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An authentication issue was addressed with improved state management. This issue is fixed in macOS Ventura 13.6.4. A local attacker may be able to view the previous logged in user’s desktop from the fast user switching screen.

CVE-2023-42935 is a vulnerability identified in Apple macOS that allows a local attacker with low privileges to view the desktop environment of the previously logged-in user from the fast user switching screen. The root cause is an authentication issue related to improper state management during user switching, which fails to adequately isolate the previous user's desktop session from the current login screen. This flaw enables unauthorized access to potentially sensitive information visible on the prior user's desktop without requiring any user interaction. The vulnerability affects macOS versions prior to Ventura 13.6.4, where Apple addressed the issue by improving authentication state management. The CVSS v3.1 base score is 5.5 (medium severity), reflecting the local attack vector (AV:L), low attack complexity (AC:L), low privileges required (PR:L), no user interaction (UI:N), unchanged scope (S:U), high confidentiality impact (C:H), and no impact on integrity or availability (I:N/A:N). There are no known exploits in the wild at this time. The vulnerability is classified under CWE-287 (Improper Authentication). Given the requirement for local access and low privileges, exploitation is limited to scenarios where an attacker already has some level of access to the system, such as a shared workstation or a compromised user account. The vulnerability primarily threatens confidentiality by exposing desktop content of the previous user, which may include sensitive documents, emails, or other private information.

Detailed information about CVE-2023-42935: A local attacker may be able to view the previous logged in user’s desktop from the fast user switching screen in App

CVE-2023-42935: A local attacker may be able to view the previous logged in user’s desktop from the fast user switching screen in Apple macOS - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2023-42935: A local attacker may be able to view the previous logged in user’s desktop from the fast user switching screen in Apple macOS

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