NVD Vulnerability Detail

CVE-2016-1922

Summary	QEMU (aka Quick Emulator) built with the TPR optimization for 32-bit Windows guests support is vulnerable to a null pointer dereference flaw. It occurs while doing I/O port write operations via hmp interface. In that, 'current_cpu' remains null, which leads to the null pointer dereference. A user or process could use this flaw to crash the QEMU instance, resulting in DoS issue.
Publication Date	Dec. 30, 2016, 7:59 a.m.
Registration Date	Jan. 26, 2021, 2:08 p.m.
Last Update	Nov. 21, 2024, 11:47 a.m.

Affected software configurations

Configuration1		or higher	or less	more than	less than
cpe:2.3:a:qemu:qemu::::::::			2.5.1.1

Related information, measures and tools

No	URL	タグ
1	http://www.debian.org/security/2016/dsa-3469	Third Party Advisory
2	http://www.debian.org/security/2016/dsa-3469	Third Party Advisory
3	http://www.debian.org/security/2016/dsa-3470	Third Party Advisory
4	http://www.debian.org/security/2016/dsa-3470	Third Party Advisory
5	http://www.debian.org/security/2016/dsa-3471	Third Party Advisory
6	http://www.debian.org/security/2016/dsa-3471	Third Party Advisory
7	http://www.openwall.com/lists/oss-security/2016/01/16/1	Mailing List Third Party Advisory
8	http://www.openwall.com/lists/oss-security/2016/01/16/1	Mailing List Third Party Advisory
9	http://www.openwall.com/lists/oss-security/2016/01/16/6	Mailing List Third Party Advisory
10	http://www.openwall.com/lists/oss-security/2016/01/16/6	Mailing List Third Party Advisory
11	http://www.securityfocus.com/bid/81058	Third Party Advisory VDB Entry
12	http://www.securityfocus.com/bid/81058	Third Party Advisory VDB Entry
13	https://bugzilla.redhat.com/show_bug.cgi?id=1283934	Issue Tracking Third Party Advisory
14	https://bugzilla.redhat.com/show_bug.cgi?id=1283934	Issue Tracking Third Party Advisory
15	https://lists.gnu.org/archive/html/qemu-devel/2016-01/msg02812.html	Patch Vendor Advisory
16	https://lists.gnu.org/archive/html/qemu-devel/2016-01/msg02812.html	Patch Vendor Advisory
17	https://security.gentoo.org/glsa/201604-01	Third Party Advisory
18	https://security.gentoo.org/glsa/201604-01	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

32-bit Windows ゲストサポート用に TPR 最適化でビルドされた QEMU におけるサービス運用妨害 (DoS) の脆弱性

Title	32-bit Windows ゲストサポート用に TPR 最適化でビルドされた QEMU におけるサービス運用妨害 (DoS) の脆弱性
Summary	32-bit Windows ゲストサポート用に TPR 最適化でビルドされた QEMU (別名 Quick Emulator) は、I/O port の書き込みオペレーションの際、'current_cpu' が NULL のままであるため、サービス運用妨害 (NULL ポインタデリファレンス) 状態にされる脆弱性が存在します。
Possible impacts	ユーザまたはプロセスにより、hmp インターフェースを介して、QEMU インスタンスのクラッシュを引き起こされることで、サービス運用妨害 (NULL ポインタデリファレンス) 状態にされる可能性があります。
Solution	ベンダ情報および参考情報を参照して適切な対策を実施してください。
Publication Date	Jan. 15, 2016, midnight
Registration Date	Jan. 12, 2017, 3:33 p.m.
Last Update	Jan. 12, 2017, 3:33 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-2016-1922	http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1922
National Vulnerability Database (NVD)
2	CVE-2016-1922	http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-1922

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-devel
1	[PULL] i386: avoid null pointer dereference	https://lists.gnu.org/archive/html/qemu-devel/2016-01/msg02812.html
Red Hat Bugzilla
2	Bug 1283934	https://bugzilla.redhat.com/show_bug.cgi?id=1283934

Change Log

No	Changed Details	Date of change
0	[2017年01月12日] 掲載	Feb. 17, 2018, 10:37 a.m.