NVD Vulnerability Detail

CVE-2020-29570

Summary	An issue was discovered in Xen through 4.14.x. Recording of the per-vCPU control block mapping maintained by Xen and that of pointers into the control block is reversed. The consumer assumes, seeing the former initialized, that the latter are also ready for use. Malicious or buggy guest kernels can mount a Denial of Service (DoS) attack affecting the entire system.
Publication Date	Dec. 16, 2020, 2:15 a.m.
Registration Date	Jan. 26, 2021, 11:57 a.m.
Last Update	Nov. 21, 2024, 2:24 p.m.

Affected software configurations

Configuration1		or higher	or less	more than	less than
cpe:2.3:o:xen:xen::::::::		4.4.0	4.14.0

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

Related information, measures and tools

No	URL	タグ
1	http://www.openwall.com/lists/oss-security/2020/12/16/4	Mailing List Third Party Advisory
2	http://www.openwall.com/lists/oss-security/2020/12/16/4	Mailing List Third Party Advisory
3	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2C6M6S3CIMEBACH6O7V4H2VDANMO6TVA/
4	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2C6M6S3CIMEBACH6O7V4H2VDANMO6TVA/
5	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OBLV6L6Q24PPQ2CRFXDX4Q76KU776GKI/
6	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OBLV6L6Q24PPQ2CRFXDX4Q76KU776GKI/
7	https://security.gentoo.org/glsa/202107-30	Third Party Advisory
8	https://security.gentoo.org/glsa/202107-30	Third Party Advisory
9	https://www.debian.org/security/2020/dsa-4812	Third Party Advisory
10	https://www.debian.org/security/2020/dsa-4812	Third Party Advisory
11	https://xenbits.xenproject.org/xsa/advisory-358.html	Patch Vendor Advisory
12	https://xenbits.xenproject.org/xsa/advisory-358.html	Patch Vendor Advisory

Common Vulnerabilities List

No	CWE	Name	URL
1	CWE-770	制限またはスロットリング無しのリソースの割り当て	https://cwe.mitre.org/data/definitions/770.html

JVN Vulnerability Information

Xen における制限またはスロットリング無しのリソースの割り当てに関する脆弱性

Title	Xen における制限またはスロットリング無しのリソースの割り当てに関する脆弱性
Summary	Xen には、制限またはスロットリング無しのリソースの割り当て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	Dec. 15, 2020, midnight
Registration Date	Aug. 25, 2021, 12:06 p.m.
Last Update	Aug. 25, 2021, 12:06 p.m.

Affected System

Debian

Debian GNU/Linux

Fedora Project

Fedora

Xen プロジェクト

Xen 4.14.x まで

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-2020-29570	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-29570
National Vulnerability Database (NVD)
2	CVE-2020-29570	https://nvd.nist.gov/vuln/detail/CVE-2020-29570

CWE (共通脆弱性タイプ一覧)

No	Name	URL
JVNDB
1	CWE-770	https://cwe.mitre.org/data/definitions/770.html

ベンダー情報

No	Name	URL
Debian Security Advisory
1	DSA-4812-1	https://www.debian.org/security/2020/dsa-4812
Fedora Update Notification
2	FEDORA-2020-64859a826b	https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OBLV6L6Q24PPQ2CRFXDX4Q76KU776GKI/
3	FEDORA-2020-df772b417b	https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2C6M6S3CIMEBACH6O7V4H2VDANMO6TVA/
Xen Security Advisory
4	XSA-358	https://xenbits.xenproject.org/xsa/advisory-358.html

Change Log

No	Changed Details	Date of change
1	[2021年08月25日] 掲載	Aug. 25, 2021, 12:06 p.m.