CVE-2016-1886

FreeBSD Kernel (FreeBSD 10.2 < 10.3 x64) - 'SETFKEY' (PoC)

Severity Score

7.8

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Integer signedness error in the genkbd_commonioctl function in sys/dev/kbd/kbd.c in FreeBSD 9.3 before p42, 10.1 before p34, 10.2 before p17, and 10.3 before p3 allows local users to obtain sensitive information from kernel memory, cause a denial of service (memory overwrite and kernel crash), or gain privileges via a negative value in the flen structure member in the arg argument in a SETFKEY ioctl call, which triggers a "two way heap and stack overflow."

Error de entero sin signo en la función genkbd_commonioctl en sys/dev/kbd/kbd.c en FreeBSD 9.3 en versiones anteriores a p42, 10.1 en versiones anteriores a p34, 10.2 en versiones anteriores a p17 y 10.3 en versiones anteriores a p3 permite a usuarios locales obtener información sensible de la memoria del kernel, causar una denegación de servicio (sobrescribir memoria y caída del kernel), u obtener privilegios a través de un valor negativo en el mimebro de estructura flen en el argumento arg en una llamada SETFKEY ioctl, lo que desencadena un "desbordamiento de pila y memoria dinámica en dos sentidos"

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2016-01-13 CVE Reserved
2016-05-18 CVE Published
2016-05-29 First Exploit
2023-03-08 EPSS Updated
2024-08-05 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer

CAPEC

References (6)

URL	Tag	Source
http://www.securityfocus.com/bid/90734	Vdb Entry
http://www.securitytracker.com/id/1035905	Vdb Entry

URL	Date	SRC
https://www.exploit-db.com/exploits/44211	2016-05-29
http://cturt.github.io/SETFKEY.html	2024-08-05

URL	Date	SRC
https://security.FreeBSD.org/patches/SA-16:18/atkbd.patch	2017-04-20

URL	Date	SRC
https://www.freebsd.org/security/advisories/FreeBSD-SA-16:18.atkbd.asc	2017-04-20

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				9.3 Search vendor "Freebsd" for product "Freebsd" and version "9.3"		-		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				10.1 Search vendor "Freebsd" for product "Freebsd" and version "10.1"		-		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				10.2 Search vendor "Freebsd" for product "Freebsd" and version "10.2"		-		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				10.3 Search vendor "Freebsd" for product "Freebsd" and version "10.3"		-		Affected