NVD Vulnerability Detail

CVE-2020-8165

Summary	A deserialization of untrusted data vulnernerability exists in rails < 5.2.4.3, rails < 6.0.3.1 that can allow an attacker to unmarshal user-provided objects in MemCacheStore and RedisCacheStore potentially resulting in an RCE.
Publication Date	June 20, 2020, 3:15 a.m.
Registration Date	Jan. 26, 2021, 12:01 p.m.
Last Update	Nov. 21, 2024, 2:38 p.m.

CVSS3.1 : CRITICAL
スコア	9.8
Vector	CVSS:3.1/AV:N/AC:L/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)	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)	高
完全性への影響(I)	高
可用性への影響(A)	高

CVSS2.0 : HIGH
Score	7.5
Vector	AV:N/AC:L/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)	低
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:rubyonrails:rails::::::::	6.0.0			6.0.3.1
cpe:2.3:a:rubyonrails:rails::::::::				5.2.4.3

Configuration2	or higher	or less	more than	less than
cpe:2.3:o:debian:debian_linux:8.0:::::::*
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:::::::*

Related information, measures and tools

No	URL	タグ
1	http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00031.html	Mailing List Third Party Advisory
2	http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00031.html	Mailing List Third Party Advisory
3	http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00034.html	Mailing List Third Party Advisory
4	http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00034.html	Mailing List Third Party Advisory
5	https://groups.google.com/g/rubyonrails-security/c/bv6fW4S0Y1c	Mailing List Patch Third Party Advisory
6	https://groups.google.com/g/rubyonrails-security/c/bv6fW4S0Y1c	Mailing List Patch Third Party Advisory
7	https://hackerone.com/reports/413388	Exploit Patch Third Party Advisory
8	https://hackerone.com/reports/413388	Exploit Patch Third Party Advisory
9	https://lists.debian.org/debian-lts-announce/2020/06/msg00022.html	Mailing List Third Party Advisory
10	https://lists.debian.org/debian-lts-announce/2020/06/msg00022.html	Mailing List Third Party Advisory
11	https://lists.debian.org/debian-lts-announce/2020/07/msg00013.html	Mailing List Third Party Advisory
12	https://lists.debian.org/debian-lts-announce/2020/07/msg00013.html	Mailing List Third Party Advisory
13	https://weblog.rubyonrails.org/2020/5/18/Rails-5-2-4-3-and-6-0-3-1-have-been-released/	Vendor Advisory
14	https://weblog.rubyonrails.org/2020/5/18/Rails-5-2-4-3-and-6-0-3-1-have-been-released/	Vendor Advisory
15	https://www.debian.org/security/2020/dsa-4766	Third Party Advisory
16	https://www.debian.org/security/2020/dsa-4766	Third Party Advisory

Common Vulnerabilities List

No	CWE	Name	URL
1	CWE-502	信頼性のないデータのデシリアライゼーション	https://cwe.mitre.org/data/definitions/502.html

JVN Vulnerability Information

rails における信頼性のないデータのデシリアライゼーションに関する脆弱性

Title	rails における信頼性のないデータのデシリアライゼーションに関する脆弱性
Summary	rails における信頼性のないデータのデシリアライゼーションに関する脆弱性
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	May 18, 2020, midnight
Registration Date	July 27, 2020, 3:11 p.m.
Last Update	July 27, 2020, 3:11 p.m.

Affected System

Debian

Debian GNU/Linux

Ruby on Rails project

Rails 5.2.4.3 未満

Rails 6.0.3.1 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-2020-8165	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-8165
National Vulnerability Database (NVD)
2	CVE-2020-8165	https://nvd.nist.gov/vuln/detail/CVE-2020-8165

CWE (共通脆弱性タイプ一覧)

No	Name	URL
JVNDB
1	CWE-502	https://cwe.mitre.org/data/definitions/502.html

ベンダー情報

No	Name	URL
Debian
1	[SECURITY] [DLA 2251-1] rails security update	https://lists.debian.org/debian-lts-announce/2020/06/msg00022.html
2	[SECURITY] [DLA 2282-1] rails security update	https://lists.debian.org/debian-lts-announce/2020/07/msg00013.html
Rails weblog
3	Rails 5.2.4.3 and 6.0.3.1 have been released	https://weblog.rubyonrails.org/2020/5/18/Rails-5-2-4-3-and-6-0-3-1-have-been-released/

その他

No	Name	URL
関連文書
1	413388 (Untrusted strings that are cache fetched with raw option are automatically marshal loaded)	https://hackerone.com/reports/413388

Change Log

No	Changed Details	Date of change
1	[2020年07月27日] 掲載	July 27, 2020, 3:11 p.m.