 p.m.

Affected System

レッドハット

etcd 3.2.26 未満の 3.2.x

etcd 3.3.11 未満の 3.3.x

etcd 3.2.26 未満の 3.2.x

etcd 3.3.11 未満の 3.3.x

Red Hat Enterprise Linux Server

CVE (情報セキュリティ共通脆弱性識別子)

No	Name	URL
Common Vulnerabilities and Exposures (CVE)
1	CVE-2018-16886	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-16886
2	CVE-2018-16886	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-16886
National Vulnerability Database (NVD)
3	CVE-2018-16886	https://nvd.nist.gov/vuln/detail/CVE-2018-16886
4	CVE-2018-16886	https://nvd.nist.gov/vuln/detail/CVE-2018-16886

CWE (共通脆弱性タイプ一覧)

No	Name	URL
JVNDB
1	CWE-287	https://jvndb.jvn.jp/ja/cwe/CWE-287.html
2	CWE-287	https://jvndb.jvn.jp/ja/cwe/CWE-287.html

ベンダー情報

No	Name	URL
GitHub
1	etcd / CHANGELOG-3.2.md	https://github.com/etcd-io/etcd/blob/1eee465a43720d713bb69f7b7f5e120135fdb1ac/CHANGELOG-3.2.md#security-authentication
2	etcd / CHANGELOG-3.2.md	https://github.com/etcd-io/etcd/blob/1eee465a43720d713bb69f7b7f5e120135fdb1ac/CHANGELOG-3.2.md#security-authentication
3	etcd / CHANGELOG-3.3.md	https://github.com/etcd-io/etcd/blob/1eee465a43720d713bb69f7b7f5e120135fdb1ac/CHANGELOG-3.3.md#security-authentication
4	etcd / CHANGELOG-3.3.md	https://github.com/etcd-io/etcd/blob/1eee465a43720d713bb69f7b7f5e120135fdb1ac/CHANGELOG-3.3.md#security-authentication
Red Hat Bugzilla
5	Bug 1651034	https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16886
6	Bug 1651034	https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16886
Red Hat Security Advisory
7	RHSA-2019:0237	https://access.redhat.com/errata/RHSA-2019:0237
8	RHSA-2019:0237	https://access.redhat.com/errata/RHSA-2019:0237

Change Log

No	Changed Details	Date of change
1	[2019年02月28日] 掲載	Feb. 28, 2019, 5:07 p.m.
1	[2019年02月28日] 掲載	Feb. 28, 2019, 5:07 p.m.