CVE-2016-9644

Severity Score

7.8

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The __get_user_asm_ex macro in arch/x86/include/asm/uaccess.h in the Linux kernel 4.4.22 through 4.4.28 contains extended asm statements that are incompatible with the exception table, which allows local users to obtain root access on non-SMEP platforms via a crafted application. NOTE: this vulnerability exists because of incorrect backporting of the CVE-2016-9178 patch to older kernels.

El macro __get_user_asm_ex en arch/x86/include/asm/uaccess.h en el kernel Linux 4.4.22 hasta la versión 4.4.28 contiene declaraciones asm extendidas que son incompatibles con la tabla de excepción, lo que permite a usuarios locales obtener acceso de root en plataformas non-SMEP a través de una aplicación manipulada. NOTA: esta vulnerabilidad existe debido a un incorrecto backporting del parche CVE-2016-9178 en kernels antiguos.

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2016-11-27 CVE Reserved
2016-11-28 CVE Published
2023-03-08 EPSS Updated
2024-08-06 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-264: Permissions, Privileges, and Access Controls

CAPEC

References (5)

URL	Tag	Source
http://www.openwall.com/lists/oss-security/2016/11/07/4	Mailing List
http://www.securityfocus.com/bid/94545	Vdb Entry
https://lwn.net/Articles/705220	Product

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
http://www.ubuntu.com/usn/USN-3146-1	2017-01-07
http://www.ubuntu.com/usn/USN-3146-2	2017-01-07

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				4.4.22 Search vendor "Linux" for product "Linux Kernel" and version "4.4.22"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				4.4.23 Search vendor "Linux" for product "Linux Kernel" and version "4.4.23"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				4.4.24 Search vendor "Linux" for product "Linux Kernel" and version "4.4.24"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				4.4.25 Search vendor "Linux" for product "Linux Kernel" and version "4.4.25"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				4.4.26 Search vendor "Linux" for product "Linux Kernel" and version "4.4.26"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				4.4.27 Search vendor "Linux" for product "Linux Kernel" and version "4.4.27"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				4.4.28 Search vendor "Linux" for product "Linux Kernel" and version "4.4.28"		-		Affected