CVE-2020-9819 : A memory consumption issue was addressed with improved memory handling. This issue is fixed in iOS 13.5 and iPadOS 13.5,

A memory consumption issue was addressed with improved memory handling. This issue is fixed in iOS 13.5 and iPadOS 13.5, iOS 12.4.7, watchOS 6.2.5, watchOS 5.3.7. Processing a maliciously crafted mail message may lead to heap corruption.

Published 2020-06-09 17:15:13

Updated 2021-07-21 11:39:24

Source Apple Inc.

View at NVD, CVE.org

Vulnerability category: Memory Corruption

CVE-2020-9819 is in the CISA Known Exploited Vulnerabilities Catalog

CISA vulnerability name:

Apple iOS, iPadOS, and watchOS Memory Corruption Vulnerability

CISA required action:

Apply updates per vendor instructions.

CISA description:

Apple iOS, iPadOS, and watchOS Mail contains a memory corruption vulnerability that may allow heap corruption when processing a maliciously crafted mail message.

Added on 2021-11-03 Action due date 2022-05-03

Exploit prediction scoring system (EPSS) score for CVE-2020-9819

Probability of exploitation activity in the next 30 days: 0.59%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 78 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2020-9819

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
4.3	MEDIUM	AV:N/AC:M/Au:N/C:N/I:N/A:P	8.6	2.9	NIST
Access Vector: Network Access Complexity: Medium Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Partial
4.3	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L	2.8	1.4	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: Required Scope: Unchanged Confidentiality: None Integrity: None Availability: Low

CWE ids for CVE-2020-9819

CWE-787 Out-of-bounds Write

The product writes data past the end, or before the beginning, of the intended buffer.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2020-9819

https://support.apple.com/HT211169

About the security content of iOS 12.4.7 - Apple Support
Release Notes;Vendor Advisory

CVEs referencing this url
https://support.apple.com/HT211168

About the security content of iOS 13.5 and iPadOS 13.5 - Apple Support
Release Notes;Vendor Advisory

CVEs referencing this url
https://support.apple.com/HT211176

About the security content of watchOS 5.3.7 - Apple Support
Release Notes;Vendor Advisory

CVEs referencing this url
https://support.apple.com/HT211175

About the security content of watchOS 6.2.5 - Apple Support
Release Notes;Vendor Advisory

CVEs referencing this url

Products affected by CVE-2020-9819