NVD Vulnerability Detail

CVE-2015-7975

Summary	The nextvar function in NTP before 4.2.8p6 and 4.3.x before 4.3.90 does not properly validate the length of its input, which allows an attacker to cause a denial of service (application crash).
Publication Date	Jan. 31, 2017, 6:59 a.m.
Registration Date	Jan. 26, 2021, 2:57 p.m.
Last Update	Nov. 21, 2024, 11:37 a.m.

CVSS3.0 : MEDIUM
スコア	6.2
Vector	CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
攻撃元区分(AV)	ローカル
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 : LOW
Score	2.1
Vector	AV:L/AC:L/Au:N/C:N/I:N/A:P
攻撃元区分(AV)	ローカル
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:ntp:ntp:4.3.80:::::::*
cpe:2.3:a:ntp:ntp:4.3.51:::::::*
cpe:2.3:a:ntp:ntp:4.3.17:::::::*
cpe:2.3:a:ntp:ntp:4.3.30:::::::*
cpe:2.3:a:ntp:ntp:4.3.74:::::::*
cpe:2.3:a:ntp:ntp:4.3.67:::::::*
cpe:2.3:a:ntp:ntp:4.3.14:::::::*
cpe:2.3:a:ntp:ntp:4.3.27:::::::*
cpe:2.3:a:ntp:ntp:4.3.13:::::::*
cpe:2.3:a:ntp:ntp:4.3.36:::::::*
cpe:2.3:a:ntp:ntp:4.3.16:::::::*
cpe:2.3:a:ntp:ntp:4.3.35:::::::*
cpe:2.3:a:ntp:ntp:4.3.53:::::::*
cpe:2.3:a:ntp:ntp:4.3.64:::::::*
cpe:2.3:a:ntp:ntp:4.3.20:::::::*
cpe:2.3:a:ntp:ntp:4.3.40:::::::*
cpe:2.3:a:ntp:ntp:4.3.68:::::::*
cpe:2.3:a:ntp:ntp:4.3.46:::::::*
cpe:2.3:a:ntp:ntp:4.3.77:::::::*
cpe:2.3:a:ntp:ntp:4.3.1:::::::*
cpe:2.3:a:ntp:ntp:4.3.6:::::::*
cpe:2.3:a:ntp:ntp:4.3.2:::::::*
cpe:2.3:a:ntp:ntp:4.3.78:::::::*
cpe:2.3:a:ntp:ntp:4.3.79:::::::*
cpe:2.3:a:ntp:ntp:4.3.61:::::::*
cpe:2.3:a:ntp:ntp:4.3.42:::::::*
cpe:2.3:a:ntp:ntp:4.3.10:::::::*
cpe:2.3:a:ntp:ntp:4.3.88:::::::*
cpe:2.3:a:ntp:ntp:4.3.69:::::::*
cpe:2.3:a:ntp:ntp:4.3.65:::::::*
cpe:2.3:a:ntp:ntp:4.3.48:::::::*
cpe:2.3:a:ntp:ntp:4.3.71:::::::*
cpe:2.3:a:ntp:ntp:4.3.11:::::::*
cpe:2.3:a:ntp:ntp:4.3.34:::::::*
cpe:2.3:a:ntp:ntp:4.3.58:::::::*
cpe:2.3:a:ntp:ntp:4.3.31:::::::*
cpe:2.3:a:ntp:ntp:4.3.86:::::::*
cpe:2.3:a:ntp:ntp:4.3.85:::::::*
cpe:2.3:a:ntp:ntp:4.3.57:::::::*
cpe:2.3:a:ntp:ntp:4.3.83:::::::*
cpe:2.3:a:ntp:ntp:4.3.22:::::::*
cpe:2.3:a:ntp:ntp:4.3.56:::::::*
cpe:2.3:a:ntp:ntp:4.3.25:::::::*
cpe:2.3:a:ntp:ntp:4.3.70:::::::*
cpe:2.3:a:ntp:ntp:4.3.59:::::::*
cpe:2.3:a:ntp:ntp:4.3.21:::::::*
cpe:2.3:a:ntp:ntp:4.3.39:::::::*
cpe:2.3:a:ntp:ntp:4.3.4:::::::*
cpe:2.3:a:ntp:ntp:4.3.49:::::::*
cpe:2.3:a:ntp:ntp:4.3.50:::::::*
cpe:2.3:a:ntp:ntp:4.3.60:::::::*
cpe:2.3:a:ntp:ntp:4.3.54:::::::*
cpe:2.3:a:ntp:ntp:4.3.15:::::::*
cpe:2.3:a:ntp:ntp:4.3.12:::::::*
cpe:2.3:a:ntp:ntp:4.3.43:::::::*
cpe:2.3:a:ntp:ntp:4.3.45:::::::*
cpe:2.3:a:ntp:ntp:4.3.66:::::::*
cpe:2.3:a:ntp:ntp:4.3.0:::::::*
cpe:2.3:a:ntp:ntp:4.3.3:::::::*
cpe:2.3:a:ntp:ntp:4.3.81:::::::*
cpe:2.3:a:ntp:ntp:4.3.84:::::::*
cpe:2.3:a:ntp:ntp:4.3.24:::::::*
cpe:2.3:a:ntp:ntp:4.3.28:::::::*
cpe:2.3:a:ntp:ntp:4.3.18:::::::*
cpe:2.3:a:ntp:ntp:4.3.76:::::::*
cpe:2.3:a:ntp:ntp:4.3.33:::::::*
cpe:2.3:a:ntp:ntp:4.3.7:::::::*
cpe:2.3:a:ntp:ntp:4.3.38:::::::*
cpe:2.3:a:ntp:ntp:4.3.72:::::::*
cpe:2.3:a:ntp:ntp:4.3.87:::::::*
cpe:2.3:a:ntp:ntp:4.3.29:::::::*
cpe:2.3:a:ntp:ntp:4.3.23:::::::*
cpe:2.3:a:ntp:ntp:4.3.63:::::::*
cpe:2.3:a:ntp:ntp:4.3.52:::::::*
cpe:2.3:a:ntp:ntp:4.3.41:::::::*
cpe:2.3:a:ntp:ntp:4.3.47:::::::*
cpe:2.3:a:ntp:ntp:4.3.37:::::::*
cpe:2.3:a:ntp:ntp:4.3.73:::::::*
cpe:2.3:a:ntp:ntp:4.3.5:::::::*
cpe:2.3:a:ntp:ntp:4.3.82:::::::*
cpe:2.3:a:ntp:ntp:4.3.75:::::::*
cpe:2.3:a:ntp:ntp::p5::::::*		4.2.8
cpe:2.3:a:ntp:ntp:4.3.32:::::::*
cpe:2.3:a:ntp:ntp:4.3.19:::::::*
cpe:2.3:a:ntp:ntp:4.3.44:::::::*
cpe:2.3:a:ntp:ntp:4.3.55:::::::*
cpe:2.3:a:ntp:ntp:4.3.26:::::::*
cpe:2.3:a:ntp:ntp:4.3.62:::::::*
cpe:2.3:a:ntp:ntp:4.3.8:::::::*
cpe:2.3:a:ntp:ntp:4.3.89:::::::*

Related information, measures and tools

No	URL	タグ
1	http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00059.html	Third Party Advisory
2	http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00059.html	Third Party Advisory
3	http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00060.html	Third Party Advisory
4	http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00060.html	Third Party Advisory
5	http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00020.html	Third Party Advisory
6	http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00020.html	Third Party Advisory
7	http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00038.html	Third Party Advisory
8	http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00038.html	Third Party Advisory
9	http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00048.html	Third Party Advisory
10	http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00048.html	Third Party Advisory
11	http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html	Third Party Advisory
12	http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html	Third Party Advisory
13	http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html	Third Party Advisory
14	http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html	Third Party Advisory
15	http://lists.opensuse.org/opensuse-updates/2016-05/msg00114.html	Third Party Advisory
16	http://lists.opensuse.org/opensuse-updates/2016-05/msg00114.html	Third Party Advisory
17	http://support.ntp.org/bin/view/Main/NtpBug2937	Vendor Advisory
18	http://support.ntp.org/bin/view/Main/NtpBug2937	Vendor Advisory
19	http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160127-ntpd	Third Party Advisory
20	http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160127-ntpd	Third Party Advisory
21	http://www.securityfocus.com/bid/81959	Third Party Advisory VDB Entry
22	http://www.securityfocus.com/bid/81959	Third Party Advisory VDB Entry
23	http://www.securitytracker.com/id/1034782	Third Party Advisory VDB Entry
24	http://www.securitytracker.com/id/1034782	Third Party Advisory VDB Entry
25	http://www.ubuntu.com/usn/USN-3096-1	Third Party Advisory
26	http://www.ubuntu.com/usn/USN-3096-1	Third Party Advisory
27	https://bto.bluecoat.com/security-advisory/sa113	Third Party Advisory
28	https://bto.bluecoat.com/security-advisory/sa113	Third Party Advisory
29	https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03750en_us
30	https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03750en_us
31	https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03766en_us
32	https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03766en_us
33	https://security.FreeBSD.org/advisories/FreeBSD-SA-16:09.ntp.asc
34	https://security.FreeBSD.org/advisories/FreeBSD-SA-16:09.ntp.asc
35	https://security.gentoo.org/glsa/201607-15	Third Party Advisory
36	https://security.gentoo.org/glsa/201607-15	Third Party Advisory
37	https://security.netapp.com/advisory/ntap-20171031-0001/
38	https://security.netapp.com/advisory/ntap-20171031-0001/
39	https://www.kb.cert.org/vuls/id/718152	Third Party Advisory US Government Resource
40	https://www.kb.cert.org/vuls/id/718152	Third Party Advisory US Government Resource

Common Vulnerabilities List

No	CWE	Name	URL
1	CWE-119	バッファエラー	https://cwe.mitre.org/data/definitions/118.html

JVN Vulnerability Information

NTP の nextvar 関数におけるサービス運用妨害 (DoS) の脆弱性

Title	NTP の nextvar 関数におけるサービス運用妨害 (DoS) の脆弱性
Summary	NTP の nextvar 関数は、入力の長さを適切に検証しないため、サービス運用妨害 (アプリケーションクラッシュ) 状態にされる脆弱性が存在します。
Possible impacts	攻撃者により、サービス運用妨害 (アプリケーションクラッシュ) 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. 16, 2015, midnight
Registration Date	Feb. 14, 2017, 7:49 p.m.
Last Update	Feb. 14, 2017, 7:49 p.m.

Affected System

NTP Project

NTP 4.2.8p6 未満

NTP 4.3.90 未満の 4.3.x

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-2015-7975	http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-7975
National Vulnerability Database (NVD)
2	CVE-2015-7975	http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-7975

CWE (共通脆弱性タイプ一覧)

No	Name	URL
JVNDB
1	CWE-119	https://jvndb.jvn.jp/ja/cwe/CWE-119.html
2	CWE-20	https://jvndb.jvn.jp/ja/cwe/CWE-20.html

ベンダー情報

No	Name	URL
Cisco Security Advisory
1	cisco-sa-20160127-ntpd	https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160127-ntpd
ntp.org
2	NTP Bug 2937	http://support.ntp.org/bin/view/Main/NtpBug2937
Security Advisories
3	SA113	https://bto.bluecoat.com/security-advisory/sa113
Security Notice
4	January 2016 NTP-4.2.8p6 Security Vulnerability Announcement (Medium)	http://support.ntp.org/bin/view/Main/SecurityNotice#January_2016_NTP_4_2_8p6_Securit

その他

No	Name	URL
JVN
1	JVNVU#91176422	https://jvn.jp/vu/JVNVU91176422/
US-CERT Vulnerability Note
2	VU#718152	https://www.kb.cert.org/vuls/id/718152

Change Log

No	Changed Details	Date of change
0	[2017年02月14日] 掲載	Feb. 17, 2018, 10:37 a.m.

Configuration1	or higher	or less	more than	less than
cpe:2.3:a:ntp:ntp:4.3.80:::::::*
cpe:2.3:a:ntp:ntp:4.3.51:::::::*
cpe:2.3:a:ntp:ntp:4.3.17:::::::*
cpe:2.3:a:ntp:ntp:4.3.30:::::::*
cpe:2.3:a:ntp:ntp:4.3.74:::::::*
cpe:2.3:a:ntp:ntp:4.3.67:::::::*
cpe:2.3:a:ntp:ntp:4.3.14:::::::*
cpe:2.3:a:ntp:ntp:4.3.27:::::::*
cpe:2.3:a:ntp:ntp:4.3.13:::::::*
cpe:2.3:a:ntp:ntp:4.3.36:::::::*
cpe:2.3:a:ntp:ntp:4.3.16:::::::*
cpe:2.3:a:ntp:ntp:4.3.35:::::::*
cpe:2.3:a:ntp:ntp:4.3.53:::::::*
cpe:2.3:a:ntp:ntp:4.3.64:::::::*
cpe:2.3:a:ntp:ntp:4.3.20:::::::*
cpe:2.3:a:ntp:ntp:4.3.40:::::::*
cpe:2.3:a:ntp:ntp:4.3.68:::::::*
cpe:2.3:a:ntp:ntp:4.3.46:::::::*
cpe:2.3:a:ntp:ntp:4.3.77:::::::*
cpe:2.3:a:ntp:ntp:4.3.1:::::::*
cpe:2.3:a:ntp:ntp:4.3.6:::::::*
cpe:2.3:a:ntp:ntp:4.3.2:::::::*
cpe:2.3:a:ntp:ntp:4.3.78:::::::*
cpe:2.3:a:ntp:ntp:4.3.79:::::::*
cpe:2.3:a:ntp:ntp:4.3.61:::::::*
cpe:2.3:a:ntp:ntp:4.3.42:::::::*
cpe:2.3:a:ntp:ntp:4.3.10:::::::*
cpe:2.3:a:ntp:ntp:4.3.88:::::::*
cpe:2.3:a:ntp:ntp:4.3.69:::::::*
cpe:2.3:a:ntp:ntp:4.3.65:::::::*
cpe:2.3:a:ntp:ntp:4.3.48:::::::*
cpe:2.3:a:ntp:ntp:4.3.71:::::::*
cpe:2.3:a:ntp:ntp:4.3.11:::::::*
cpe:2.3:a:ntp:ntp:4.3.34:::::::*
cpe:2.3:a:ntp:ntp:4.3.58:::::::*
cpe:2.3:a:ntp:ntp:4.3.31:::::::*
cpe:2.3:a:ntp:ntp:4.3.86:::::::*
cpe:2.3:a:ntp:ntp:4.3.85:::::::*
cpe:2.3:a:ntp:ntp:4.3.57:::::::*
cpe:2.3:a:ntp:ntp:4.3.83:::::::*
cpe:2.3:a:ntp:ntp:4.3.22:::::::*
cpe:2.3:a:ntp:ntp:4.3.56:::::::*
cpe:2.3:a:ntp:ntp:4.3.25:::::::*
cpe:2.3:a:ntp:ntp:4.3.70:::::::*
cpe:2.3:a:ntp:ntp:4.3.59:::::::*
cpe:2.3:a:ntp:ntp:4.3.21:::::::*
cpe:2.3:a:ntp:ntp:4.3.39:::::::*
cpe:2.3:a:ntp:ntp:4.3.4:::::::*
cpe:2.3:a:ntp:ntp:4.3.49:::::::*
cpe:2.3:a:ntp:ntp:4.3.50:::::::*
cpe:2.3:a:ntp:ntp:4.3.60:::::::*
cpe:2.3:a:ntp:ntp:4.3.54:::::::*
cpe:2.3:a:ntp:ntp:4.3.15:::::::*
cpe:2.3:a:ntp:ntp:4.3.12:::::::*
cpe:2.3:a:ntp:ntp:4.3.43:::::::*
cpe:2.3:a:ntp:ntp:4.3.45:::::::*
cpe:2.3:a:ntp:ntp:4.3.66:::::::*
cpe:2.3:a:ntp:ntp:4.3.0:::::::*
cpe:2.3:a:ntp:ntp:4.3.3:::::::*
cpe:2.3:a:ntp:ntp:4.3.81:::::::*
cpe:2.3:a:ntp:ntp:4.3.84:::::::*
cpe:2.3:a:ntp:ntp:4.3.24:::::::*
cpe:2.3:a:ntp:ntp:4.3.28:::::::*
cpe:2.3:a:ntp:ntp:4.3.18:::::::*
cpe:2.3:a:ntp:ntp:4.3.76:::::::*
cpe:2.3:a:ntp:ntp:4.3.33:::::::*
cpe:2.3:a:ntp:ntp:4.3.7:::::::*
cpe:2.3:a:ntp:ntp:4.3.38:::::::*
cpe:2.3:a:ntp:ntp:4.3.72:::::::*
cpe:2.3:a:ntp:ntp:4.3.87:::::::*
cpe:2.3:a:ntp:ntp:4.3.29:::::::*
cpe:2.3:a:ntp:ntp:4.3.23:::::::*
cpe:2.3:a:ntp:ntp:4.3.63:::::::*
cpe:2.3:a:ntp:ntp:4.3.52:::::::*
cpe:2.3:a:ntp:ntp:4.3.41:::::::*
cpe:2.3:a:ntp:ntp:4.3.47:::::::*
cpe:2.3:a:ntp:ntp:4.3.37:::::::*
cpe:2.3:a:ntp:ntp:4.3.73:::::::*
cpe:2.3:a:ntp:ntp:4.3.5:::::::*
cpe:2.3:a:ntp:ntp:4.3.82:::::::*
cpe:2.3:a:ntp:ntp:4.3.75:::::::*
cpe:2.3:a:ntp:ntp::p5::::::*		4.2.8
cpe:2.3:a:ntp:ntp:4.3.32:::::::*
cpe:2.3:a:ntp:ntp:4.3.19:::::::*
cpe:2.3:a:ntp:ntp:4.3.44:::::::*
cpe:2.3:a:ntp:ntp:4.3.55:::::::*
cpe:2.3:a:ntp:ntp:4.3.26:::::::*
cpe:2.3:a:ntp:ntp:4.3.62:::::::*
cpe:2.3:a:ntp:ntp:4.3.8:::::::*
cpe:2.3:a:ntp:ntp:4.3.89:::::::*