CVE-2018-4442

WebKit JSC JIT - GetIndexedPropertyStorage Use-After-Free

Severity Score

8.8

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A memory corruption issue was addressed with improved memory handling. This issue affected versions prior to iOS 12.1.1, tvOS 12.1.1, watchOS 5.1.2, Safari 12.0.2, iTunes 12.9.2 for Windows, iCloud for Windows 7.9.

Un problema de corrupción de memoria se abordó con una gestión de memoria mejorada. El problema afectaba a iOS en versiones anteriores a la 12.1.1, tvOS en versiones anteriores a la 12.1.1, watchOS en versiones anteriores a la 5.1.2, Safari en versiones anteriores a la 12.0.2, iTunes para Windows en versiones anteriores a la 12.9.2 y iCloud para Windows en versiones anteriores a la 7.9.

The doesGC function simply takes a node, and tells if it might cause a garbage collection. This function is used to determine whether to insert write barriers. But it is missing some cases such as StringCharAt, StringCharCodeAt and GetByVal that might cause a garbage collection via rope strings. As a result, it can lead to a use-after-free condition.

*Credits: N/A

Attack Vector

Network

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

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2018-01-02 CVE Reserved
2018-12-06 CVE Published
2019-01-16 First Exploit
2024-08-05 CVE Updated
2024-10-27 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

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

CAPEC

References (7)

URL	Tag	Source

URL	Date	SRC
https://www.exploit-db.com/exploits/46183	2019-01-16

URL	Date	SRC

URL	Date	SRC
https://support.apple.com/kb/HT209340	2019-04-05
https://support.apple.com/kb/HT209342	2019-04-05
https://support.apple.com/kb/HT209343	2019-04-05
https://support.apple.com/kb/HT209344	2019-04-05
https://support.apple.com/kb/HT209345	2019-04-05
https://support.apple.com/kb/HT209346	2019-04-05

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Apple Search vendor "Apple"	Icloud Search vendor "Apple" for product "Icloud"	< 7.9 Search vendor "Apple" for product "Icloud" and version " < 7.9"	-	Affected	in	Microsoft Search vendor "Microsoft"	Windows Search vendor "Microsoft" for product "Windows"	-	-	Safe
Apple Search vendor "Apple"	Itunes Search vendor "Apple" for product "Itunes"	< 12.9.2 Search vendor "Apple" for product "Itunes" and version " < 12.9.2"	-	Affected	in	Microsoft Search vendor "Microsoft"	Windows Search vendor "Microsoft" for product "Windows"	-	-	Safe
Apple Search vendor "Apple"		Safari Search vendor "Apple" for product "Safari"				< 12.0.2 Search vendor "Apple" for product "Safari" and version " < 12.0.2"		-		Affected
Apple Search vendor "Apple"		Iphone Os Search vendor "Apple" for product "Iphone Os"				< 12.1.1 Search vendor "Apple" for product "Iphone Os" and version " < 12.1.1"		-		Affected
Apple Search vendor "Apple"		Tvos Search vendor "Apple" for product "Tvos"				< 12.1.1 Search vendor "Apple" for product "Tvos" and version " < 12.1.1"		-		Affected
Apple Search vendor "Apple"		Watchos Search vendor "Apple" for product "Watchos"				< 5.1.2 Search vendor "Apple" for product "Watchos" and version " < 5.1.2"		-		Affected