// impact
On Windows, the shared %PROGRAMDATA% directory is searched for configuration files (SYSTEMCONFIGPATH and SYSTEMJUPYTERPATH), which may allow users to create configuration files affecting other users.
Only shared Windows systems with multiple users and unprotected %PROGRAMDATA% are affected.
// mitigations- upgrade to jupytercore>=5.8.1 (5.8.0 is patched but breaks jupyter-server) , or
- as administrator, modify the permissions on the %PROGRAMDATA% directory so it is not writable by unauthorized users, or
- as administrator, create the %PROGRAMDATA%\jupyter directory with appropriately restrictive permissions, or
- as user or administrator, set the %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
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High