CVE-2016-6888

Qemu: net: vmxnet: integer overflow in packet initialisation

Severity Score

4.4

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Integer overflow in the net_tx_pkt_init function in hw/net/net_tx_pkt.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (QEMU process crash) via the maximum fragmentation count, which triggers an unchecked multiplication and NULL pointer dereference.

Desbordamiento de entero en la función net_tx_pkt_enit en hw/net/net_tx_pkt.c en QEMU (también conocido como Quick Emulator) permite a administradores locales del SO invitado provocar una denegación de servicio (caída del proceso QEMU) a través del conteo máximo de fragmentación, lo que desencadena una multiplicación no comprobada y referencia a un puntero NULL.

*Credits: N/A

CVSS Scores

Attack Vector

Local

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

Attack Vector

Adjacent

Attack Complexity

Medium

Authentication

Single

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2016-08-19 CVE Reserved
2016-09-26 CVE Published
2023-03-08 EPSS Updated
2024-08-06 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-190: Integer Overflow or Wraparound
CWE-476: NULL Pointer Dereference

CAPEC

References (11)

URL	Tag	Source
http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=47882fa4975bf0b58dd74474329fdd7154e8f04c	X_refsource_confirm
http://www.openwall.com/lists/oss-security/2016/08/19/10	Mailing List
http://www.openwall.com/lists/oss-security/2016/08/19/6	Mailing List
http://www.securityfocus.com/bid/92556	Third Party Advisory
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/2016-08/msg03176.html	2023-11-07

URL	Date	SRC
https://access.redhat.com/errata/RHSA-2017:2392	2023-11-07
https://access.redhat.com/errata/RHSA-2017:2408	2023-11-07
https://security.gentoo.org/glsa/201609-01	2023-11-07
https://access.redhat.com/security/cve/CVE-2016-6888	2017-08-01
https://bugzilla.redhat.com/show_bug.cgi?id=1369031	2017-08-01

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Redhat Search vendor "Redhat"	Virtualization Search vendor "Redhat" for product "Virtualization"	4.0 Search vendor "Redhat" for product "Virtualization" and version "4.0"	-	Affected	in	Redhat Search vendor "Redhat"	Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"	7.0 Search vendor "Redhat" for product "Enterprise Linux" and version "7.0"	-	Safe
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
Qemu Search vendor "Qemu"		Qemu Search vendor "Qemu" for product "Qemu"				2.7.0 Search vendor "Qemu" for product "Qemu" and version "2.7.0"		rc0		Affected
Qemu Search vendor "Qemu"		Qemu Search vendor "Qemu" for product "Qemu"				2.7.0 Search vendor "Qemu" for product "Qemu" and version "2.7.0"		rc1		Affected
Qemu Search vendor "Qemu"		Qemu Search vendor "Qemu" for product "Qemu"				2.7.0 Search vendor "Qemu" for product "Qemu" and version "2.7.0"		rc2		Affected
Qemu Search vendor "Qemu"		Qemu Search vendor "Qemu" for product "Qemu"				2.7.0 Search vendor "Qemu" for product "Qemu" and version "2.7.0"		rc3		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
Redhat Search vendor "Redhat"		Openstack Search vendor "Redhat" for product "Openstack"				6.0 Search vendor "Redhat" for product "Openstack" and version "6.0"		-		Affected
Redhat Search vendor "Redhat"		Openstack Search vendor "Redhat" for product "Openstack"				7.0 Search vendor "Redhat" for product "Openstack" and version "7.0"		-		Affected
Redhat Search vendor "Redhat"		Openstack Search vendor "Redhat" for product "Openstack"				8 Search vendor "Redhat" for product "Openstack" and version "8"		-		Affected
Redhat Search vendor "Redhat"		Openstack Search vendor "Redhat" for product "Openstack"				9 Search vendor "Redhat" for product "Openstack" and version "9"		-		Affected
Redhat Search vendor "Redhat"		Openstack Search vendor "Redhat" for product "Openstack"				10 Search vendor "Redhat" for product "Openstack" and version "10"		-		Affected
Redhat Search vendor "Redhat"		Openstack Search vendor "Redhat" for product "Openstack"				11 Search vendor "Redhat" for product "Openstack" and version "11"		-		Affected