NVD Vulnerability Detail

CVE-2019-16255

Summary	Ruby through 2.4.7, 2.5.x through 2.5.6, and 2.6.x through 2.6.4 allows code injection if the first argument (aka the "command" argument) to Shell#[] or Shell#test in lib/shell.rb is untrusted data. An attacker can exploit this to call an arbitrary Ruby method.
Publication Date	Nov. 27, 2019, 3:15 a.m.
Registration Date	Jan. 26, 2021, 11:39 a.m.
Last Update	Nov. 21, 2024, 1:30 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:ruby-lang:ruby::::::::	2.6.0	2.6.4
cpe:2.3:a:ruby-lang:ruby::::::::	2.5.0	2.5.6
cpe:2.3:a:ruby-lang:ruby::::::::	2.4.0	2.4.7

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:::::::*

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

Configuration4		or higher	or less	more than	less than
cpe:2.3:a:oracle:graalvm:19.3.0.2::::enterprise:::

Related information, measures and tools

No	URL	タグ
1	http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00041.html	Third Party Advisory
2	http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00041.html	Third Party Advisory
3	https://hackerone.com/reports/327512	Exploit Patch Third Party Advisory
4	https://hackerone.com/reports/327512	Exploit Patch Third Party Advisory
5	https://lists.debian.org/debian-lts-announce/2019/11/msg00025.html	Mailing List Third Party Advisory
6	https://lists.debian.org/debian-lts-announce/2019/11/msg00025.html	Mailing List Third Party Advisory
7	https://lists.debian.org/debian-lts-announce/2019/12/msg00009.html	Mailing List Third Party Advisory
8	https://lists.debian.org/debian-lts-announce/2019/12/msg00009.html	Mailing List Third Party Advisory
9	https://lists.debian.org/debian-lts-announce/2020/08/msg00027.html	Mailing List Third Party Advisory
10	https://lists.debian.org/debian-lts-announce/2020/08/msg00027.html	Mailing List Third Party Advisory
11	https://lists.debian.org/debian-lts-announce/2023/04/msg00033.html
12	https://lists.debian.org/debian-lts-announce/2023/04/msg00033.html
13	https://seclists.org/bugtraq/2019/Dec/31	Broken Link Mailing List Third Party Advisory
14	https://seclists.org/bugtraq/2019/Dec/31	Broken Link Mailing List Third Party Advisory
15	https://seclists.org/bugtraq/2019/Dec/32	Broken Link Mailing List Third Party Advisory
16	https://seclists.org/bugtraq/2019/Dec/32	Broken Link Mailing List Third Party Advisory
17	https://security.gentoo.org/glsa/202003-06	Third Party Advisory
18	https://security.gentoo.org/glsa/202003-06	Third Party Advisory
19	https://www.debian.org/security/2019/dsa-4587	Third Party Advisory
20	https://www.debian.org/security/2019/dsa-4587	Third Party Advisory
21	https://www.oracle.com/security-alerts/cpujan2020.html	Patch Third Party Advisory
22	https://www.oracle.com/security-alerts/cpujan2020.html	Patch Third Party Advisory
23	https://www.ruby-lang.org/ja/news/2019/10/01/code-injection-shell-test-cve-2019-16255/	Vendor Advisory
24	https://www.ruby-lang.org/ja/news/2019/10/01/code-injection-shell-test-cve-2019-16255/	Vendor Advisory
25	https://www.ruby-lang.org/ja/news/2019/10/01/ruby-2-4-8-released/	Release Notes
26	https://www.ruby-lang.org/ja/news/2019/10/01/ruby-2-4-8-released/	Release Notes
27	https://www.ruby-lang.org/ja/news/2019/10/01/ruby-2-5-7-released/	Release Notes
28	https://www.ruby-lang.org/ja/news/2019/10/01/ruby-2-5-7-released/	Release Notes
29	https://www.ruby-lang.org/ja/news/2019/10/01/ruby-2-6-5-released/	Release Notes
30	https://www.ruby-lang.org/ja/news/2019/10/01/ruby-2-6-5-released/	Release Notes

Common Vulnerabilities List

No	CWE	Name	URL
1	CWE-94	コード・インジェクション	https://cwe.mitre.org/data/definitions/94.html

JVN Vulnerability Information

Ruby におけるインジェクションに関する脆弱性

Title	Ruby におけるインジェクションに関する脆弱性
Summary	Ruby には、インジェクション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	Oct. 1, 2019, midnight
Registration Date	Dec. 11, 2019, 10:16 a.m.
Last Update	Dec. 11, 2019, 10:16 a.m.

Affected System

Ruby-lang.org

Ruby 2.4.7 まで

Ruby 2.5.6 までの 2.5.x

Ruby 2.6.4 までの 2.6.x

Debian

Debian GNU/Linux

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-2019-16255	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-16255
National Vulnerability Database (NVD)
2	CVE-2019-16255	https://nvd.nist.gov/vuln/detail/CVE-2019-16255
Ruby
3	CVE-2019-16255: Shell#[]およびShell#testのコード挿入脆弱性	https://www.ruby-lang.org/ja/news/2019/10/01/code-injection-shell-test-cve-2019-16255/

CWE (共通脆弱性タイプ一覧)

No	Name	URL
JVNDB
1	CWE-74	https://cwe.mitre.org/data/definitions/74.html

ベンダー情報

No	Name	URL
Debian
1	[SECURITY] [DLA 2007-1] ruby2.1 security update	https://lists.debian.org/debian-lts-announce/2019/11/msg00025.html
2	[SECURITY] [DLA 2027-1] jruby security update	https://lists.debian.org/debian-lts-announce/2019/12/msg00009.html
Ruby
3	Ruby 2.4.8 リリース	https://www.ruby-lang.org/ja/news/2019/10/01/ruby-2-4-8-released/
4	Ruby 2.5.7 リリース	https://www.ruby-lang.org/ja/news/2019/10/01/ruby-2-5-7-released/
5	Ruby 2.6.5 リリース	https://www.ruby-lang.org/ja/news/2019/10/01/ruby-2-6-5-released/

その他

No	Name	URL
関連文書
1	327512 (Potential command injection in `Shell#[]` and `Shell#test`)	https://hackerone.com/reports/327512

Change Log

No	Changed Details	Date of change
1	[2019年12月11日] 掲載	Dec. 11, 2019, 10:16 a.m.