Bug 56353 - Usernames invalid for Windows login are allowed in UCS (f.e. con.*)
Summary: Usernames invalid for Windows login are allowed in UCS (f.e. con.*)
Status: NEW
Alias: None
Product: UCS
Classification: Unclassified
Component: Samba
Version: UCS 5.0
Hardware: Other Linux
: P5 normal
Target Milestone: ---
Assignee: Samba maintainers
QA Contact: Samba maintainers
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2023-07-26 10:36 CEST by Jan-Luca Kiok
Modified: 2024-09-02 12:41 CEST (History)
1 user (show)

See Also:
What kind of report is it?: Bug Report
What type of bug is this?: 5: Major Usability: Impairs usability in key scenarios
Who will be affected by this bug?: 1: Will affect a very few installed domains
How will those affected feel about the bug?: 5: Blocking further progress on the daily work
User Pain: 0.143
Enterprise Customer affected?:
School Customer affected?:
ISV affected?:
Waiting Support:
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Bug group (optional): Regression
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Description Jan-Luca Kiok univentionstaff 2023-07-26 10:36:04 CEST 
+++ This bug was initially created as a clone of Bug #56152 +++

+++ This bug was initially created as a clone of Bug #53519 +++

In Windows, there are some names that are reserved for special use (https://docs.microsoft.com/en-us/windows/win32/fileio/naming-a-file).
With our freely definable scheme we allow user names that can lead to such names. If this happens, no check takes place and diffuse errors occur under Windows.
Most reserved names should be rare to non-existent, with con.* I can think of several names that can lead to such user names; as in the attached ticket.


This was fixed in the UCS@school importer (via not creating these names), but default UCS Samba domains are affected too and currently allow them.