CVE-2016-1755

Apple Mac OSX Kernel - AppleKeyStore Use-After-Free

Severity Score

7.8

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The kernel in Apple iOS before 9.3, OS X before 10.11.4, tvOS before 9.2, and watchOS before 2.2 allows attackers to execute arbitrary code in a privileged context or cause a denial of service (memory corruption) via a crafted app, a different vulnerability than CVE-2016-1754.

El kernel en Apple iOS en versiones anteriores a 9.3, OS X en versiones anteriores a 10.11.4, tvOS en versiones anteriores a 9.2 y watchOS en versiones anteriores a 2.2 permite a atacantes ejecutar código arbitrario en un contexto privilegiado o causar una denegación de servicio (corrupción de memoria) a través de una app manipulada, una vulnerabilidad diferente a CVE-2016-1754.

The AppleKeyStore userclient uses an IOCommandGate to serialize access to its userclient methods, however by racing two threads, one of which closes the userclient (which frees the IOCommandGate) and one of which tries to make an external method call we can cause a use-after-free of the IOCommandGate.

*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

2016-01-13 CVE Reserved
2016-03-22 CVE Published
2024-08-05 CVE Updated
2024-08-05 First Exploit
2025-01-12 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

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

CAPEC

References (10)

URL	Tag	Source
http://www.securitytracker.com/id/1035353	Third Party Advisory

URL	Date	SRC
https://www.exploit-db.com/exploits/39614	2024-08-05

URL	Date	SRC

URL	Date	SRC
http://lists.apple.com/archives/security-announce/2016/Mar/msg00000.html	2019-03-25
http://lists.apple.com/archives/security-announce/2016/Mar/msg00001.html	2019-03-25
http://lists.apple.com/archives/security-announce/2016/Mar/msg00002.html	2019-03-25
http://lists.apple.com/archives/security-announce/2016/Mar/msg00004.html	2019-03-25
https://support.apple.com/HT206166	2019-03-25
https://support.apple.com/HT206167	2019-03-25
https://support.apple.com/HT206168	2019-03-25
https://support.apple.com/HT206169	2019-03-25

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Apple Search vendor "Apple"		Iphone Os Search vendor "Apple" for product "Iphone Os"				< 9.3 Search vendor "Apple" for product "Iphone Os" and version " < 9.3"		-		Affected
Apple Search vendor "Apple"		Mac Os X Search vendor "Apple" for product "Mac Os X"				< 10.11.4 Search vendor "Apple" for product "Mac Os X" and version " < 10.11.4"		-		Affected
Apple Search vendor "Apple"		Tvos Search vendor "Apple" for product "Tvos"				< 9.2 Search vendor "Apple" for product "Tvos" and version " < 9.2"		-		Affected
Apple Search vendor "Apple"		Watchos Search vendor "Apple" for product "Watchos"				< 2.2 Search vendor "Apple" for product "Watchos" and version " < 2.2"		-		Affected