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[Bug 1719889] [NEW] internal-use-only SIDs being mapped to GIDs on users

 

Public bug reported:

Ubuntu server 16.04, samba/winbind package version 4.3.11+dfsg-
0ubuntu0.16.04.11

When logging in via SSH as a domain user the error "groups: cannot find
name for group ID 2005" is displayed.  running "id $username" also shows
this 2005 group with no name.

"wbinfo -G 2005" returns "S-1-18-1", no other lookups for 2005 or
S-1-18-1 return anything.

MS documentation lists S-1-18-1 as
AUTHENTICATION_AUTHORITY_ASSERTED_IDENTITY, which should not be exposed
in the manner that it is here.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: winbind 2:4.3.11+dfsg-0ubuntu0.16.04.11
ProcVersionSignature: Ubuntu 4.4.0-31.50-generic 4.4.13
Uname: Linux 4.4.0-31-generic x86_64
NonfreeKernelModules: zfs zunicode zcommon znvpair zavl
ApportVersion: 2.20.1-0ubuntu2.10
Architecture: amd64
Date: Wed Sep 27 08:25:47 2017
NmbdLog:
 
OtherFailedConnect: Yes
ProcEnviron:
 TERM=xterm-256color
 SHELL=/bin/bash
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 XDG_RUNTIME_DIR=<set>
SambaServerRegression: No
SmbConfIncluded: Yes
SmbLog:
 
SourcePackage: samba
UpgradeStatus: Upgraded to xenial on 2016-05-09 (505 days ago)

** Affects: samba (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug xenial

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https://bugs.launchpad.net/bugs/1719889

Title:
  internal-use-only SIDs being mapped to GIDs on users

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