CVE-2023-28252: CLFS privilege escalation — ransomware exploitation
A vulnerability in the Common Log File System driver was actively used in Nokoyanya ransomware operations.
A vulnerability in the Common Log File System driver was actively used in Nokoyanya ransomware operations.
CVE-2023-28252 is a privilege escalation vulnerability in the Windows Common Log File System (CLFS) driver. At disclosure it was being actively exploited as a zero-day — Nokoyawa ransomware groups used it to gain SYSTEM access.
The April 2023 update was applied as mandatory to all WS2016–2022 systems. A verification report for our WS2019 servers was obtained via Zabbix.
Kopia is a cross-platform backup tool for Windows, macOS, and Linux with fast incremental backups, client-side end-to-end encryption, compression, and data deduplication. Prior to 0.23.0, Kopia's HTTP server started with --without-password accepts unauthenticated requests to /api/v1/repo/exists and forwards attacker-supplied SFTP storage configuration to blob.NewStorage, where externalSSH: true and sshArguments containing -oProxyCommand=<cmd> can cause exec.CommandContext("ss
CVE-2026-40952 is a privilege misconfiguration in the Secure Access installer for the Windows client and server prior to version 14.55. Attackers with local access to the client or server can use it to elevate privileges to Administrator when Secure Access is installed in a non-default location.
Vitest is a testing framework powered by Vite. Prior to 3.2.5 and 4.1.0, the Vitest UI/API server on Windows used isFileServingAllowed incorrectly for /__vitest_attachment__, allowing \\?\\..\\ path traversal to read files outside the project; exposed API write and rerun features such as saveTestFile and rerun could also allow arbitrary script execution. This issue is fixed in versions 3.2.5 and 4.1.0.