[Bug 2076898] Re: Numeric name is accepted as valid username for useradd/groupadd

[Launchpad Bug Tracker]

This bug was fixed in the package shadow - 1:4.15.3-3ubuntu2

---------------
shadow (1:4.15.3-3ubuntu2) oracular; urgency=medium

  * d/p : disallow pure numeric user and group names (LP: #2076898)

 -- Hector Cao <hector.cao at canonical.com>  Tue, 13 Aug 2024 12:15:06
+0200

** Changed in: shadow (Ubuntu)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/2076898

Title:
  Numeric name is accepted as valid username for useradd/groupadd

Status in shadow package in Ubuntu:
  Fix Released

Bug description:
  Pure numeric names (example 0, 100) should be considered as invalid group and user names
  The command useradd and groupadd must refuse them

  This is not the case in the latest version of shadow :
  1:4.15.3-3ubuntu1

  When we issue:

  $ useradd 0

  The command succeeds instead of failing.

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