CVE-2020-9818highunder attackCWE-787

CVE-2020-9818: high-severity vulnerability in Apple iOS

Published · Updated

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51Vexday Risk Score

Prioritize patching. It under exploitation confirmed by CISA.

ssvc Actcvss 8.8epss 2.3%
from disclosure to weapon
Published on NVDJun 9
CISA KEV+512d
Action required by CISAfederal deadline: 2022-05-03

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In short

A flaw in Apple's mail app allows maliciously crafted emails to write data beyond memory boundaries, potentially causing the app to crash or allowing attackers to modify system memory without proper authorization.

Technical detail

An out-of-bounds write vulnerability in iOS/iPadOS mail processing fails to properly validate buffer bounds when parsing specially crafted mail messages, allowing local or remote attackers to achieve arbitrary memory modification or denial of service via a malicious email attachment or content.

Summary generated and translated by AI from the official description.

The full analysis of this CVE is available in Portuguese →

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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H