NVD Vulnerability Detail

CVE-2016-2119

Summary	libcli/smb/smbXcli_base.c in Samba 4.x before 4.2.14, 4.3.x before 4.3.11, and 4.4.x before 4.4.5 allows man-in-the-middle attackers to bypass a client-signing protection mechanism, and consequently spoof SMB2 and SMB3 servers, via the (1) SMB2_SESSION_FLAG_IS_GUEST or (2) SMB2_SESSION_FLAG_IS_NULL flag.
Publication Date	July 8, 2016, 12:59 a.m.
Registration Date	Jan. 26, 2021, 2:08 p.m.
Last Update	Nov. 21, 2024, 11:47 a.m.

Affected software configurations

Related information, measures and tools

No	URL	タグ
1	http://lists.opensuse.org/opensuse-updates/2016-07/msg00060.html	Mailing List Third Party Advisory
2	http://lists.opensuse.org/opensuse-updates/2016-07/msg00060.html	Mailing List Third Party Advisory
3	http://rhn.redhat.com/errata/RHSA-2016-1486.html	Third Party Advisory
4	http://rhn.redhat.com/errata/RHSA-2016-1486.html	Third Party Advisory
5	http://rhn.redhat.com/errata/RHSA-2016-1487.html	Third Party Advisory
6	http://rhn.redhat.com/errata/RHSA-2016-1487.html	Third Party Advisory
7	http://rhn.redhat.com/errata/RHSA-2016-1494.html	Third Party Advisory
8	http://rhn.redhat.com/errata/RHSA-2016-1494.html	Third Party Advisory
9	http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html	Third Party Advisory
10	http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html	Third Party Advisory
11	http://www.securityfocus.com/bid/91700	Third Party Advisory VDB Entry
12	http://www.securityfocus.com/bid/91700	Third Party Advisory VDB Entry
13	http://www.securitytracker.com/id/1036244	Third Party Advisory VDB Entry
14	http://www.securitytracker.com/id/1036244	Third Party Advisory VDB Entry
15	https://security.gentoo.org/glsa/201805-07	Third Party Advisory
16	https://security.gentoo.org/glsa/201805-07	Third Party Advisory
17	https://www.samba.org/samba/security/CVE-2016-2119.html	Vendor Advisory
18	https://www.samba.org/samba/security/CVE-2016-2119.html	Vendor Advisory

Common Vulnerabilities List

No	CWE	Name	URL
1	CWE-94	コード・インジェクション	https://cwe.mitre.org/data/definitions/94.html

JVN Vulnerability Information

Samba の libcli/smb/smbXcli_base.c におけるクライアント署名の保護メカニズムを回避される脆弱性

Title	Samba の libcli/smb/smbXcli_base.c におけるクライアント署名の保護メカニズムを回避される脆弱性
Summary	Samba の libcli/smb/smbXcli_base.c には、クライアント署名の保護メカニズムを回避され、その結果、SMB2 および SMB3 サーバになりすまされる脆弱性が存在します。補足情報 : CWE による脆弱性タイプは、CWE-284: Improper Access Control (不適切なアクセス制御) と識別されています。 http://cwe.mitre.org/data/definitions/284.html
Possible impacts	中間者攻撃 (man-in-the-middle attack) により、(1) SMB2_SESSION_FLAG_IS_GUEST または (2) SMB2_SESSION_FLAG_IS_NULL フラグを介して、クライアント署名の保護メカニズムを回避され、その結果、SMB2 および SMB3 サーバになりすま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	July 7, 2016, midnight
Registration Date	July 12, 2016, 11:51 a.m.
Last Update	July 12, 2016, 11:51 a.m.

Affected System

Samba Project

Samba 4.2.14 未満の 4.x

Samba 4.3.11 未満の 4.3.x

Samba 4.4.5 未満の 4.4.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-2016-2119	http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2119
National Vulnerability Database (NVD)
2	CVE-2016-2119	http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-2119

CWE (共通脆弱性タイプ一覧)

No	Name	URL
JVNDB
1	CWE-Other	https://www.ipa.go.jp/security/vuln/CWE.html#CWEOther

ベンダー情報

No	Name	URL
Samba Security Announcement
1	Client side SMB2/3 required signing can be downgraded	https://www.samba.org/samba/security/CVE-2016-2119.html
Samba Security Releases
2	07 Jul 2016	https://www.samba.org/samba/history/security.html

Change Log

No	Changed Details	Date of change
0	[2016年07月12日] 掲載	Feb. 17, 2018, 10:37 a.m.