Input validation error in macOS - CVE-2021-30833
Published: October 27, 2021 / Updated: February 16, 2022
Vulnerability identifier: #VU57745
CSH Severity: High
CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-30833
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to compromise the affected system.
The vulnerability exists due to insufficient validation of user-supplied input when processing xar archives. A remote attacker can create a specially crafted .xar archive, trick the victim into opening it and overwrite arbitrary files on the system.
Successful exploitation of the vulnerability may allow an attacker to compromise the affected system.
Affected software
macOS
Gentoo Linux
app-arch/xar
Gentoo Linux
app-arch/xar
How to mitigate CVE-2021-30833
Install updates from vendor's website.
macOS - addressed in versions 12.0.1 21A559, 10.15.7 19H1519, 11.6.1 20G224
app-arch/xar - update to 1.8.0.0.487.100.1
app-arch/xar - update to 1.8.0.0.487.100.1