Out-of-bounds read in iPadOS and Apple iOS - CVE-2021-30831
Published: December 8, 2021
Vulnerability identifier: #VU58686
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-30831
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 in the FontParser subsystem. A remote attacker can trick the victim to open a specially crafted website or document, trigger an out-of-bounds read error and read contents of memory on the system.
Affected software
iPadOS
Apple iOS
macOS
Apple iOS
macOS
How to mitigate CVE-2021-30831
Install updates from vendor's website.
iPadOS - update to 15.0 19A346
Apple iOS - update to 15.0 19A346
macOS - update to 12.0.1 21A559
Apple iOS - update to 15.0 19A346
macOS - update to 12.0.1 21A559