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JVN脆弱性詳細

QEMU の hw/virtio/virtio.c の virtqueue_map_desc 関数におけるサービス運用妨害 (DoS) の脆弱性

Title	QEMU の hw/virtio/virtio.c の virtqueue_map_desc 関数におけるサービス運用妨害 (DoS) の脆弱性
Summary	QEMU (別名 Quick Emulator) の hw/virtio/virtio.c の virtqueue_map_desc 関数には、サービス運用妨害 (NULL ポインタデリファレンスおよび QEMU プロセスクラッシュ) 状態にされる脆弱性が存在します。
Possible impacts	ローカルのゲスト OS 管理者により、過度に大きい I/O 記述子のバッファ長の値を介して、サービス運用妨害 (NULL ポインタデリファレンスおよび QEMU プロセスクラッシュ) 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	Sept. 15, 2016, midnight
Registration Date	Dec. 13, 2016, 4:01 p.m.
Last Update	Dec. 13, 2016, 4:01 p.m.

Affected System

Fabrice Bellard

QEMU

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-2016-7422	http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-7422
National Vulnerability Database (NVD)
2	CVE-2016-7422	http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-7422

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

ベンダー情報

No	Name	URL
QEMU
1	virtio: add check for descriptor's mapped address	http://git.qemu.org/?p=qemu.git;a=commit;h=973e7170dddefb491a48df5cba33b2ae151013a0
Qemu-devel
2	[PATCH] virtio: add check for descriptor's mapped address	https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg03546.html

Change Log

No	Changed Details	Date of change
0	[2016年12月13日] 掲載	Feb. 17, 2018, 10:37 a.m.

NVD Vulnerability Information

CVE-2016-7422

Summary	The virtqueue_map_desc function in hw/virtio/virtio.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (NULL pointer dereference and QEMU process crash) via a large I/O descriptor buffer length value.
Publication Date	Dec. 10, 2016, 9:59 a.m.
Registration Date	Jan. 26, 2021, 2:17 p.m.
Last Update	Nov. 21, 2024, 11:57 a.m.

Affected software configurations

Configuration1		or higher	or less	more than	less than
cpe:2.3:a:qemu:qemu::::::::			2.7.1

Configuration2		or higher	or less	more than	less than
cpe:2.3:o:opensuse:leap:42.2:::::::*

Configuration4		or higher	or less	more than	less than
cpe:2.3:a:redhat:virtualization:4.0:::::::*
execution environment
1	cpe:2.3:o:redhat:enterprise_linux:7.0:::::::*

Related information, measures and tools

No	URL	タグ
1	http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=973e7170dddefb491a48df5cba33b2ae151013a0
2	http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=973e7170dddefb491a48df5cba33b2ae151013a0
3	http://lists.opensuse.org/opensuse-updates/2016-12/msg00140.html	Mailing List Third Party Advisory
4	http://lists.opensuse.org/opensuse-updates/2016-12/msg00140.html	Mailing List Third Party Advisory
5	http://www.openwall.com/lists/oss-security/2016/09/16/10	Mailing List Third Party Advisory
6	http://www.openwall.com/lists/oss-security/2016/09/16/10	Mailing List Third Party Advisory
7	http://www.openwall.com/lists/oss-security/2016/09/16/4	Mailing List Third Party Advisory
8	http://www.openwall.com/lists/oss-security/2016/09/16/4	Mailing List Third Party Advisory
9	http://www.securityfocus.com/bid/92996	Third Party Advisory VDB Entry
10	http://www.securityfocus.com/bid/92996	Third Party Advisory VDB Entry
11	https://access.redhat.com/errata/RHSA-2017:2392	Third Party Advisory
12	https://access.redhat.com/errata/RHSA-2017:2392	Third Party Advisory
13	https://access.redhat.com/errata/RHSA-2017:2408	Third Party Advisory
14	https://access.redhat.com/errata/RHSA-2017:2408	Third Party Advisory
15	https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg03546.html	Patch Third Party Advisory
16	https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg03546.html	Patch Third Party Advisory
17	https://security.gentoo.org/glsa/201609-01	Third Party Advisory
18	https://security.gentoo.org/glsa/201609-01	Third Party Advisory

Common Vulnerabilities List

No	CWE	Name	URL
1	CWE-120	古典的バッファオーバーフロー	https://cwe.mitre.org/data/definitions/120.html