Improper Verification of Cryptographic Signature in iPadOS and Apple iOS - CVE-2021-30773
Published: July 22, 2021
Vulnerability identifier: #VU55223
CSH Severity: Low
CVSS v4 BT: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2021-30773
CWE-ID: CWE-347
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local application to bypass implemented security restrictions.
The vulnerability exists due to improper signature validation within the Identity Service component. A malicious application can bypass code signing checks.
Affected software
iPadOS
Apple iOS
watchOS
tvOS
Apple iOS
watchOS
tvOS
How to mitigate CVE-2021-30773
Install updates from vendor's website.
iPadOS - addressed in versions 14.7 18G69, 14.7 18G70
Apple iOS - update to 14.7 18G69
watchOS - update to 7.6 18U63
tvOS - update to 14.7 18M60
Apple iOS - update to 14.7 18G69
watchOS - update to 7.6 18U63
tvOS - update to 14.7 18M60