Out-of-bounds read in macOS - CVE-2021-30733
Published: July 22, 2021
Vulnerability identifier: #VU55228
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-2021-30733
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 CoreText. A remote attacker can create a specially crafted font file, trick the victim into opening it, trigger out-of-bounds read error and read contents of process memory.
Affected software
macOS
How to mitigate CVE-2021-30733
Install updates from vendor's website.
macOS - addressed in versions 10.15.7 19H1323, 10.14.6 18G9323, 11.4 20F71