NVD Vulnerability Detail

CVE-2017-7895

Summary	The NFSv2 and NFSv3 server implementations in the Linux kernel through 4.10.13 lack certain checks for the end of a buffer, which allows remote attackers to trigger pointer-arithmetic errors or possibly have unspecified other impact via crafted requests, related to fs/nfsd/nfs3xdr.c and fs/nfsd/nfsxdr.c.
Publication Date	April 28, 2017, 7:59 p.m.
Registration Date	Jan. 26, 2021, 1:29 p.m.
Last Update	Nov. 21, 2024, 12:32 p.m.

CVSS3.1 : CRITICAL
スコア	9.8
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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)	変更なし
機密性への影響(C)	高
完全性への影響(I)	高
可用性への影響(A)	高

CVSS2.0 : HIGH
Score	10.0
Vector	AV:N/AC:L/Au:N/C:C/I:C/A:C
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)	高
完全性への影響(I)	高
可用性への影響(A)	高
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:o:linux:linux_kernel::::::::				3.2.89
cpe:2.3:o:linux:linux_kernel::::::::	3.3			3.16.44
cpe:2.3:o:linux:linux_kernel::::::::	3.17.0			4.1.40
cpe:2.3:o:linux:linux_kernel::::::::	4.2			4.4.67
cpe:2.3:o:linux:linux_kernel::::::::	4.5.0			4.9.26
cpe:2.3:o:linux:linux_kernel::::::::	4.10			4.10.14

Configuration2	or higher	or less	more than	less than
cpe:2.3:o:debian:debian_linux:8.0:::::::*
cpe:2.3:o:debian:debian_linux:9.0:::::::*

Related information, measures and tools

No	URL	タグ
1	http://www.debian.org/security/2017/dsa-3886	Third Party Advisory
2	http://www.debian.org/security/2017/dsa-3886	Third Party Advisory
3	http://www.securityfocus.com/bid/98085	Third Party Advisory VDB Entry
4	http://www.securityfocus.com/bid/98085	Third Party Advisory VDB Entry
5	https://access.redhat.com/errata/RHSA-2017:1615	Third Party Advisory
6	https://access.redhat.com/errata/RHSA-2017:1615	Third Party Advisory
7	https://access.redhat.com/errata/RHSA-2017:1616	Third Party Advisory
8	https://access.redhat.com/errata/RHSA-2017:1616	Third Party Advisory
9	https://access.redhat.com/errata/RHSA-2017:1647	Third Party Advisory
10	https://access.redhat.com/errata/RHSA-2017:1647	Third Party Advisory
11	https://access.redhat.com/errata/RHSA-2017:1715	Third Party Advisory
12	https://access.redhat.com/errata/RHSA-2017:1715	Third Party Advisory
13	https://access.redhat.com/errata/RHSA-2017:1723	Third Party Advisory
14	https://access.redhat.com/errata/RHSA-2017:1723	Third Party Advisory
15	https://access.redhat.com/errata/RHSA-2017:1766	Third Party Advisory
16	https://access.redhat.com/errata/RHSA-2017:1766	Third Party Advisory
17	https://access.redhat.com/errata/RHSA-2017:1798	Third Party Advisory
18	https://access.redhat.com/errata/RHSA-2017:1798	Third Party Advisory
19	https://access.redhat.com/errata/RHSA-2017:2412	Third Party Advisory
20	https://access.redhat.com/errata/RHSA-2017:2412	Third Party Advisory
21	https://access.redhat.com/errata/RHSA-2017:2428	Third Party Advisory
22	https://access.redhat.com/errata/RHSA-2017:2428	Third Party Advisory
23	https://access.redhat.com/errata/RHSA-2017:2429	Third Party Advisory
24	https://access.redhat.com/errata/RHSA-2017:2429	Third Party Advisory
25	https://access.redhat.com/errata/RHSA-2017:2472	Third Party Advisory
26	https://access.redhat.com/errata/RHSA-2017:2472	Third Party Advisory
27	https://access.redhat.com/errata/RHSA-2017:2732	Third Party Advisory
28	https://access.redhat.com/errata/RHSA-2017:2732	Third Party Advisory
29	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=13bf9fbff0e5e099e2b6f003a0ab8ae145436309	Patch Third Party Advisory
30	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=13bf9fbff0e5e099e2b6f003a0ab8ae145436309	Patch Third Party Advisory
31	https://github.com/torvalds/linux/commit/13bf9fbff0e5e099e2b6f003a0ab8ae145436309	Patch Third Party Advisory
32	https://github.com/torvalds/linux/commit/13bf9fbff0e5e099e2b6f003a0ab8ae145436309	Patch Third Party Advisory

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

Linux Kernel の NFSv2/NFSv3 サーバの実装におけるポインタ演算エラーを誘発される脆弱性

Title	Linux Kernel の NFSv2/NFSv3 サーバの実装におけるポインタ演算エラーを誘発される脆弱性
Summary	Linux Kernel の NFSv2/NFSv3 サーバの実装は、バッファの終端に対する特定のチェックが欠落しているため、ポインタ演算エラー (pointer-arithmetic error) を誘発されるなど、不特定の影響を受ける脆弱性が存在します。
Possible impacts	リモートの攻撃者により、巧妙に細工されたリクエストを介して、ポインタ演算エラー (pointer-arithmetic error) を誘発されるなど、不特定の影響を受け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	April 22, 2017, midnight
Registration Date	June 2, 2017, 4:31 p.m.
Last Update	June 2, 2017, 4:31 p.m.

Affected System

Linux

Linux Kernel 4.10.13 まで

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-2017-7895	http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7895
National Vulnerability Database (NVD)
2	CVE-2017-7895	https://nvd.nist.gov/vuln/detail/CVE-2017-7895

CWE (共通脆弱性タイプ一覧)

No	Name	URL
JVNDB
1	CWE-189	https://jvndb.jvn.jp/ja/cwe/CWE-189.html

ベンダー情報

No	Name	URL
GitHub
1	nfsd: stricter decoding of write-like NFSv2/v3 ops	https://github.com/torvalds/linux/commit/13bf9fbff0e5e099e2b6f003a0ab8ae145436309
Linux Kernel
2	Linux Kernel Archives	http://www.kernel.org
Linux kernel source tree
3	nfsd: stricter decoding of write-like NFSv2/v3 ops	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=13bf9fbff0e5e099e2b6f003a0ab8ae145436309

Change Log

No	Changed Details	Date of change
0	[2017年06月02日] 掲載	Feb. 17, 2018, 10:37 a.m.