CVE-2016-4952

Ubuntu Security Notice USN-3047-1

Severity Score

6.0

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

QEMU (aka Quick Emulator), when built with VMWARE PVSCSI paravirtual SCSI bus emulation support, allows local guest OS administrators to cause a denial of service (out-of-bounds array access) via vectors related to the (1) PVSCSI_CMD_SETUP_RINGS or (2) PVSCSI_CMD_SETUP_MSG_RING SCSI command.

QEMU (también conocido como Quick Emulator), cuando está construido con soporte de emulación bus VMWARE PVSCSI paravirtual SCSI, permite a administradores locales del SO invitado provocar una denegación de servicio (acceso al array fuera de rango) a través de vectores relacionados con el comando (1) PVSCSI_CMD_SETUP_RINGS o (2) PVSCSI_CMD_SETUP_MSG_RING SCSI.

Li Qiang discovered that QEMU incorrectly handled 53C9X Fast SCSI controller emulation. A privileged attacker inside the guest could use th is issue to cause QEMU to crash, resulting in a denial of service, or possibly execute arbitrary code on the host. In the default installation, when QEMU is used with libvirt, attackers would be isolated by the libvirt AppArmor Various other issues were also addressed.

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Local

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2016-05-23 CVE Reserved
2016-08-05 CVE Published
2024-08-06 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-787: Out-of-bounds Write

CAPEC

References (7)

URL	Tag	Source
http://www.openwall.com/lists/oss-security/2016/05/23/1	Mailing List
http://www.openwall.com/lists/oss-security/2016/05/23/4	Mailing List
https://bugzilla.redhat.com/show_bug.cgi?id=1334384	Issue Tracking
https://lists.debian.org/debian-lts-announce/2018/11/msg00038.html	Mailing List

URL	Date	SRC

URL	Date	SRC
https://lists.gnu.org/archive/html/qemu-devel/2016-05/msg03774.html	2020-10-21

URL	Date	SRC
http://www.ubuntu.com/usn/USN-3047-1	2020-10-21
http://www.ubuntu.com/usn/USN-3047-2	2020-10-21

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Qemu Search vendor "Qemu"		Qemu Search vendor "Qemu" for product "Qemu"				<= 2.6.2 Search vendor "Qemu" for product "Qemu" and version " <= 2.6.2"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				12.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "12.04"		esm		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				14.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "14.04"		esm		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				16.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "16.04"		lts		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				8.0 Search vendor "Debian" for product "Debian Linux" and version "8.0"		-		Affected