NVD Vulnerability Detail

CVE-2007-2243

Summary	OpenSSH 4.6 and earlier, when ChallengeResponseAuthentication is enabled, allows remote attackers to determine the existence of user accounts by attempting to authenticate via S/KEY, which displays a different response if the user account exists, a similar issue to CVE-2001-1483.
Publication Date	April 26, 2007, 1:19 a.m.
Registration Date	Jan. 29, 2021, 2:11 p.m.
Last Update	July 29, 2017, 10:31 a.m.

CVSS2.0 : MEDIUM
Score	5.0
Vector	AV:N/AC:L/Au:N/C:P/I:N/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)	低
完全性への影響(I)	なし
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:openbsd:openssh:1.2:::::::*
cpe:2.3:a:openbsd:openssh:1.2.1:::::::*
cpe:2.3:a:openbsd:openssh:1.2.2:::::::*
cpe:2.3:a:openbsd:openssh:1.2.3:::::::*
cpe:2.3:a:openbsd:openssh:1.2.27:::::::*
cpe:2.3:a:openbsd:openssh:2.1:::::::*
cpe:2.3:a:openbsd:openssh:2.1.1:::::::*
cpe:2.3:a:openbsd:openssh:2.2:::::::*
cpe:2.3:a:openbsd:openssh:2.3:::::::*
cpe:2.3:a:openbsd:openssh:2.5:::::::*
cpe:2.3:a:openbsd:openssh:2.5.1:::::::*
cpe:2.3:a:openbsd:openssh:2.5.2:::::::*
cpe:2.3:a:openbsd:openssh:2.9:::::::*
cpe:2.3:a:openbsd:openssh:2.9.9:::::::*
cpe:2.3:a:openbsd:openssh:2.9.9p2:::::::*
cpe:2.3:a:openbsd:openssh:2.9p1:::::::*
cpe:2.3:a:openbsd:openssh:2.9p2:::::::*
cpe:2.3:a:openbsd:openssh:3.0:::::::*
cpe:2.3:a:openbsd:openssh:3.0.1:::::::*
cpe:2.3:a:openbsd:openssh:3.0.1p1:::::::*
cpe:2.3:a:openbsd:openssh:3.0.2:::::::*
cpe:2.3:a:openbsd:openssh:3.0.2p1:::::::*
cpe:2.3:a:openbsd:openssh:3.0p1:::::::*
cpe:2.3:a:openbsd:openssh:3.1:::::::*
cpe:2.3:a:openbsd:openssh:3.1p1:::::::*
cpe:2.3:a:openbsd:openssh:3.2:::::::*
cpe:2.3:a:openbsd:openssh:3.2.2:::::::*
cpe:2.3:a:openbsd:openssh:3.2.2p1:::::::*
cpe:2.3:a:openbsd:openssh:3.2.3p1:::::::*
cpe:2.3:a:openbsd:openssh:3.3:::::::*
cpe:2.3:a:openbsd:openssh:3.3p1:::::::*
cpe:2.3:a:openbsd:openssh:3.4:::::::*
cpe:2.3:a:openbsd:openssh:3.4p1:::::::*
cpe:2.3:a:openbsd:openssh:3.5:::::::*
cpe:2.3:a:openbsd:openssh:3.5p1:::::::*
cpe:2.3:a:openbsd:openssh:3.6:::::::*
cpe:2.3:a:openbsd:openssh:3.6.1:::::::*
cpe:2.3:a:openbsd:openssh:3.6.1p1:::::::*
cpe:2.3:a:openbsd:openssh:3.6.1p2:::::::*
cpe:2.3:a:openbsd:openssh:3.7:::::::*
cpe:2.3:a:openbsd:openssh:3.7.1:::::::*
cpe:2.3:a:openbsd:openssh:3.7.1p1:::::::*
cpe:2.3:a:openbsd:openssh:3.7.1p2:::::::*
cpe:2.3:a:openbsd:openssh:3.8:::::::*
cpe:2.3:a:openbsd:openssh:3.8.1:::::::*
cpe:2.3:a:openbsd:openssh:3.8.1p1:::::::*
cpe:2.3:a:openbsd:openssh:3.9:::::::*
cpe:2.3:a:openbsd:openssh:3.9.1:::::::*
cpe:2.3:a:openbsd:openssh:3.9.1p1:::::::*
cpe:2.3:a:openbsd:openssh:4.0:::::::*
cpe:2.3:a:openbsd:openssh:4.0p1:::::::*
cpe:2.3:a:openbsd:openssh:4.1:::::::*
cpe:2.3:a:openbsd:openssh:4.1p1:::::::*
cpe:2.3:a:openbsd:openssh:4.2:::::::*
cpe:2.3:a:openbsd:openssh:4.2p1:::::::*
cpe:2.3:a:openbsd:openssh:4.3:::::::*
cpe:2.3:a:openbsd:openssh:4.3p1:::::::*
cpe:2.3:a:openbsd:openssh:4.3p2:::::::*
cpe:2.3:a:openbsd:openssh:4.4:::::::*
cpe:2.3:a:openbsd:openssh:4.4p1:::::::*
cpe:2.3:a:openbsd:openssh:4.5:::::::*
cpe:2.3:a:openbsd:openssh:4.6:::::::*

Related information, measures and tools

No	URL	refsource
1	http://lists.grok.org.uk/pipermail/full-disclosure/2007-April/053906.html	FULLDISC
2	http://lists.grok.org.uk/pipermail/full-disclosure/2007-April/053951.html	FULLDISC
3	http://securityreason.com/securityalert/2631	SREASON
4	http://www.osvdb.org/34600	OSVDB
5	http://www.securityfocus.com/bid/23601	BID
6	https://exchange.xforce.ibmcloud.com/vulnerabilities/33794	XF
7	https://security.netapp.com/advisory/ntap-20191107-0003/	CONFIRM

Common Vulnerabilities List

No	CWE	Name	URL
1	CWE-287	不適切な認証	https://cwe.mitre.org/data/definitions/287.html

JVN Vulnerability Information

OpenSSH におけるユーザアカウントの存在を決定される脆弱性

Title	OpenSSH におけるユーザアカウントの存在を決定される脆弱性
Summary	OpenSSH には、ChallengeResponseAuthentication が有効になっている際、ユーザアカウントの存在を決定される脆弱性が存在します。本脆弱性は、CVE-2001-1483 と類似する脆弱性です。
Possible impacts	第三者により、S/KEY を介して、認証を試行されることで、ユーザアカウントが存在する場合は異なる応答を表示され、ユーザアカウントの存在を決定される可能性があります。
Solution	ベンダ情報および参考情報を参照して適切な対策を実施してください。
Publication Date	April 25, 2007, midnight
Registration Date	Sept. 25, 2012, 4:47 p.m.
Last Update	Sept. 25, 2012, 4:47 p.m.

Affected System

OpenBSD

OpenSSH 4.6 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-2007-2243	http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-2243
National Vulnerability Database (NVD)
2	CVE-2007-2243	http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2007-2243

CWE (共通脆弱性タイプ一覧)

No	Name	URL
JVNDB
1	CWE-287	https://jvndb.jvn.jp/ja/cwe/CWE-287.html

ベンダー情報

No	Name	URL
OpenSSH
1	Top Page	http://www.openssh.com/

Change Log

No	Changed Details	Date of change
0	[2012年09月25日] 掲載	Feb. 17, 2018, 10:37 a.m.

Configuration1	or higher	or less	more than	less than
cpe:2.3:a:openbsd:openssh:1.2:::::::*
cpe:2.3:a:openbsd:openssh:1.2.1:::::::*
cpe:2.3:a:openbsd:openssh:1.2.2:::::::*
cpe:2.3:a:openbsd:openssh:1.2.3:::::::*
cpe:2.3:a:openbsd:openssh:1.2.27:::::::*
cpe:2.3:a:openbsd:openssh:2.1:::::::*
cpe:2.3:a:openbsd:openssh:2.1.1:::::::*
cpe:2.3:a:openbsd:openssh:2.2:::::::*
cpe:2.3:a:openbsd:openssh:2.3:::::::*
cpe:2.3:a:openbsd:openssh:2.5:::::::*
cpe:2.3:a:openbsd:openssh:2.5.1:::::::*
cpe:2.3:a:openbsd:openssh:2.5.2:::::::*
cpe:2.3:a:openbsd:openssh:2.9:::::::*
cpe:2.3:a:openbsd:openssh:2.9.9:::::::*
cpe:2.3:a:openbsd:openssh:2.9.9p2:::::::*
cpe:2.3:a:openbsd:openssh:2.9p1:::::::*
cpe:2.3:a:openbsd:openssh:2.9p2:::::::*
cpe:2.3:a:openbsd:openssh:3.0:::::::*
cpe:2.3:a:openbsd:openssh:3.0.1:::::::*
cpe:2.3:a:openbsd:openssh:3.0.1p1:::::::*
cpe:2.3:a:openbsd:openssh:3.0.2:::::::*
cpe:2.3:a:openbsd:openssh:3.0.2p1:::::::*
cpe:2.3:a:openbsd:openssh:3.0p1:::::::*
cpe:2.3:a:openbsd:openssh:3.1:::::::*
cpe:2.3:a:openbsd:openssh:3.1p1:::::::*
cpe:2.3:a:openbsd:openssh:3.2:::::::*
cpe:2.3:a:openbsd:openssh:3.2.2:::::::*
cpe:2.3:a:openbsd:openssh:3.2.2p1:::::::*
cpe:2.3:a:openbsd:openssh:3.2.3p1:::::::*
cpe:2.3:a:openbsd:openssh:3.3:::::::*
cpe:2.3:a:openbsd:openssh:3.3p1:::::::*
cpe:2.3:a:openbsd:openssh:3.4:::::::*
cpe:2.3:a:openbsd:openssh:3.4p1:::::::*
cpe:2.3:a:openbsd:openssh:3.5:::::::*
cpe:2.3:a:openbsd:openssh:3.5p1:::::::*
cpe:2.3:a:openbsd:openssh:3.6:::::::*
cpe:2.3:a:openbsd:openssh:3.6.1:::::::*
cpe:2.3:a:openbsd:openssh:3.6.1p1:::::::*
cpe:2.3:a:openbsd:openssh:3.6.1p2:::::::*
cpe:2.3:a:openbsd:openssh:3.7:::::::*
cpe:2.3:a:openbsd:openssh:3.7.1:::::::*
cpe:2.3:a:openbsd:openssh:3.7.1p1:::::::*
cpe:2.3:a:openbsd:openssh:3.7.1p2:::::::*
cpe:2.3:a:openbsd:openssh:3.8:::::::*
cpe:2.3:a:openbsd:openssh:3.8.1:::::::*
cpe:2.3:a:openbsd:openssh:3.8.1p1:::::::*
cpe:2.3:a:openbsd:openssh:3.9:::::::*
cpe:2.3:a:openbsd:openssh:3.9.1:::::::*
cpe:2.3:a:openbsd:openssh:3.9.1p1:::::::*
cpe:2.3:a:openbsd:openssh:4.0:::::::*
cpe:2.3:a:openbsd:openssh:4.0p1:::::::*
cpe:2.3:a:openbsd:openssh:4.1:::::::*
cpe:2.3:a:openbsd:openssh:4.1p1:::::::*
cpe:2.3:a:openbsd:openssh:4.2:::::::*
cpe:2.3:a:openbsd:openssh:4.2p1:::::::*
cpe:2.3:a:openbsd:openssh:4.3:::::::*
cpe:2.3:a:openbsd:openssh:4.3p1:::::::*
cpe:2.3:a:openbsd:openssh:4.3p2:::::::*
cpe:2.3:a:openbsd:openssh:4.4:::::::*
cpe:2.3:a:openbsd:openssh:4.4p1:::::::*
cpe:2.3:a:openbsd:openssh:4.5:::::::*
cpe:2.3:a:openbsd:openssh:4.6:::::::*