NVD Vulnerability Detail

CVE-2020-12662

Summary	Unbound before 1.10.1 has Insufficient Control of Network Message Volume, aka an "NXNSAttack" issue. This is triggered by random subdomains in the NSDNAME in NS records.
Publication Date	May 19, 2020, 11:15 p.m.
Registration Date	Jan. 26, 2021, 11:51 a.m.
Last Update	Nov. 21, 2024, 2 p.m.

CVSS3.1 : HIGH
スコア	7.5
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
攻撃元区分(AV)	ネットワーク
攻撃条件の複雑さ(AC)	低
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)	なし
完全性への影響(I)	なし
可用性への影響(A)	高

CVSS2.0 : MEDIUM
Score	5.0
Vector	AV:N/AC:L/Au:N/C:N/I:N/A:P
攻撃元区分(AV)	ネットワーク
攻撃条件の複雑さ(AC)	低
攻撃前の認証要否(Au)	不要
機密性への影響(C)	なし
完全性への影響(I)	なし
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:nlnetlabs:unbound::::::::					1.10.1

Configuration2	or higher	or less	more than	less than
cpe:2.3:o:debian:debian_linux:9.0:::::::*
cpe:2.3:o:debian:debian_linux:10.0:::::::*

Configuration3	or higher	or less	more than	less than
cpe:2.3:o:opensuse:leap:15.1:::::::*
cpe:2.3:o:opensuse:leap:15.2:::::::*

Configuration4	or higher	or less	more than	less than
cpe:2.3:o:canonical:ubuntu_linux:18.04::::lts:::
cpe:2.3:o:canonical:ubuntu_linux:19.10:::::::*
cpe:2.3:o:canonical:ubuntu_linux:20.04::::lts:::

Configuration5	or higher	or less	more than	less than
cpe:2.3:o:fedoraproject:fedora:31:::::::*
cpe:2.3:o:fedoraproject:fedora:32:::::::*

Related information, measures and tools

No	URL	タグ
1	http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00067.html	Mailing List Third Party Advisory
2	http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00069.html	Mailing List Third Party Advisory
3	http://www.nxnsattack.com	Technical Description
4	http://www.openwall.com/lists/oss-security/2020/05/19/5	Mailing List Patch Third Party Advisory
5	https://lists.debian.org/debian-lts-announce/2021/02/msg00017.html	Mailing List Third Party Advisory
6	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F5NFROI2OMCZLYRTCNGHGO3TUD32LCIQ/
7	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YJ42N2HBZ3DXMSEC56SWIIOFQGOS5M7I/
8	https://nlnetlabs.nl/downloads/unbound/CVE-2020-12662_2020-12663.txt	Vendor Advisory
9	https://security.FreeBSD.org/advisories/FreeBSD-SA-20:19.unbound.asc	Third Party Advisory
10	https://security.netapp.com/advisory/ntap-20200702-0006/	Third Party Advisory
11	https://usn.ubuntu.com/4374-1/	Third Party Advisory
12	https://www.debian.org/security/2020/dsa-4694	Third Party Advisory
13	https://www.synology.com/security/advisory/Synology_SA_20_12	Third Party Advisory
14	http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00067.html	Mailing List Third Party Advisory
15	https://www.synology.com/security/advisory/Synology_SA_20_12	Third Party Advisory
16	https://www.debian.org/security/2020/dsa-4694	Third Party Advisory
17	https://usn.ubuntu.com/4374-1/	Third Party Advisory
18	https://security.netapp.com/advisory/ntap-20200702-0006/	Third Party Advisory
19	https://security.FreeBSD.org/advisories/FreeBSD-SA-20:19.unbound.asc	Third Party Advisory
20	https://nlnetlabs.nl/downloads/unbound/CVE-2020-12662_2020-12663.txt	Vendor Advisory
21	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YJ42N2HBZ3DXMSEC56SWIIOFQGOS5M7I/
22	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F5NFROI2OMCZLYRTCNGHGO3TUD32LCIQ/
23	https://lists.debian.org/debian-lts-announce/2021/02/msg00017.html	Mailing List Third Party Advisory
24	http://www.openwall.com/lists/oss-security/2020/05/19/5	Mailing List Patch Third Party Advisory
25	http://www.nxnsattack.com	Technical Description
26	http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00069.html	Mailing List Third Party Advisory

Common Vulnerabilities List

No	CWE	Name	URL
1	CWE-400	リソースの枯渇	https://cwe.mitre.org/data/definitions/400.html

JVN Vulnerability Information

Unbound における再帰制御に関する脆弱性

Title	Unbound における再帰制御に関する脆弱性
Summary	Unbound には、再帰制御に関する脆弱性が存在します。
Possible impacts	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	May 19, 2020, midnight
Registration Date	June 17, 2020, 3:49 p.m.
Last Update	June 17, 2020, 3:49 p.m.

Affected System

Stichting NLnet Labs

Unbound 1.10.1 未満

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-2020-12662	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-12662
National Vulnerability Database (NVD)
2	CVE-2020-12662	https://nvd.nist.gov/vuln/detail/CVE-2020-12662
Unbound
3	CVE-2020-12662	https://nlnetlabs.nl/downloads/unbound/CVE-2020-12662_2020-12663.txt

CWE (共通脆弱性タイプ一覧)

No	Name	URL
JVNDB
1	CWE-674	https://cwe.mitre.org/data/definitions/674.html

その他

No	Name	URL
関連文書
1	Unbound - CVE-2020-12662, CVE-2020-12662	https://www.openwall.com/lists/oss-security/2020/05/19/5

Change Log

No	Changed Details	Date of change
1	[2020年06月17日] 掲載	June 17, 2020, 3:49 p.m.