CVE-2021-1858

HIGH

macOS - Out-of-bounds Write via Malicious Image Processing

Title source: llm
STIX 2.1

Description

Processing a maliciously crafted image may lead to arbitrary code execution. This issue is fixed in Security Update 2021-002 Catalina, iOS 14.5 and iPadOS 14.5, watchOS 7.4, tvOS 14.5, macOS Big Sur 11.3. An out-of-bounds write issue was addressed with improved bounds checking.

References (5)

Core 5
Core References
Vendor Advisory x_refsource_misc
https://support.apple.com/en-us/HT212317
Vendor Advisory x_refsource_misc
https://support.apple.com/en-us/HT212323
Vendor Advisory x_refsource_misc
https://support.apple.com/en-us/HT212324
Vendor Advisory x_refsource_misc
https://support.apple.com/en-us/HT212325
Vendor Advisory x_refsource_misc
https://support.apple.com/en-us/HT212326

Scores

CVSS v3 7.8
EPSS 0.0114
EPSS Percentile 62.8%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Details

CWE
CWE-787
Status published
Products (21)
apple/ipados < 14.5
apple/iphone_os < 14.5
apple/mac_os_x 10.14
apple/mac_os_x 10.14.0
apple/mac_os_x 10.14.1
apple/mac_os_x 10.14.2
apple/mac_os_x 10.14.3
apple/mac_os_x 10.14.4 (2 CPE variants)
apple/mac_os_x 10.14.5
apple/mac_os_x 10.14.6 (17 CPE variants)
... and 11 more
Published Sep 08, 2021
Tracked Since Feb 18, 2026