On Windows, configuring a named pipe server with pipe_mode will force ServerOptions::reject_remote_clients as false.

This drops any intended explicit configuration for the reject_remote_clients that may have been set as true previously.

The default setting of reject_remote_clients is normally true meaning the default is also overridden as false.

Workarounds

Ensure that pipe_mode is set first after initializing a ServerOptions. For example:

let mut opts = ServerOptions::new();
opts.pipe_mode(PipeMode::Message);
opts.reject_remote_clients(true);

Affected versions append root to group listings, unless the correct listing has exactly 1024 groups.

This affects both:

• The supplementary groups of a user
• The group access list of the current process

If the caller uses this information for access control, this may lead to privilege escalation.

This crate is not currently maintained, so a patched version is not available.

Versions older than 0.8.0 do not contain the affected functions, so downgrading to them is a workaround.

Recommended alternatives

• uzers (an actively maintained fork of the users crate)
• sysinfo