CVE-2016-7907

Severity Score

4.4

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The imx_fec_do_tx function in hw/net/imx_fec.c in QEMU (aka Quick Emulator) does not properly limit the buffer descriptor count when transmitting packets, which allows local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) via vectors involving a buffer descriptor with a length of 0 and crafted values in bd.flags.

La función imx_fec_do_tx function in hw/net/imx_fec.c en QEMU (también conocido como Quick Emulator) no limita adecuadamente el recuento del descriptor de búfer cuando trasmite paquetes, lo que permite a administradores locales del SO invitado provocar una denegación de servicio (bucle infinito y caída del proceso QEMU) a través de vectores relacionados con un descriptor de búfer con una longitud de 0 y valores manipulados en bd.flags.

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2016-09-09 CVE Reserved
2016-10-05 CVE Published
2023-03-08 EPSS Updated
2024-08-06 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-20: Improper Input Validation
CWE-399: Resource Management Errors

CAPEC

References (6)

URL	Tag	Source
http://www.openwall.com/lists/oss-security/2016/10/03/1	Mailing List
http://www.openwall.com/lists/oss-security/2016/10/03/4	Mailing List
http://www.securityfocus.com/bid/93274	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg05556.html	2020-11-10

URL	Date	SRC
http://lists.opensuse.org/opensuse-updates/2016-12/msg00140.html	2020-11-10
https://security.gentoo.org/glsa/201611-11	2020-11-10

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"				<= 2.8.1.1 Search vendor "Qemu" for product "Qemu" and version " <= 2.8.1.1"		-		Affected
Qemu Search vendor "Qemu"		Qemu Search vendor "Qemu" for product "Qemu"				2.9.0 Search vendor "Qemu" for product "Qemu" and version "2.9.0"		rc0		Affected
Qemu Search vendor "Qemu"		Qemu Search vendor "Qemu" for product "Qemu"				2.9.0 Search vendor "Qemu" for product "Qemu" and version "2.9.0"		rc1		Affected
Qemu Search vendor "Qemu"		Qemu Search vendor "Qemu" for product "Qemu"				2.9.0 Search vendor "Qemu" for product "Qemu" and version "2.9.0"		rc2		Affected
Qemu Search vendor "Qemu"		Qemu Search vendor "Qemu" for product "Qemu"				2.9.0 Search vendor "Qemu" for product "Qemu" and version "2.9.0"		rc3		Affected
Qemu Search vendor "Qemu"		Qemu Search vendor "Qemu" for product "Qemu"				2.9.0 Search vendor "Qemu" for product "Qemu" and version "2.9.0"		rc4		Affected
Qemu Search vendor "Qemu"		Qemu Search vendor "Qemu" for product "Qemu"				2.9.0 Search vendor "Qemu" for product "Qemu" and version "2.9.0"		rc5		Affected