NVD脆弱性詳細

CVE-2018-18281

概要	Since Linux kernel version 3.2, the mremap() syscall performs TLB flushes after dropping pagetable locks. If a syscall such as ftruncate() removes entries from the pagetables of a task that is in the middle of mremap(), a stale TLB entry can remain for a short time that permits access to a physical page after it has been released back to the page allocator and reused. This is fixed in the following kernel versions: 4.9.135, 4.14.78, 4.18.16, 4.19.
公表日	2018年10月31日3:29
登録日	2021年3月1日19:09
最終更新日	2024年11月21日12:55

CVSS3.0 : HIGH
スコア	7.8
ベクター	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
攻撃元区分(AV)	ローカル
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 : MEDIUM
スコア	4.6
ベクター	AV:L/AC:L/Au:N/C:P/I:P/A:P
攻撃元区分(AV)	ローカル
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)	低
可用性への影響(A)	低
全ての特権を取得	いいえ
ユーザー権限を取得	いいえ
その他の権限を取得	いいえ
ユーザー操作が必要	いいえ

影響を受けるソフトウェアの構成

構成1	以上	以下	より上	未満
cpe:2.3:o:linux:linux_kernel::::::::	4.9.136			4.14.78
cpe:2.3:o:linux:linux_kernel::::::::	3.2			4.9.135
cpe:2.3:o:linux:linux_kernel::::::::	4.18.17			4.19
cpe:2.3:o:linux:linux_kernel::::::::	4.14.79			4.18.16

構成2	以上	以下	より上	未満
cpe:2.3:o:canonical:ubuntu_linux:16.04::::lts:::
cpe:2.3:o:canonical:ubuntu_linux:14.04::::lts:::
cpe:2.3:o:canonical:ubuntu_linux:12.04::::esm:::
cpe:2.3:o:canonical:ubuntu_linux:18.04::::lts:::
cpe:2.3:o:canonical:ubuntu_linux:18.10:::::::*

構成3		以上	以下	より上	未満
cpe:2.3:o:debian:debian_linux:8.0:::::::*

関連情報、対策とツール

No	URL	タグ
1	http://packetstormsecurity.com/files/150001/Linux-mremap-TLB-Flush-Too-Late.html	Patch Third Party Advisory VDB Entry
2	http://packetstormsecurity.com/files/150001/Linux-mremap-TLB-Flush-Too-Late.html	Patch Third Party Advisory VDB Entry
3	http://www.openwall.com/lists/oss-security/2018/10/29/5	Mailing List Patch Third Party Advisory
4	http://www.openwall.com/lists/oss-security/2018/10/29/5	Mailing List Patch Third Party Advisory
5	http://www.securityfocus.com/bid/105761	Third Party Advisory VDB Entry
6	http://www.securityfocus.com/bid/105761	Third Party Advisory VDB Entry
7	http://www.securityfocus.com/bid/106503	Third Party Advisory VDB Entry
8	http://www.securityfocus.com/bid/106503	Third Party Advisory VDB Entry
9	https://access.redhat.com/errata/RHSA-2019:0831
10	https://access.redhat.com/errata/RHSA-2019:0831
11	https://access.redhat.com/errata/RHSA-2019:2029
12	https://access.redhat.com/errata/RHSA-2019:2029
13	https://access.redhat.com/errata/RHSA-2019:2043
14	https://access.redhat.com/errata/RHSA-2019:2043
15	https://access.redhat.com/errata/RHSA-2020:0036
16	https://access.redhat.com/errata/RHSA-2020:0036
17	https://access.redhat.com/errata/RHSA-2020:0100
18	https://access.redhat.com/errata/RHSA-2020:0100
19	https://access.redhat.com/errata/RHSA-2020:0103
20	https://access.redhat.com/errata/RHSA-2020:0103
21	https://access.redhat.com/errata/RHSA-2020:0179
22	https://access.redhat.com/errata/RHSA-2020:0179
23	https://bugs.chromium.org/p/project-zero/issues/detail?id=1695	Exploit Patch Third Party Advisory
24	https://bugs.chromium.org/p/project-zero/issues/detail?id=1695	Exploit Patch Third Party Advisory
25	https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.78	Patch Vendor Advisory
26	https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.78	Patch Vendor Advisory
27	https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.16	Patch Vendor Advisory
28	https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.16	Patch Vendor Advisory
29	https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.135	Patch Vendor Advisory
30	https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.135	Patch Vendor Advisory
31	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=eb66ae030829605d61fbef1909ce310e29f78821	Patch Vendor Advisory
32	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=eb66ae030829605d61fbef1909ce310e29f78821	Patch Vendor Advisory
33	https://lists.debian.org/debian-lts-announce/2019/03/msg00017.html	Mailing List Third Party Advisory
34	https://lists.debian.org/debian-lts-announce/2019/03/msg00017.html	Mailing List Third Party Advisory
35	https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html	Mailing List Third Party Advisory
36	https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html	Mailing List Third Party Advisory
37	https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html	Mailing List Third Party Advisory
38	https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html	Mailing List Third Party Advisory
39	https://usn.ubuntu.com/3832-1/	Third Party Advisory
40	https://usn.ubuntu.com/3832-1/	Third Party Advisory
41	https://usn.ubuntu.com/3835-1/	Third Party Advisory
42	https://usn.ubuntu.com/3835-1/	Third Party Advisory
43	https://usn.ubuntu.com/3871-1/	Third Party Advisory
44	https://usn.ubuntu.com/3871-1/	Third Party Advisory
45	https://usn.ubuntu.com/3871-3/	Third Party Advisory
46	https://usn.ubuntu.com/3871-3/	Third Party Advisory
47	https://usn.ubuntu.com/3871-4/	Third Party Advisory
48	https://usn.ubuntu.com/3871-4/	Third Party Advisory
49	https://usn.ubuntu.com/3871-5/	Third Party Advisory
50	https://usn.ubuntu.com/3871-5/	Third Party Advisory
51	https://usn.ubuntu.com/3880-1/	Third Party Advisory
52	https://usn.ubuntu.com/3880-1/	Third Party Advisory
53	https://usn.ubuntu.com/3880-2/	Third Party Advisory
54	https://usn.ubuntu.com/3880-2/	Third Party Advisory

共通脆弱性一覧

No	CWE	名前	URL
1	CWE-459	不完全なクリーンアップ	https://cwe.mitre.org/data/definitions/459.html

JVN脆弱性情報

Linux Kernel における入力確認に関する脆弱性

タイトル	Linux Kernel における入力確認に関する脆弱性
概要	Linux Kernel には、入力確認に関する脆弱性が存在します。
想定される影響	情報を取得される、情報を改ざんされる、およびサービス運用妨害 (DoS) 状態にされる可能性があります。
対策	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。
公表日	2018年10月18日0:00
登録日	2019年3月11日17:20
最終更新日	2019年3月11日17:20

影響を受けるシステム

Canonical

Ubuntu

Linux

Linux Kernel 3.2

CVE (情報セキュリティ共通脆弱性識別子)

No	名前	URL
Common Vulnerabilities and Exposures (CVE)
1	CVE-2018-18281	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18281
2	CVE-2018-18281	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18281
National Vulnerability Database (NVD)
3	CVE-2018-18281	https://nvd.nist.gov/vuln/detail/CVE-2018-18281
4	CVE-2018-18281	https://nvd.nist.gov/vuln/detail/CVE-2018-18281

CWE (共通脆弱性タイプ一覧)

No	名前	URL
JVNDB
1	CWE-20	https://jvndb.jvn.jp/ja/cwe/CWE-20.html
2	CWE-20	https://jvndb.jvn.jp/ja/cwe/CWE-20.html

ベンダー情報

No	名前	URL
Chromium
1	Issue 1695	https://bugs.chromium.org/p/project-zero/issues/detail?id=1695
2	Issue 1695	https://bugs.chromium.org/p/project-zero/issues/detail?id=1695
kernel.org
3	ARC: build: Don't set CROSS_COMPILE in arch's Makefile	https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.16
4	ARC: build: Don't set CROSS_COMPILE in arch's Makefile	https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.16
5	HV: properly delay KVP packets when negotiation is in progress	https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.135
6	HV: properly delay KVP packets when negotiation is in progress	https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.135
7	IB/hfi1: Fix destroy_qp hang after a link down	https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.78
8	IB/hfi1: Fix destroy_qp hang after a link down	https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.78
Linux Kernel
9	Linux Kernel Archives	http://www.kernel.org
10	Linux Kernel Archives	http://www.kernel.org
Linux kernel source tree
11	mremap: properly flush TLB before releasing the page	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=eb66ae030829605d61fbef1909ce310e29f78821
12	mremap: properly flush TLB before releasing the page	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=eb66ae030829605d61fbef1909ce310e29f78821
Ubuntu Security Notice
13	USN-3832-1	https://usn.ubuntu.com/3832-1/
14	USN-3832-1	https://usn.ubuntu.com/3832-1/
15	USN-3835-1	https://usn.ubuntu.com/3835-1/
16	USN-3835-1	https://usn.ubuntu.com/3835-1/
17	USN-3871-1	https://usn.ubuntu.com/3871-1/
18	USN-3871-1	https://usn.ubuntu.com/3871-1/
19	USN-3871-3	https://usn.ubuntu.com/3871-3/
20	USN-3871-3	https://usn.ubuntu.com/3871-3/
21	USN-3871-4	https://usn.ubuntu.com/3871-4/
22	USN-3871-4	https://usn.ubuntu.com/3871-4/
23	USN-3871-5	https://usn.ubuntu.com/3871-5/
24	USN-3871-5	https://usn.ubuntu.com/3871-5/
25	USN-3880-1	https://usn.ubuntu.com/3880-1/
26	USN-3880-1	https://usn.ubuntu.com/3880-1/
27	USN-3880-2	https://usn.ubuntu.com/3880-2/
28	USN-3880-2	https://usn.ubuntu.com/3880-2/

その他

No	名前	URL
関連文書
1	Linux kernel: TLB flush happens too late on mremap (CVE-2018-18281; fixed in 4.9.135, 4.14.78, 4.18.16, 4.19)	https://www.openwall.com/lists/oss-security/2018/10/29/5
2	Linux kernel: TLB flush happens too late on mremap (CVE-2018-18281; fixed in 4.9.135, 4.14.78, 4.18.16, 4.19)	https://www.openwall.com/lists/oss-security/2018/10/29/5
3	Linux mremap() TLB Flush Too Late	https://packetstormsecurity.com/files/150001/Linux-mremap-TLB-Flush-Too-Late.html
4	Linux mremap() TLB Flush Too Late	https://packetstormsecurity.com/files/150001/Linux-mremap-TLB-Flush-Too-Late.html

変更履歴

No	変更内容	変更日
1	[2019年03月11日] 掲載	2019年3月11日17:20