NVD Vulnerability Detail

CVE-2015-5252

Summary	vfs.c in smbd in Samba 3.x and 4.x before 4.1.22, 4.2.x before 4.2.7, and 4.3.x before 4.3.3, when share names with certain substring relationships exist, allows remote attackers to bypass intended file-access restrictions via a symlink that points outside of a share.
Publication Date	Dec. 30, 2015, 7:59 a.m.
Registration Date	Jan. 26, 2021, 2:52 p.m.
Last Update	Nov. 21, 2024, 11:32 a.m.

CVSS3.1 : HIGH
スコア	7.2
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/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)	変更あり
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)	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:samba:samba::::::::	4.3.0			4.3.3
cpe:2.3:a:samba:samba::::::::	4.2.0			4.2.7
cpe:2.3:a:samba:samba::::::::	3.0.0			4.1.22

Configuration2	or higher	or less	more than	less than
cpe:2.3:o:canonical:ubuntu_linux:15.10:::::::*
cpe:2.3:o:canonical:ubuntu_linux:15.04:::::::*
cpe:2.3:o:canonical:ubuntu_linux:14.04::::esm:::
cpe:2.3:o:canonical:ubuntu_linux:12.04::::-:::

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:7.0:::::::*

Related information, measures and tools

No	URL	タグ
1	http://lists.fedoraproject.org/pipermail/package-announce/2015-December/174076.html	Third Party Advisory
2	http://lists.fedoraproject.org/pipermail/package-announce/2015-December/174076.html	Third Party Advisory
3	http://lists.fedoraproject.org/pipermail/package-announce/2015-December/174391.html	Third Party Advisory
4	http://lists.fedoraproject.org/pipermail/package-announce/2015-December/174391.html	Third Party Advisory
5	http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00019.html	Mailing List Third Party Advisory
6	http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00019.html	Mailing List Third Party Advisory
7	http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00020.html	Mailing List Third Party Advisory
8	http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00020.html	Mailing List Third Party Advisory
9	http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00032.html	Mailing List Third Party Advisory
10	http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00032.html	Mailing List Third Party Advisory
11	http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00033.html	Mailing List Third Party Advisory
12	http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00033.html	Mailing List Third Party Advisory
13	http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00002.html	Mailing List Third Party Advisory
14	http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00002.html	Mailing List Third Party Advisory
15	http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00017.html	Mailing List Third Party Advisory
16	http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00017.html	Mailing List Third Party Advisory
17	http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00042.html	Mailing List Third Party Advisory
18	http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00042.html	Mailing List Third Party Advisory
19	http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00046.html	Mailing List Third Party Advisory
20	http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00046.html	Mailing List Third Party Advisory
21	http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00047.html	Mailing List Third Party Advisory
22	http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00047.html	Mailing List Third Party Advisory
23	http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00048.html	Mailing List Third Party Advisory
24	http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00048.html	Mailing List Third Party Advisory
25	http://www.debian.org/security/2016/dsa-3433	Third Party Advisory
26	http://www.debian.org/security/2016/dsa-3433	Third Party Advisory
27	http://www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.html	Third Party Advisory
28	http://www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.html	Third Party Advisory
29	http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html	Third Party Advisory
30	http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html	Third Party Advisory
31	http://www.securityfocus.com/bid/79733	Third Party Advisory VDB Entry
32	http://www.securityfocus.com/bid/79733	Third Party Advisory VDB Entry
33	http://www.securitytracker.com/id/1034493	Third Party Advisory VDB Entry
34	http://www.securitytracker.com/id/1034493	Third Party Advisory VDB Entry
35	http://www.ubuntu.com/usn/USN-2855-1	Third Party Advisory
36	http://www.ubuntu.com/usn/USN-2855-1	Third Party Advisory
37	http://www.ubuntu.com/usn/USN-2855-2	Third Party Advisory
38	http://www.ubuntu.com/usn/USN-2855-2	Third Party Advisory
39	https://bugzilla.redhat.com/show_bug.cgi?id=1290288	Issue Tracking Third Party Advisory
40	https://bugzilla.redhat.com/show_bug.cgi?id=1290288	Issue Tracking Third Party Advisory
41	https://git.samba.org/?p=samba.git%3Ba=commit%3Bh=4278ef25f64d5fdbf432ff1534e275416ec9561e
42	https://git.samba.org/?p=samba.git%3Ba=commit%3Bh=4278ef25f64d5fdbf432ff1534e275416ec9561e
43	https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05115993	Third Party Advisory
44	https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05115993	Third Party Advisory
45	https://security.gentoo.org/glsa/201612-47	Third Party Advisory
46	https://security.gentoo.org/glsa/201612-47	Third Party Advisory
47	https://www.samba.org/samba/security/CVE-2015-5252.html	Exploit Vendor Advisory
48	https://www.samba.org/samba/security/CVE-2015-5252.html	Exploit Vendor Advisory

Common Vulnerabilities List

No	CWE	Name	URL
1	CWE-264	認可・権限・アクセス制御	https://cwe.mitre.org/data/definitions/264.html

JVN Vulnerability Information

Samba の smbd の vfs.c におけるファイルへのアクセス制限を回避される脆弱性

Title	Samba の smbd の vfs.c におけるファイルへのアクセス制限を回避される脆弱性
Summary	Samba の smbd の vfs.c には、特定の部分文字列関係を持つ共有名が存在する場合、ファイルへのアクセス制限を回避される脆弱性が存在します。
Possible impacts	第三者により、共有外を指すシンボリックリンクを介して、ファイルへのアクセス制限を回避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	Dec. 10, 2015, midnight
Registration Date	Jan. 5, 2016, 1:57 p.m.
Last Update	Jan. 5, 2016, 1:57 p.m.

Affected System

Samba Project

Samba 3.x

Samba 4.1.22 未満の 4.x

Samba 4.2.7 未満の 4.2.x

Samba 4.3.3 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-2015-5252	http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-5252
National Vulnerability Database (NVD)
2	CVE-2015-5252	http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-5252
Samba
3	CVE-2015-5252: s3: smbd: Fix symlink verification (file access outside the share).	https://git.samba.org/?p=samba.git;a=commit;h=4278ef25f64d5fdbf432ff1534e275416ec9561e
Samba Security Announcement
4	CVE-2015-5252.html	https://www.samba.org/samba/security/CVE-2015-5252.html

CWE (共通脆弱性タイプ一覧)

No	Name	URL
JVNDB
1	CWE-264	https://jvndb.jvn.jp/ja/cwe/CWE-264.html

ベンダー情報

No	Name	URL
Red Hat Bugzilla
1	Bug 1290288	https://bugzilla.redhat.com/show_bug.cgi?id=1290288

Change Log

No	Changed Details	Date of change
0	[2016年01月05日] 掲載	Feb. 17, 2018, 10:37 a.m.