Out-of-bounds read in macOS - CVE-2021-1858
Published: April 27, 2021 / Updated: May 21, 2021
Vulnerability identifier: #VU52663
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-1858
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition within the DecodeRow function in ImageIO. A remote attacker can create a specially crafted KTX image, trick the victim into opening it, trigger out-of-bounds read error and read contents of memory on the system.
Affected software
macOS
watchOS
iPadOS
tvOS
Apple iOS
watchOS
iPadOS
tvOS
Apple iOS
How to mitigate CVE-2021-1858
Install updates from vendor's website.
macOS - update to 11.3 20E232
watchOS - update to 7.4 18T195
iPadOS - update to 14.5 18E199
tvOS - update to 14.5 18L204
Apple iOS - update to 14.5 18E199
watchOS - update to 7.4 18T195
iPadOS - update to 14.5 18E199
tvOS - update to 14.5 18L204
Apple iOS - update to 14.5 18E199