CVE-2021-1840 — Out-of-bounds Write in Apple Macos

CWE-787 — Out-of-bounds WriteCWE-20 — Improper Input Validation5 documents4 sources
Severity
7.8HIGHNVD
EPSS
0.1%
top 78.82%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Apple MacosApple MAC OS X
Timeline
PublishedSep 8
Latest updateMay 24

Description

A memory corruption issue was addressed with improved validation. This issue is fixed in macOS Big Sur 11.3, Security Update 2021-002 Catalina, Security Update 2021-003 Mojave. A local attacker may be able to elevate their privileges.

CVSS vector

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

Affected Packages3 packages

▶CVEListV5apple/macosunspecified — 11.3+1
▶NVDapple/macos11.0 — 11.3
▶NVDapple/mac_os_x16 versions+15

🔴Vulnerability Details

2
GHSA
GHSA-vgh4-jr3v-jg28: A memory corruption issue was addressed with improved validation↗2022-05-24
▶
CVEList
CVE-2021-1840: A memory corruption issue was addressed with improved validation↗2021-09-08
▶

📋Vendor Advisories

2
Apple
CVE-2021-1840: Security Update 2021-002 Catalina↗2021-04-26
▶
Apple
CVE-2021-1840: macOS Big Sur 11.3↗2021-04-26
▶
CVE-2021-1840 — Out-of-bounds Write in Apple Macos | cvebase