adduser race conditions
christian.ehrhardt at canonical.com
Mon Feb 22 08:04:57 UTC 2021
On Fri, Feb 19, 2021 at 6:19 PM Brent W. Baccala <cosine at freesoft.org> wrote:
> Hi -
> I've found at least one race condition in the adduser script on Ubuntu 18.
> The program searches for an available UID (and GID), then adds the new user with the selected UID/GID numbers without any synchronization, so two near-simultaneous invocations of the program can produce two users with identical GIDs (what I saw), or, presumably, identical UIDs.
> Is there a bug/issue tracker somewhere for this program?
the upstream for this program is Debian  for general bugs and/or
feature requests you'd use those.
While the Ubuntu bug tracker  would mostly be for issues due to the
Ubuntu Delta or to ask for backports of fixes into active Ubuntu
Releases as part of the SRU process .
Do these pointers help enough to enable you to take the next step
reporting  this?
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