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JVN脆弱性詳細

Linux Kernel の net/netlink/af_netlink.c の netlink_dump 関数におけるサービス運用妨害 (DoS) の脆弱性

Title	Linux Kernel の net/netlink/af_netlink.c の netlink_dump 関数におけるサービス運用妨害 (DoS) の脆弱性
Summary	Linux Kernel の net/netlink/af_netlink.c の netlink_dump 関数には、競合状態により、サービス運用妨害 (二重解放) 状態にされるなど、不特定の影響を受ける脆弱性が存在します。
Possible impacts	ローカルユーザにより、sendmsg システムコールを生成する巧妙に細工されたアプリケーションを介して、予期されるよりも早く開始された新しいダンプに関連する解放操作を引き起こされることで、サービス運用妨害 (二重解放) 状態にされるなど、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	June 24, 2016, midnight
Registration Date	Jan. 11, 2017, 3:44 p.m.
Last Update	Jan. 11, 2017, 3:44 p.m.

CVSS3.0 : 重要
Score	7.8
Vector	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS2.0 : 危険
Score	7.2
Vector	AV:L/AC:L/Au:N/C:C/I:C/A:C

Affected System

Linux

Linux Kernel 4.6.3 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-2016-9806	http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-9806
National Vulnerability Database (NVD)
2	CVE-2016-9806	http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-9806

CWE (共通脆弱性タイプ一覧)

No	Name	URL
JVNDB
1	CWE-362	https://jvndb.jvn.jp/ja/cwe/CWE-362.html
2	CWE-415	https://cwe.mitre.org/data/definitions/415.html

ベンダー情報

No	Name	URL
ChangeLog
1	ChangeLog-4.6.3	https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.6.3
GitHub
2	netlink: Fix dump skb leak/double free	https://github.com/torvalds/linux/commit/92964c79b357efd980812c4de5c1fd2ec8bb5520
Linux Kernel
3	Linux Kernel Archives	http://www.kernel.org
Linux kernel source tree
4	netlink: Fix dump skb leak/double free	http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=92964c79b357efd980812c4de5c1fd2ec8bb5520
Red Hat Bugzilla
5	Bug 1401502	https://bugzilla.redhat.com/show_bug.cgi?id=1401502

Change Log

No	Changed Details	Date of change
0	[2017年01月11日] 掲載	Feb. 17, 2018, 10:37 a.m.

NVD Vulnerability Information

CVE-2016-9806

Summary	Race condition in the netlink_dump function in net/netlink/af_netlink.c in the Linux kernel before 4.6.3 allows local users to cause a denial of service (double free) or possibly have unspecified other impact via a crafted application that makes sendmsg system calls, leading to a free operation associated with a new dump that started earlier than anticipated.
Publication Date	Dec. 28, 2016, 4:59 p.m.
Registration Date	Jan. 26, 2021, 2:20 p.m.
Last Update	Nov. 21, 2024, 12:01 p.m.

Affected software configurations

Configuration1	or higher	or less	more than	less than
cpe:2.3:o:linux:linux_kernel::::::::	3.17			3.18.37
cpe:2.3:o:linux:linux_kernel::::::::	3.19			4.1.28
cpe:2.3:o:linux:linux_kernel::::::::	4.5			4.6.3
cpe:2.3:o:linux:linux_kernel::::::::	4.2			4.4.14
cpe:2.3:o:linux:linux_kernel::::::::	3.15			3.16.37
cpe:2.3:o:linux:linux_kernel::::::::	3.13			3.14.73
cpe:2.3:o:linux:linux_kernel::::::::	3.12			3.12.62

Related information, measures and tools

No	URL	タグ
1	http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=92964c79b357efd980812c4de5c1fd2ec8bb5520	Patch Vendor Advisory
2	http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=92964c79b357efd980812c4de5c1fd2ec8bb5520	Patch Vendor Advisory
3	http://lists.openwall.net/netdev/2016/05/15/69	Mailing List Third Party Advisory
4	http://lists.openwall.net/netdev/2016/05/15/69	Mailing List Third Party Advisory
5	http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.6.3	Release Notes Vendor Advisory
6	http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.6.3	Release Notes Vendor Advisory
7	http://www.openwall.com/lists/oss-security/2016/12/03/4	Mailing List Patch Third Party Advisory
8	http://www.openwall.com/lists/oss-security/2016/12/03/4	Mailing List Patch Third Party Advisory
9	http://www.securityfocus.com/bid/94653	Third Party Advisory VDB Entry
10	http://www.securityfocus.com/bid/94653	Third Party Advisory VDB Entry
11	http://www.securitytracker.com/id/1037968	Third Party Advisory VDB Entry
12	http://www.securitytracker.com/id/1037968	Third Party Advisory VDB Entry
13	https://access.redhat.com/errata/RHSA-2017:1842	Third Party Advisory
14	https://access.redhat.com/errata/RHSA-2017:1842	Third Party Advisory
15	https://access.redhat.com/errata/RHSA-2017:2077	Third Party Advisory
16	https://access.redhat.com/errata/RHSA-2017:2077	Third Party Advisory
17	https://access.redhat.com/errata/RHSA-2017:2669	Third Party Advisory
18	https://access.redhat.com/errata/RHSA-2017:2669	Third Party Advisory
19	https://bugzilla.redhat.com/show_bug.cgi?id=1401502	Issue Tracking Patch
20	https://bugzilla.redhat.com/show_bug.cgi?id=1401502	Issue Tracking Patch
21	https://github.com/torvalds/linux/commit/92964c79b357efd980812c4de5c1fd2ec8bb5520	Patch Third Party Advisory
22	https://github.com/torvalds/linux/commit/92964c79b357efd980812c4de5c1fd2ec8bb5520	Patch Third Party Advisory
23	https://source.android.com/security/bulletin/2017-03-01.html	Third Party Advisory
24	https://source.android.com/security/bulletin/2017-03-01.html	Third Party Advisory

Common Vulnerabilities List

No	CWE	Name	URL
1	CWE-362	競合状態	https://cwe.mitre.org/data/definitions/362.html
2	CWE-415	二重解放	https://cwe.mitre.org/data/definitions/415.html