#VU56726 UNIX symbolic link following in Apple iOS and iPadOS - CVE-2021-30855
Published: September 20, 2021
Vulnerability identifier: #VU56726
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-30855
CWE-ID: CWE-61
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Apple iOS
iPadOS
Apple iOS
iPadOS
Software vendor:
Apple Inc.
Apple Inc.
Description
The vulnerability allows a local application to gain access to otherwise restricted functionality.
The vulnerability exists due to a symlink following issue in Preferences. A local application can create a specially crafted symbolic link to a critical file on the system and access restricted files.
Remediation
Install updates from vendor's website.