On Windows, the shared %PROGRAMDATA% directory is searched for configuration files (SYSTEM_CONFIG_PATH and SYSTEM_JUPYTER_PATH), which may allow users to create configuration files affecting other users.
Only shared Windows systems with multiple users and unprotected %PROGRAMDATA% are affected.
jupyter_core>=5.8.1 (5.8.0 is patched but breaks jupyter-server) , or%PROGRAMDATA% directory so it is not writable by unauthorized users, or%PROGRAMDATA%\jupyter directory with appropriately restrictive permissions, or%PROGRAMDATA% environment variable to a directory with appropriately restrictive permissions (e.g. controlled by administrators or the current user)Reported via Trend Micro Zero Day Initiative as ZDI-CAN-25932
4.0.04.0.0.dev4.0.14.0.24.0.34.0.44.0.54.0.64.1.04.1.1+51 more5.8.1Exploitability
AV:LAC:LPR:LUI:RScope
S:UImpact
C:HI:HA:HCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H