NVD Vulnerability Detail

CVE-2016-9794

Summary	Race condition in the snd_pcm_period_elapsed function in sound/core/pcm_lib.c in the ALSA subsystem in the Linux kernel before 4.7 allows local users to cause a denial of service (use-after-free) or possibly have unspecified other impact via a crafted SNDRV_PCM_TRIGGER_START command.
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.

CVSS3.1 : HIGH
スコア	7.8
Vector	CVSS:3.1/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 : HIGH
Score	7.2
Vector	AV:L/AC:L/Au:N/C:C/I:C/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)	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::::::::	3.3			3.10.105
cpe:2.3:o:linux:linux_kernel::::::::	3.13			3.16.40
cpe:2.3:o:linux:linux_kernel::::::::				3.2.85
cpe:2.3:o:linux:linux_kernel::::::::	3.17			3.18.52
cpe:2.3:o:linux:linux_kernel::::::::	4.5			4.7
cpe:2.3:o:linux:linux_kernel::::::::	3.11			3.12.69
cpe:2.3:o:linux:linux_kernel::::::::	3.19			4.4.37

Related information, measures and tools

No	URL	タグ
1	http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=3aa02cb664c5fb1042958c8d1aa8c35055a2ebc4	Patch Vendor Advisory
2	http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=3aa02cb664c5fb1042958c8d1aa8c35055a2ebc4	Patch Vendor Advisory
3	http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00057.html	Third Party Advisory
4	http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00057.html	Third Party Advisory
5	http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00062.html	Third Party Advisory
6	http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00062.html	Third Party Advisory
7	http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00072.html	Third Party Advisory
8	http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00072.html	Third Party Advisory
9	http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00075.html	Third Party Advisory
10	http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00075.html	Third Party Advisory
11	http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00081.html	Third Party Advisory
12	http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00081.html	Third Party Advisory
13	http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00088.html	Third Party Advisory
14	http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00088.html	Third Party Advisory
15	http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00091.html	Third Party Advisory
16	http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00091.html	Third Party Advisory
17	http://rhn.redhat.com/errata/RHSA-2016-2574.html	Third Party Advisory
18	http://rhn.redhat.com/errata/RHSA-2016-2574.html	Third Party Advisory
19	http://www.openwall.com/lists/oss-security/2016/12/03/2	Mailing List Patch
20	http://www.openwall.com/lists/oss-security/2016/12/03/2	Mailing List Patch
21	http://www.securityfocus.com/bid/94654	Third Party Advisory VDB Entry
22	http://www.securityfocus.com/bid/94654	Third Party Advisory VDB Entry
23	https://bugzilla.redhat.com/show_bug.cgi?id=1401494	Issue Tracking
24	https://bugzilla.redhat.com/show_bug.cgi?id=1401494	Issue Tracking
25	https://github.com/torvalds/linux/commit/3aa02cb664c5fb1042958c8d1aa8c35055a2ebc4	Patch Vendor Advisory
26	https://github.com/torvalds/linux/commit/3aa02cb664c5fb1042958c8d1aa8c35055a2ebc4	Patch Vendor Advisory
27	https://patchwork.kernel.org/patch/8752621/	Issue Tracking
28	https://patchwork.kernel.org/patch/8752621/	Issue Tracking
29	https://source.android.com/security/bulletin/2017-05-01	Third Party Advisory
30	https://source.android.com/security/bulletin/2017-05-01	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-416	解放済みメモリの使用	https://cwe.mitre.org/data/definitions/416.html

JVN Vulnerability Information

Linux Kernel の ALSA サブシステムの sound/core/pcm_lib.c におけるサービス運用妨害 (DoS) の脆弱性

Title	Linux Kernel の ALSA サブシステムの sound/core/pcm_lib.c におけるサービス運用妨害 (DoS) の脆弱性
Summary	Linux Kernel の ALSA サブシステムの sound/core/pcm_lib.c の snd_pcm_period_elapsed 関数には、競合状態により、サービス運用妨害 (解放済みメモリの使用 (use-after-free)) 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、巧妙に細工された SNDRV_PCM_TRIGGER_START コマンドを介して、サービス運用妨害 (解放済みメモリの使用 (use-after-free)) 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	April 14, 2016, midnight
Registration Date	Jan. 11, 2017, 3:44 p.m.
Last Update	Jan. 11, 2017, 3:44 p.m.

Affected System

Linux

Linux Kernel 4.7 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-2016-9794	http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-9794
National Vulnerability Database (NVD)
2	CVE-2016-9794	http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-9794

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-416	https://cwe.mitre.org/data/definitions/416.html

ベンダー情報

No	Name	URL
GitHub
1	ALSA: pcm : Call kill_fasync() in stream lock	https://github.com/torvalds/linux/commit/3aa02cb664c5fb1042958c8d1aa8c35055a2ebc4
Linux Kernel
2	Linux Kernel Archives	http://www.kernel.org
Linux kernel source tree
3	ALSA: pcm : Call kill_fasync() in stream lock	http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=3aa02cb664c5fb1042958c8d1aa8c35055a2ebc4
Red Hat Bugzilla
4	Bug 1401494	https://bugzilla.redhat.com/show_bug.cgi?id=1401494

その他

No	Name	URL
関連文書
1	Patchwork Sound: BUG: KASAN: use-after-free in kill_fasync	https://patchwork.kernel.org/patch/8752621/

Change Log

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