Out-of-bounds read in Apple iOS and iPadOS - CVE-2021-30831
Published: December 8, 2021
Vulnerability identifier: #VU58686
CSH Severity: Medium
CVSS v4.0: 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/E:U/U:Green
CVE-ID: CVE-2021-30831
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Apple Inc.
Affected software:
Apple iOS
iPadOS
Apple iOS
iPadOS
Detailed vulnerability description
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.
How to mitigate CVE-2021-30831
Install updates from vendor's website.