Information disclosure in macOS - CVE-2021-30966
Published: December 14, 2021
Vulnerability identifier: #VU58851
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-30966
CWE-ID: CWE-200
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 logic error in the CFNetwork Proxies implementation. User's traffic can be unexpectedly leaked to a proxy server despite PAC configurations.
Affected software
macOS
watchOS
tvOS
Apple iOS
iPadOS
watchOS
tvOS
Apple iOS
iPadOS
How to mitigate CVE-2021-30966
Install updates from vendor's website.
macOS - update to 12.1 21C52
watchOS - update to 8.3 19S55
tvOS - update to 15.2 19K53
Apple iOS - addressed in versions 15.2 19C56, 15.2 19C57
iPadOS - update to 15.2 19C56
watchOS - update to 8.3 19S55
tvOS - update to 15.2 19K53
Apple iOS - addressed in versions 15.2 19C56, 15.2 19C57
iPadOS - update to 15.2 19C56