NVD Vulnerability Detail

CVE-2016-3115

Summary	Multiple CRLF injection vulnerabilities in session.c in sshd in OpenSSH before 7.2p2 allow remote authenticated users to bypass intended shell-command restrictions via crafted X11 forwarding data, related to the (1) do_authenticated1 and (2) session_x11_req functions.
Publication Date	March 22, 2016, 7:59 p.m.
Registration Date	Jan. 26, 2021, 2:10 p.m.
Last Update	Nov. 21, 2024, 11:49 a.m.

CVSS3.0 : MEDIUM
スコア	6.4
Vector	CVSS:3.0/AV:N/AC:L/PR:L/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)	低
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	5.5
Vector	AV:N/AC:L/Au:S/C:P/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)	単一
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
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::p1::::::*			7.2

Configuration2		or higher	or less	more than	less than
cpe:2.3:o:oracle:vm_server:3.2:::::::*

Related information, measures and tools

No	URL	タグ
1	http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/session.c
2	http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/session.c
3	http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/session.c.diff?r1=1.281&r2=1.282&f=h
4	http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/session.c.diff?r1=1.281&r2=1.282&f=h
5	http://lists.fedoraproject.org/pipermail/package-announce/2016-April/183101.html
6	http://lists.fedoraproject.org/pipermail/package-announce/2016-April/183101.html
7	http://lists.fedoraproject.org/pipermail/package-announce/2016-April/183122.html
8	http://lists.fedoraproject.org/pipermail/package-announce/2016-April/183122.html
9	http://lists.fedoraproject.org/pipermail/package-announce/2016-March/178838.html
10	http://lists.fedoraproject.org/pipermail/package-announce/2016-March/178838.html
11	http://lists.fedoraproject.org/pipermail/package-announce/2016-March/179924.html
12	http://lists.fedoraproject.org/pipermail/package-announce/2016-March/179924.html
13	http://lists.fedoraproject.org/pipermail/package-announce/2016-March/180491.html
14	http://lists.fedoraproject.org/pipermail/package-announce/2016-March/180491.html
15	http://lists.fedoraproject.org/pipermail/package-announce/2016-May/184264.html
16	http://lists.fedoraproject.org/pipermail/package-announce/2016-May/184264.html
17	http://packetstormsecurity.com/files/136234/OpenSSH-7.2p1-xauth-Command-Injection-Bypass.html
18	http://packetstormsecurity.com/files/136234/OpenSSH-7.2p1-xauth-Command-Injection-Bypass.html
19	http://rhn.redhat.com/errata/RHSA-2016-0465.html
20	http://rhn.redhat.com/errata/RHSA-2016-0465.html
21	http://rhn.redhat.com/errata/RHSA-2016-0466.html
22	http://rhn.redhat.com/errata/RHSA-2016-0466.html
23	http://seclists.org/fulldisclosure/2016/Mar/46
24	http://seclists.org/fulldisclosure/2016/Mar/46
25	http://seclists.org/fulldisclosure/2016/Mar/47
26	http://seclists.org/fulldisclosure/2016/Mar/47
27	http://www.openssh.com/txt/x11fwd.adv	Vendor Advisory
28	http://www.openssh.com/txt/x11fwd.adv	Vendor Advisory
29	http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
30	http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
31	http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
32	http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
33	http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html	Vendor Advisory
34	http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html	Vendor Advisory
35	http://www.securityfocus.com/bid/84314
36	http://www.securityfocus.com/bid/84314
37	http://www.securitytracker.com/id/1035249
38	http://www.securitytracker.com/id/1035249
39	https://bto.bluecoat.com/security-advisory/sa121
40	https://bto.bluecoat.com/security-advisory/sa121
41	https://github.com/tintinweb/pub/tree/master/pocs/cve-2016-3115
42	https://github.com/tintinweb/pub/tree/master/pocs/cve-2016-3115
43	https://lists.debian.org/debian-lts-announce/2018/09/msg00010.html
44	https://lists.debian.org/debian-lts-announce/2018/09/msg00010.html
45	https://security.gentoo.org/glsa/201612-18
46	https://security.gentoo.org/glsa/201612-18
47	https://www.exploit-db.com/exploits/39569/
48	https://www.exploit-db.com/exploits/39569/
49	https://www.freebsd.org/security/advisories/FreeBSD-SA-16:14.openssh.asc
50	https://www.freebsd.org/security/advisories/FreeBSD-SA-16:14.openssh.asc

Common Vulnerabilities List

JVN Vulnerability Information

OpenSSH の sshd の session.c における CRLF インジェクションの脆弱性

Title	OpenSSH の sshd の session.c における CRLF インジェクションの脆弱性
Summary	OpenSSH の sshd の session.c には、(1) do_authenticated1 および (2) session_x11_req 関数に関する処理に不備があるため、CRLF インジェクションの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-93: Improper Neutralization of CRLF Sequences (CRLF インジェクション) と識別されています。 http://cwe.mitre.org/data/definitions/93.html
Possible impacts	リモート認証されたユーザにより、巧妙に細工された X11 forwarding データを介して、シェルコマンド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	March 9, 2016, midnight
Registration Date	March 23, 2016, 5:45 p.m.
Last Update	Nov. 17, 2016, 4:29 p.m.

Affected System

オラクル

Oracle VM サーバー

OpenBSD

OpenSSH 7.2p2 未満

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-2016-3115	http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-3115
National Vulnerability Database (NVD)
2	CVE-2016-3115	http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-3115

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
OpenBSD
1	CVS log for src/usr.bin/ssh/session.c	http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/session.c
2	Diff for /src/usr.bin/ssh/session.c between version 1.281 and 1.282	http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/session.c.diff?r1=1.281&r2=1.282&f=h
OpenSSH
3	OpenSSH Security Advisory: x11fwd.adv	http://www.openssh.com/txt/x11fwd.adv
4	Security - March 9, 2016	http://www.openssh.com/security.html
5	Top Page	http://www.openssh.com/
Oracle Technology Network
6	Oracle Linux Bulletin - April 2016	http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
7	Oracle Solaris Third Party Bulletin - April 2016	http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
8	Oracle VM Server for x86 Bulletin - July 2016	http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
Turbolinux Security Advisory
9	TLSA-2016-10	http://www.turbolinux.co.jp/security/2016/TLSA-2016-10j.html

Change Log

No	Changed Details	Date of change
0	[2016年03月23日] 掲載 [2016年03月24日] ベンダ情報：ターボリナックス (TLSA-2016-10) を追加 [2016年11月17日] 影響を受けるシステム：ベンダ情報の追加に伴い内容を更新ベンダ情報：オラクル (Oracle VM Server for x86 Bulletin - July 2016) を追加ベンダ情報：オラクル (Oracle Linux Bulletin - April 2016) を追加ベンダ情報：オラクル (Oracle Solaris Third Party Bulletin - April 2016) を追加	Feb. 17, 2018, 10:37 a.m.