Out-of-bounds read in macOS - CVE-2021-1778
Published: February 2, 2021
Vulnerability identifier: #VU50200
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-1778
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary condition when processing image files within the curl implementation in the ImageIO component in macOS. A remote attacker can create a specially crafted file, trick the victim into opening it, trigger out-of-bounds read error and crash the system.
Affected software
macOS
iPadOS
Apple iOS
iPadOS
Apple iOS
How to mitigate CVE-2021-1778
Install updates from vendor's website.
macOS - addressed in versions 10.15.7 19H512, 11.2 20D64
iPadOS - update to 14.4 18D52
Apple iOS - update to 14.4 18D52
iPadOS - update to 14.4 18D52
Apple iOS - update to 14.4 18D52