CVE-2020-9818

Apple iOS, iPadOS, and watchOS Out-of-Bounds Write Vulnerability

Severity Score

8.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

Yes

*KEV

Decision

Act

*SSVC

Descriptions

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 13.5 and iPadOS 13.5, iOS 12.4.7, watchOS 6.2.5. Processing a maliciously crafted mail message may lead to unexpected memory modification or application termination.

Se abordó un problema de escritura fuera de límites con una comprobación de límites mejorada. Este problema es corregido en iOS versión 13.5 y iPadOS versión 13.5, iOS 12.4.7, watchOS versión 6.2.5. El procesamiento de un mensaje de correo diseñado con fines maliciosos puede conllevar a modificaciones inesperadas de la memoria o la finalización de la aplicación

iOS 13.5 and iPadOS 13.5 address bypass, code execution, cross site scripting, denial of service, double free, information leakage, integer overflow, out of bounds read, out of bounds write, and use-after-free vulnerabilities.

Apple iOS, iPadOS, and watchOS Mail contains an out-of-bounds write vulnerability which may allow memory modification or application termination when processing a maliciously crafted mail message.

*Credits: N/A

CVSS Scores

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

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:Act

Exploitation

Active

Automatable

Tech. Impact

Total

* Organization's Worst-case Scenario

Timeline

2020-03-02 CVE Reserved
2020-05-29 CVE Published
2021-11-03 Exploited in Wild
2022-05-03 KEV Due Date
2025-01-29 CVE Updated
2025-03-30 EPSS Updated
---------- First Exploit

CWE

CWE-787: Out-of-bounds Write

CAPEC

References (3)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://support.apple.com/HT211168	2020-06-12
https://support.apple.com/HT211169	2020-06-12
https://support.apple.com/HT211175	2020-06-12

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Apple Search vendor "Apple"		Ipados Search vendor "Apple" for product "Ipados"				< 13.5 Search vendor "Apple" for product "Ipados" and version " < 13.5"		-		Affected
Apple Search vendor "Apple"		Iphone Os Search vendor "Apple" for product "Iphone Os"				< 12.4.7 Search vendor "Apple" for product "Iphone Os" and version " < 12.4.7"		-		Affected
Apple Search vendor "Apple"		Iphone Os Search vendor "Apple" for product "Iphone Os"				>= 13.0 < 13.5 Search vendor "Apple" for product "Iphone Os" and version " >= 13.0 < 13.5"		-		Affected
Apple Search vendor "Apple"		Watchos Search vendor "Apple" for product "Watchos"				< 6.2.5 Search vendor "Apple" for product "Watchos" and version " < 6.2.5"		-		Affected