NVD Vulnerability Detail

CVE-2019-16254

Summary	Ruby through 2.4.7, 2.5.x through 2.5.6, and 2.6.x through 2.6.4 allows HTTP Response Splitting. If a program using WEBrick inserts untrusted input into the response header, an attacker can exploit it to insert a newline character to split a header, and inject malicious content to deceive clients. NOTE: this issue exists because of an incomplete fix for CVE-2017-17742, which addressed the CRLF vector, but did not address an isolated CR or an isolated LF.
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 : MEDIUM
スコア	5.3
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
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)	低
可用性への影響(A)	なし

CVSS2.0 : MEDIUM
Score	5.0
Vector	AV:N/AC:L/Au:N/C:N/I:P/A:N
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)	低
可用性への影響(A)	なし
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
cpe:2.3:a:ruby-lang:ruby::::::::		2.3.0

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

Related information, measures and tools

No	URL	タグ
1	http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00041.html
2	http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00041.html
3	https://hackerone.com/reports/331984	Third Party Advisory
4	https://hackerone.com/reports/331984	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
8	https://lists.debian.org/debian-lts-announce/2019/12/msg00009.html
9	https://lists.debian.org/debian-lts-announce/2020/08/msg00027.html
10	https://lists.debian.org/debian-lts-announce/2020/08/msg00027.html
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
14	https://seclists.org/bugtraq/2019/Dec/31
15	https://seclists.org/bugtraq/2019/Dec/32
16	https://seclists.org/bugtraq/2019/Dec/32
17	https://security.gentoo.org/glsa/202003-06
18	https://security.gentoo.org/glsa/202003-06
19	https://www.debian.org/security/2019/dsa-4586
20	https://www.debian.org/security/2019/dsa-4586
21	https://www.debian.org/security/2019/dsa-4587
22	https://www.debian.org/security/2019/dsa-4587
23	https://www.oracle.com/security-alerts/cpujan2020.html
24	https://www.oracle.com/security-alerts/cpujan2020.html
25	https://www.ruby-lang.org/ja/news/2019/10/01/http-response-splitting-in-webrick-cve-2019-16254/	Vendor Advisory
26	https://www.ruby-lang.org/ja/news/2019/10/01/http-response-splitting-in-webrick-cve-2019-16254/	Vendor Advisory
27	https://www.ruby-lang.org/ja/news/2019/10/01/ruby-2-4-8-released/	Vendor Advisory
28	https://www.ruby-lang.org/ja/news/2019/10/01/ruby-2-4-8-released/	Vendor Advisory
29	https://www.ruby-lang.org/ja/news/2019/10/01/ruby-2-5-7-released/	Vendor Advisory
30	https://www.ruby-lang.org/ja/news/2019/10/01/ruby-2-5-7-released/	Vendor Advisory
31	https://www.ruby-lang.org/ja/news/2019/10/01/ruby-2-6-5-released/	Vendor Advisory
32	https://www.ruby-lang.org/ja/news/2019/10/01/ruby-2-6-5-released/	Vendor Advisory

Common Vulnerabilities List

No	CWE	Name	URL
1	CWE-74	インジェクション	https://cwe.mitre.org/data/definitions/74.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	情報を改ざん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, 10:20 a.m.
Last Update	Dec. 11, 2019, 10:20 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-2019-16254	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-16254
National Vulnerability Database (NVD)
2	CVE-2019-16254	https://nvd.nist.gov/vuln/detail/CVE-2019-16254
Ruby News
3	CVE-2019-16254: WEBrick における HTTP レスポンス偽装の脆弱性について（追加の修正）	https://www.ruby-lang.org/ja/news/2019/10/01/http-response-splitting-in-webrick-cve-2019-16254/

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/

Change Log

No	Changed Details	Date of change
1	[2019年12月11日] 掲載	Dec. 11, 2019, 10:20 a.m.