NVD Vulnerability Detail

CVE-2020-14001

Summary	The kramdown gem before 2.3.0 for Ruby processes the template option inside Kramdown documents by default, which allows unintended read access (such as template="/etc/passwd") or unintended embedded Ruby code execution (such as a string that begins with template="string://<%= `). NOTE: kramdown is used in Jekyll, GitLab Pages, GitHub Pages, and Thredded Forum.
Publication Date	July 18, 2020, 1:15 a.m.
Registration Date	Jan. 26, 2021, 11:52 a.m.
Last Update	Nov. 21, 2024, 2:02 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:kramdown_project:kramdown::::::ruby::*					2.3.0

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:fedoraproject:fedora:31:::::::*
cpe:2.3:o:fedoraproject:fedora:32:::::::*

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

Related information, measures and tools

No	URL	タグ
1	https://github.com/gettalong/kramdown	Third Party Advisory
2	https://github.com/gettalong/kramdown/commit/1b8fd33c3120bfc6e5164b449e2c2fc9c9306fde	Patch Third Party Advisory
3	https://github.com/gettalong/kramdown/compare/REL_2_2_1...REL_2_3_0	Patch Third Party Advisory
4	https://kramdown.gettalong.org	Vendor Advisory
5	https://kramdown.gettalong.org/news.html	Release Notes Vendor Advisory
6	https://lists.apache.org/thread.html/r96df7899fbb456fe2705882f710a0c8e8614b573fbffd8d12e3f54d2%40%3Cnotifications.fluo.apache.org%3E
7	https://lists.debian.org/debian-lts-announce/2020/08/msg00014.html	Mailing List Third Party Advisory
8	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ENMMGKHRQIZ3QKGOMBBBGB6B4LB5I7NQ/
9	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KBLTGBYU7NKOUOHDKVCU4GFZMGA6BP4L/
10	https://rubygems.org/gems/kramdown	Third Party Advisory
11	https://security.netapp.com/advisory/ntap-20200731-0004/	Third Party Advisory
12	https://usn.ubuntu.com/4562-1/	Third Party Advisory
13	https://www.debian.org/security/2020/dsa-4743	Third Party Advisory
14	https://github.com/gettalong/kramdown	Third Party Advisory
15	https://www.debian.org/security/2020/dsa-4743	Third Party Advisory
16	https://usn.ubuntu.com/4562-1/	Third Party Advisory
17	https://security.netapp.com/advisory/ntap-20200731-0004/	Third Party Advisory
18	https://rubygems.org/gems/kramdown	Third Party Advisory
19	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KBLTGBYU7NKOUOHDKVCU4GFZMGA6BP4L/
20	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ENMMGKHRQIZ3QKGOMBBBGB6B4LB5I7NQ/
21	https://lists.debian.org/debian-lts-announce/2020/08/msg00014.html	Mailing List Third Party Advisory
22	https://lists.apache.org/thread.html/r96df7899fbb456fe2705882f710a0c8e8614b573fbffd8d12e3f54d2%40%3Cnotifications.fluo.apache.org%3E
23	https://kramdown.gettalong.org/news.html	Release Notes Vendor Advisory
24	https://kramdown.gettalong.org	Vendor Advisory
25	https://github.com/gettalong/kramdown/compare/REL_2_2_1...REL_2_3_0	Patch Third Party Advisory
26	https://github.com/gettalong/kramdown/commit/1b8fd33c3120bfc6e5164b449e2c2fc9c9306fde	Patch Third Party Advisory

Common Vulnerabilities List

No	CWE	Name	URL
1	CWE-862	認証の欠如	https://cwe.mitre.org/data/definitions/862.html

JVN Vulnerability Information

Ruby 用 kramdown gem におけるインジェクションに関する脆弱性

Title	Ruby 用 kramdown gem におけるインジェクションに関する脆弱性
Summary	Ruby 用 kramdown gem 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	June 27, 2020, midnight
Registration Date	Sept. 8, 2020, 4:47 p.m.
Last Update	Sept. 8, 2020, 4:47 p.m.

Affected System

kramdown project

kramdown 2.3.0 未満

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-2020-14001	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-14001
National Vulnerability Database (NVD)
2	CVE-2020-14001	https://nvd.nist.gov/vuln/detail/CVE-2020-14001

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 Security Advisory
1	DSA-4743	https://www.debian.org/security/2020/dsa-4743
GitHub
2	Add option forbidden_inline_options	https://github.com/gettalong/kramdown/commit/1b8fd33c3120bfc6e5164b449e2c2fc9c9306fde
3	Comparing changes	https://github.com/gettalong/kramdown/compare/REL_2_2_1...REL_2_3_0
kramdown
4	kramdown	https://kramdown.gettalong.org/
5	News	https://kramdown.gettalong.org/news.html

Change Log

No	Changed Details	Date of change
1	[2020年09月08日] 掲載	Sept. 8, 2020, 4:47 p.m.