NVD Vulnerability Detail

CVE-2017-9233

Summary	XML External Entity vulnerability in libexpat 2.2.0 and earlier (Expat XML Parser Library) allows attackers to put the parser in an infinite loop using a malformed external entity definition from an external DTD.
Publication Date	July 26, 2017, 5:29 a.m.
Registration Date	Jan. 26, 2021, 1:31 p.m.
Last Update	Nov. 21, 2024, 12:35 p.m.

CVSS3.1 : HIGH
スコア	7.5
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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)	なし
完全性への影響(I)	なし
可用性への影響(A)	高

CVSS2.0 : MEDIUM
Score	5.0
Vector	AV:N/AC:L/Au:N/C:N/I:N/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)	なし
完全性への影響(I)	なし
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:libexpat_project:libexpat::::::::			2.2.0

Configuration2	or higher	or less	more than	less than
cpe:2.3:a:python:python::::::::	3.6.0			3.6.2
cpe:2.3:a:python:python::::::::	3.5.0			3.5.4
cpe:2.3:a:python:python::::::::	3.4.0			3.4.7
cpe:2.3:a:python:python::::::::	3.3.0			3.3.7
cpe:2.3:a:python:python::::::::	2.7.0			2.7.15

Configuration3	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:::::::*

Related information, measures and tools

No	URL	タグ
1	http://www.debian.org/security/2017/dsa-3898	Third Party Advisory
2	http://www.debian.org/security/2017/dsa-3898	Third Party Advisory
3	http://www.openwall.com/lists/oss-security/2017/06/17/7	Mailing List VDB Entry
4	http://www.openwall.com/lists/oss-security/2017/06/17/7	Mailing List VDB Entry
5	http://www.securityfocus.com/bid/99276	Third Party Advisory VDB Entry
6	http://www.securityfocus.com/bid/99276	Third Party Advisory VDB Entry
7	http://www.securitytracker.com/id/1039427	Third Party Advisory VDB Entry
8	http://www.securitytracker.com/id/1039427	Third Party Advisory VDB Entry
9	https://github.com/libexpat/libexpat/blob/master/expat/Changes	Release Notes Third Party Advisory
10	https://github.com/libexpat/libexpat/blob/master/expat/Changes	Release Notes Third Party Advisory
11	https://libexpat.github.io/doc/cve-2017-9233/	Exploit Technical Description Vendor Advisory
12	https://libexpat.github.io/doc/cve-2017-9233/	Exploit Technical Description Vendor Advisory
13	https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
14	https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
15	https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
16	https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
17	https://support.apple.com/HT208112	Third Party Advisory
18	https://support.apple.com/HT208112	Third Party Advisory
19	https://support.apple.com/HT208113	Third Party Advisory
20	https://support.apple.com/HT208113	Third Party Advisory
21	https://support.apple.com/HT208115	Third Party Advisory
22	https://support.apple.com/HT208115	Third Party Advisory
23	https://support.apple.com/HT208144	Third Party Advisory
24	https://support.apple.com/HT208144	Third Party Advisory
25	https://support.f5.com/csp/article/K03244804	Third Party Advisory
26	https://support.f5.com/csp/article/K03244804	Third Party Advisory

Common Vulnerabilities List

No	CWE	Name	URL
1	CWE-611	XML 外部エンティティ参照の不適切な制限	https://cwe.mitre.org/data/definitions/611.html
2	CWE-835	無限ループ	https://cwe.mitre.org/data/definitions/835.html

JVN Vulnerability Information

libexpat における XML 外部エンティティの脆弱性

Title	libexpat における XML 外部エンティティの脆弱性
Summary	libexpat (Expat XML Parser Library) には、XML 外部エンティティの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	Aug. 24, 2017, midnight
Registration Date	Aug. 25, 2017, 4:57 p.m.
Last Update	Aug. 25, 2017, 4:57 p.m.

Affected System

Expat

Expat 2.2.0 およびそれ以前

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-2017-9233	http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-9233
National Vulnerability Database (NVD)
2	CVE-2017-9233	https://nvd.nist.gov/vuln/detail/CVE-2017-9233

CWE (共通脆弱性タイプ一覧)

No	Name	URL
JVNDB
1	CWE-611	https://cwe.mitre.org/data/definitions/611.html

ベンダー情報

No	Name	URL
Expat
1	External Entity Vulnerability in Expat 2.2.0 And Earlier	https://libexpat.github.io/doc/cve-2017-9233/
GitHub
2	libexpat/expat/Changes	https://github.com/libexpat/libexpat/blob/master/expat/Changes

Change Log

No	Changed Details	Date of change
0	[2017年08月25日] 掲載	Feb. 17, 2018, 10:37 a.m.