⚠ Actively exploited
Added to CISA KEV on 2022-06-27. Federal agencies required to patch by 2022-07-18. Required action: Apply updates per vendor instructions..

CVE-2020-3837 — Out-of-bounds Write in Apple Macos

CWE-787 — Out-of-bounds WriteCWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer9 documents7 sources
Severity
7.8HIGHNVD
EPSS
6.4%
top 8.93%
CISA KEV
KEV
Added 2022-06-27
Due 2022-07-18
Exploit
Exploited in wild
Active exploitation observed
Affected products
7
Apple IOSApple MacosApple Tvos+4 more
Timeline
PublishedFeb 27
KEV addedJun 27
KEV dueJul 18
CISA Required Action: Apply updates per vendor instructions.

Description

A memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 13.3.1 and iPadOS 13.3.1, macOS Catalina 10.15.3, tvOS 13.3.1, watchOS 6.1.2. An application may be able to execute arbitrary code with kernel privileges.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HExploitability: 1.8 | Impact: 5.9

Affected Packages9 packages

▶CVEListV5apple/tvosunspecified — tvOS 13.3.1
▶NVDapple/tvos< 13.3.1
▶CVEListV5apple/macosunspecified — macOS Catalina 10.15.3
▶NVDapple/ipados< 13.3.1
▶CVEListV5apple/watchosunspecified — watchOS 6.1.2

🔴Vulnerability Details

6
GHSA
GHSA-qhhm-rhwq-mpvm: A memory corruption issue was addressed with improved memory handling↗2022-05-24
▶
Project0
An iOS hacker tries Android - Project Zero↗2020-12-01
▶
Project0
One Byte to rule them all - Project Zero↗2020-07-01
▶
Project0
A survey of recent iOS kernel exploits - Project Zero↗2020-06-01
▶
CVEList
CVE-2020-3837: A memory corruption issue was addressed with improved memory handling↗2020-02-27
▶

💥Exploits & PoCs

1
Exploit-DB
iOS/macOS - Out-of-Bounds Timestamp Write in IOAccelCommandQueue2::processSegmentKernelCommand()↗2020-02-10
▶

📋Vendor Advisories

1
CISA
Apple Multiple Products Memory Corruption Vulnerability↗2022-06-27
▶
CVE-2020-3837 — Out-of-bounds Write in Apple Macos | cvebase