CVE-2024-27358 is a vulnerability identified in WithSecure Elements Agent and WithSecure Elements Client Security products for macOS, affecting versions through 23.x. The flaw allows local users with limited privileges to block an administrator from completing the installation process of the security software, effectively causing a denial-of-service (DoS) condition. This vulnerability does not compromise confidentiality or integrity but impacts availability by preventing the deployment or update of critical security components. The attack vector is local (AV:L), requiring low attack complexity (AC:L) and low privileges (PR:L), with no user interaction needed (UI:N). The scope is unchanged (S:U), meaning the impact is confined to the vulnerable component. The CVSS v3.1 base score is 3.3, indicating low severity. No known exploits have been reported in the wild, and no official patches or workarounds have been published at this time. The vulnerability likely stems from insufficient access control or race conditions during installation, allowing a local user to interfere with administrative operations. This could delay or prevent security updates or installations, potentially leaving systems exposed to other threats.

The primary impact of CVE-2024-27358 is a denial-of-service condition that disrupts the installation or update of WithSecure security software on macOS endpoints. For organizations relying on these products for endpoint protection, this could delay deployment of critical security updates or new installations, increasing the window of exposure to other vulnerabilities or malware. Although the vulnerability does not allow privilege escalation or data compromise, the inability to complete installations could hinder security posture and operational continuity. In environments with multiple users sharing machines or where local user accounts are common, the risk of exploitation increases. However, the requirement for local access and limited privileges reduces the likelihood of widespread exploitation. The absence of known exploits in the wild further lowers immediate risk but does not eliminate potential future threats. Overall, the impact is moderate operational disruption rather than direct data loss or system compromise.

To mitigate CVE-2024-27358, organizations should implement strict local user account controls on macOS systems running WithSecure Elements Agent or Client Security. Limit local user privileges to the minimum necessary, preventing non-administrative users from interfering with installation processes. Employ endpoint management solutions to monitor installation attempts and detect abnormal blocking behavior. Administrators should perform installations and updates in controlled environments or during maintenance windows to reduce interference risk. Until an official patch is released, consider isolating critical systems from untrusted local users and auditing local account activities. Engage WithSecure support for any available patches or recommended workarounds. Additionally, maintain comprehensive logging to identify potential exploitation attempts and ensure rapid response capabilities. Regularly review and update security policies to address local privilege misuse scenarios.