NVD Vulnerability Detail

CVE-2016-6833

Summary	Use-after-free vulnerability in the vmxnet3_io_bar0_write function in hw/net/vmxnet3.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (QEMU instance crash) by leveraging failure to check if the device is active.
Publication Date	Dec. 10, 2016, 9:59 a.m.
Registration Date	Jan. 26, 2021, 2:16 p.m.
Last Update	Nov. 21, 2024, 11:56 a.m.

Affected software configurations

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

Related information, measures and tools

No	URL	タグ
1	http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=6c352ca9b4ee3e1e286ea9e8434bd8e69ac7d0d8
2	http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=6c352ca9b4ee3e1e286ea9e8434bd8e69ac7d0d8
3	http://www.openwall.com/lists/oss-security/2016/08/12/1	Mailing List Third Party Advisory
4	http://www.openwall.com/lists/oss-security/2016/08/12/1	Mailing List Third Party Advisory
5	http://www.openwall.com/lists/oss-security/2016/08/18/3	Mailing List Third Party Advisory
6	http://www.openwall.com/lists/oss-security/2016/08/18/3	Mailing List Third Party Advisory
7	http://www.securityfocus.com/bid/93255	Third Party Advisory VDB Entry
8	http://www.securityfocus.com/bid/93255	Third Party Advisory VDB Entry
9	https://lists.debian.org/debian-lts-announce/2018/09/msg00007.html	Mailing List Third Party Advisory
10	https://lists.debian.org/debian-lts-announce/2018/09/msg00007.html	Mailing List Third Party Advisory
11	https://lists.gnu.org/archive/html/qemu-devel/2016-08/msg01602.html	Mailing List Patch Third Party Advisory
12	https://lists.gnu.org/archive/html/qemu-devel/2016-08/msg01602.html	Mailing List Patch Third Party Advisory
13	https://security.gentoo.org/glsa/201609-01	Third Party Advisory
14	https://security.gentoo.org/glsa/201609-01	Third Party Advisory

Common Vulnerabilities List

No	CWE	Name	URL
1	CWE-416	解放済みメモリの使用	https://cwe.mitre.org/data/definitions/416.html

JVN Vulnerability Information

QEMU の hw/net/vmxnet3.c の vmxnet3_io_bar0_write 関数におけるサービス運用妨害 (DoS) の脆弱性

Title	QEMU の hw/net/vmxnet3.c の vmxnet3_io_bar0_write 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/net/vmxnet3.c の vmxnet3_io_bar0_write 関数には、解放済みメモリの使用 (Use-after-free) により、サービス運用妨害 (QEMU インスタンスのクラッシュ) 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、デバイスがアクティブかどうかのチェックの失敗を利用されることで、サービス運用妨害 (QEMU インスタンスのクラッシュ) 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	Aug. 9, 2016, midnight
Registration Date	Dec. 13, 2016, 4 p.m.
Last Update	Dec. 13, 2016, 4 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-2016-6833	http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-6833
National Vulnerability Database (NVD)
2	CVE-2016-6833	http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-6833

CWE (共通脆弱性タイプ一覧)

No	Name	URL
JVNDB
1	CWE-416	https://cwe.mitre.org/data/definitions/416.html

ベンダー情報

No	Name	URL
QEMU
1	net: vmxnet3: check for device_active before write	http://git.qemu.org/?p=qemu.git;a=commit;h=6c352ca9b4ee3e1e286ea9e8434bd8e69ac7d0d8
Qemu-devel
2	[PULL 2/3] net: vmxnet3: check for device_active before write	https://lists.gnu.org/archive/html/qemu-devel/2016-08/msg01602.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.