NVD Vulnerability Detail

CVE-2019-9213

Summary	In the Linux kernel before 4.20.14, expand_downwards in mm/mmap.c lacks a check for the mmap minimum address, which makes it easier for attackers to exploit kernel NULL pointer dereferences on non-SMAP platforms. This is related to a capability check for the wrong task.
Publication Date	March 6, 2019, 7:29 a.m.
Registration Date	Jan. 26, 2021, 11:45 a.m.
Last Update	Nov. 21, 2024, 1:51 p.m.

CVSS3.1 : MEDIUM
スコア	5.5
Vector	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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)	なし
完全性への影響(I)	なし
可用性への影響(A)	高

CVSS2.0 : MEDIUM
Score	4.9
Vector	AV:L/AC:L/Au:N/C:N/I:N/A:C
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)	なし
完全性への影響(I)	なし
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::::::::	4.9			4.9.162
cpe:2.3:o:linux:linux_kernel::::::::	4.14			4.14.105
cpe:2.3:o:linux:linux_kernel::::::::	4.19			4.19.27
cpe:2.3:o:linux:linux_kernel::::::::	4.20			4.20.14

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

Configuration3	or higher	or less	more than	less than
cpe:2.3:o:redhat:enterprise_linux:7.0:::::::*
cpe:2.3:o:redhat:enterprise_linux:8.0:::::::*

Configuration4	or higher	or less	more than	less than
cpe:2.3:o:opensuse:leap:42.3:::::::*
cpe:2.3:o:opensuse:leap:15.0:::::::*

Configuration5	or higher	or less	more than	less than
cpe:2.3:o:canonical:ubuntu_linux:18.10:::::::*
cpe:2.3:o:canonical:ubuntu_linux:14.04::::esm:::
cpe:2.3:o:canonical:ubuntu_linux:16.04::::esm:::
cpe:2.3:o:canonical:ubuntu_linux:12.04:::::::*

Related information, measures and tools

No	URL	タグ
1	http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0a1d52994d440e21def1c2174932410b4f2a98a1	Patch Vendor Advisory
2	http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00045.html	Mailing List Third Party Advisory
3	http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00052.html	Mailing List Third Party Advisory
4	http://packetstormsecurity.com/files/156053/Reliable-Datagram-Sockets-RDS-rds_atomic_free_op-Privilege-Escalation.html	Exploit Third Party Advisory VDB Entry
5	http://www.securityfocus.com/bid/107296	Third Party Advisory VDB Entry
6	https://access.redhat.com/errata/RHSA-2019:0831	Third Party Advisory
7	https://access.redhat.com/errata/RHSA-2019:1479	Third Party Advisory
8	https://access.redhat.com/errata/RHSA-2019:1480	Third Party Advisory
9	https://bugs.chromium.org/p/project-zero/issues/detail?id=1792	Exploit Mailing List Third Party Advisory
10	https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.105	Mailing List Patch Vendor Advisory
11	https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.27	Mailing List Patch Vendor Advisory
12	https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.14	Mailing List Patch Vendor Advisory
13	https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.162	Mailing List Patch Vendor Advisory
14	https://github.com/torvalds/linux/commit/0a1d52994d440e21def1c2174932410b4f2a98a1	Mailing List Patch Vendor Advisory
15	https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html	Mailing List Third Party Advisory
16	https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html	Mailing List Third Party Advisory
17	https://lists.debian.org/debian-lts-announce/2019/05/msg00002.html	Mailing List Third Party Advisory
18	https://usn.ubuntu.com/3930-1/	Third Party Advisory
19	https://usn.ubuntu.com/3930-2/	Third Party Advisory
20	https://usn.ubuntu.com/3931-1/	Third Party Advisory
21	https://usn.ubuntu.com/3931-2/	Third Party Advisory
22	https://usn.ubuntu.com/3932-1/	Third Party Advisory
23	https://usn.ubuntu.com/3932-2/	Third Party Advisory
24	https://usn.ubuntu.com/3933-1/	Third Party Advisory
25	https://usn.ubuntu.com/3933-2/	Third Party Advisory
26	https://www.exploit-db.com/exploits/46502/	Exploit Third Party Advisory VDB Entry
27	http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0a1d52994d440e21def1c2174932410b4f2a98a1	Patch Vendor Advisory
28	https://www.exploit-db.com/exploits/46502/	Exploit Third Party Advisory VDB Entry
29	https://usn.ubuntu.com/3933-2/	Third Party Advisory
30	https://usn.ubuntu.com/3933-1/	Third Party Advisory
31	https://usn.ubuntu.com/3932-2/	Third Party Advisory
32	https://usn.ubuntu.com/3932-1/	Third Party Advisory
33	https://usn.ubuntu.com/3931-2/	Third Party Advisory
34	https://usn.ubuntu.com/3931-1/	Third Party Advisory
35	https://usn.ubuntu.com/3930-2/	Third Party Advisory
36	https://usn.ubuntu.com/3930-1/	Third Party Advisory
37	https://lists.debian.org/debian-lts-announce/2019/05/msg00002.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://lists.debian.org/debian-lts-announce/2019/03/msg00034.html	Mailing List Third Party Advisory
40	https://github.com/torvalds/linux/commit/0a1d52994d440e21def1c2174932410b4f2a98a1	Mailing List Patch Vendor Advisory
41	https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.162	Mailing List Patch Vendor Advisory
42	https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.14	Mailing List Patch Vendor Advisory
43	https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.27	Mailing List Patch Vendor Advisory
44	https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.105	Mailing List Patch Vendor Advisory
45	https://bugs.chromium.org/p/project-zero/issues/detail?id=1792	Exploit Mailing List Third Party Advisory
46	https://access.redhat.com/errata/RHSA-2019:1480	Third Party Advisory
47	https://access.redhat.com/errata/RHSA-2019:1479	Third Party Advisory
48	https://access.redhat.com/errata/RHSA-2019:0831	Third Party Advisory
49	http://www.securityfocus.com/bid/107296	Third Party Advisory VDB Entry
50	http://packetstormsecurity.com/files/156053/Reliable-Datagram-Sockets-RDS-rds_atomic_free_op-Privilege-Escalation.html	Exploit Third Party Advisory VDB Entry
51	http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00052.html	Mailing List Third Party Advisory
52	http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00045.html	Mailing List Third Party Advisory

Common Vulnerabilities List

No	CWE	Name	URL
1	CWE-476	NULL ポインタデリファレンス	https://cwe.mitre.org/data/definitions/476.html

JVN Vulnerability Information

Linux Kernel における NULL ポインタデリファレンスに関する脆弱性

Title	Linux Kernel における NULL ポインタデリファレンスに関する脆弱性
Summary	Linux Kernel には、NULL ポインタデリファレンスに関する脆弱性が存在します。
Possible impacts	サービス運用妨害 (DoS) 状態に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 5, 2019, midnight
Registration Date	April 4, 2019, 2:03 p.m.
Last Update	April 4, 2019, 2:03 p.m.

Affected System

Debian

Debian GNU/Linux

Linux

Linux Kernel 4.20.14 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-2019-9213	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9213
2	CVE-2019-9213	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9213
National Vulnerability Database (NVD)
3	CVE-2019-9213	https://nvd.nist.gov/vuln/detail/CVE-2019-9213
4	CVE-2019-9213	https://nvd.nist.gov/vuln/detail/CVE-2019-9213

CWE (共通脆弱性タイプ一覧)

No	Name	URL
JVNDB
1	CWE-476	http://cwe.mitre.org/data/definitions/476.html
2	CWE-476	http://cwe.mitre.org/data/definitions/476.html

ベンダー情報

No	Name	URL
ChangeLog
1	ChangeLog-4.14.105	https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.105
2	ChangeLog-4.14.105	https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.105
3	ChangeLog-4.19.27	https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.27
4	ChangeLog-4.19.27	https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.27
5	ChangeLog-4.20.14	https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.14
6	ChangeLog-4.20.14	https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.14
7	ChangeLog-4.9.162	https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.162
8	ChangeLog-4.9.162	https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.162
Debian Security Advisory
9	[SECURITY] [DLA 1731-1] linux security update	https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html
10	[SECURITY] [DLA 1731-1] linux security update	https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html
11	[SECURITY] [DLA 1731-2] linux regression update	https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html
12	[SECURITY] [DLA 1731-2] linux regression update	https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html
GitHub
13	mm: enforce min addr even if capable() in expand_downwards()	https://github.com/torvalds/linux/commit/0a1d52994d440e21def1c2174932410b4f2a98a1
14	mm: enforce min addr even if capable() in expand_downwards()	https://github.com/torvalds/linux/commit/0a1d52994d440e21def1c2174932410b4f2a98a1
Linux Kernel
15	Linux Kernel Archives	http://www.kernel.org
16	Linux Kernel Archives	http://www.kernel.org
Linux kernel source tree
17	mm: enforce min addr even if capable() in expand_downwards()	http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0a1d52994d440e21def1c2174932410b4f2a98a1
18	mm: enforce min addr even if capable() in expand_downwards()	http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0a1d52994d440e21def1c2174932410b4f2a98a1

Change Log

No	Changed Details	Date of change
1	[2019年04月04日] 掲載	April 4, 2019, 2:03 p.m.
1	[2019年04月04日] 掲載	April 4, 2019, 2:03 p.m.