CVE-2020-27943

Apple CoreText libType1Scaler.dylib Buffer Overflow

Severity Score

7.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A memory corruption issue existed in the processing of font files. This issue was addressed with improved input validation. This issue is fixed in tvOS 14.3, iOS 14.3 and iPadOS 14.3, macOS Big Sur 11.1, Security Update 2020-001 Catalina, Security Update 2020-007 Mojave, watchOS 7.2. Processing a maliciously crafted font file may lead to arbitrary code execution.

Se presentó un problema de corrupción de memoria en un procesamiento de archivos de fuentes. Este problema es abordado con una comprobación de la entrada mejorada. Este problema es corregido en tvOS versión 14.3, iOS versión 14.3 y iPadOS versión 14.3, macOS Big Sur versión 11.1, Security Update 2020-001 Catalina, Security Update 2020-007 Mojave, watchOS versión 7.2. El procesamiento de un archivo fuente diseñado maliciosamente puede conllevar a una ejecución de código arbitraria.

Apple CoreText libType1Scaler.dylib suffers from a heap buffer overflow vulnerability in the Counter Control Hints.

*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

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-10-27 CVE Reserved
2020-12-16 CVE Published
2024-03-08 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-787: Out-of-bounds Write

CAPEC

References (4)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://support.apple.com/en-us/HT212003	2022-06-28
https://support.apple.com/en-us/HT212005	2022-06-28
https://support.apple.com/en-us/HT212009	2022-06-28
https://support.apple.com/en-us/HT212011	2022-06-28

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Apple Search vendor "Apple"		Ipad Os Search vendor "Apple" for product "Ipad Os"				< 14.3 Search vendor "Apple" for product "Ipad Os" and version " < 14.3"		-		Affected
Apple Search vendor "Apple"		Iphone Os Search vendor "Apple" for product "Iphone Os"				< 14.3 Search vendor "Apple" for product "Iphone Os" and version " < 14.3"		-		Affected
Apple Search vendor "Apple"		Macos Search vendor "Apple" for product "Macos"				< 11.1.0 Search vendor "Apple" for product "Macos" and version " < 11.1.0"		-		Affected
Apple Search vendor "Apple"		Tvos Search vendor "Apple" for product "Tvos"				< 14.3 Search vendor "Apple" for product "Tvos" and version " < 14.3"		-		Affected
Apple Search vendor "Apple"		Watchos Search vendor "Apple" for product "Watchos"				< 7.2 Search vendor "Apple" for product "Watchos" and version " < 7.2"		-		Affected