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[QT][KDE] /.config creation (in rootfs!)
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Belliash
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Joined: 24 Nov 2004
Posts: 2396
Location: Legnica, Poland

PostPosted: Thu May 05, 2011 2:52 pm    Post subject: [QT][KDE] /.config creation (in rootfs!) Reply with quote

Hello,

I'd like to as what is able to create /.config file with Trolltech.conf file inside?
I use KDE 4.6.2 from normal user account. When i remove that directory it's newly creating after a while.
WTF? KDE launched from normal user account shouldnt have permission to write in rootfs (/)

Code:
/ # pwd
/
/ # ls -a
.   bin   [b].config[/b]  etc   lib    lib64    lost+found  mnt  proc  sbin  tmp  var
..  boot  dev      home  lib32  libexec  media       opt  root  sys   usr
/ # cd .config
.config # ls
Trolltech.conf


What is doing this and how to prevent this?
Thanks!
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Belliash
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Joined: 24 Nov 2004
Posts: 2396
Location: Legnica, Poland

PostPosted: Thu May 05, 2011 3:20 pm    Post subject: Reply with quote

After short discussion with UberPinguin on #gentoo-security we decided to do some testing, the result i'm writing down, to not lost that.
I have stopped xdm service and removed whole /.config directory.
Then i have logged in my account i use for every-day work and typed startx. KDE 4.6.2 has started up and /.config directory has been recreated.

Code:
/ $ ls -la .config
total 12
drwxr-xr-x  2 root root 4096 May  5 17:12 .
drwxr-xr-x 22 root root 4096 May  5 17:12 ..
-rw-r--r--  1 root root  278 May  5 17:12 Trolltech.conf


As you can see its created in / with root:root ownership :roll:
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ComaWhite
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Joined: 07 Oct 2008
Posts: 125

PostPosted: Sat May 07, 2011 1:12 pm    Post subject: Reply with quote

that Trolltech file is Qt doing that, not KDE.
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Belliash
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Joined: 24 Nov 2004
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Location: Legnica, Poland

PostPosted: Sun May 08, 2011 8:54 am    Post subject: Reply with quote

ComaWhite wrote:
that Trolltech file is Qt doing that, not KDE.


maybe, maybe not...
How you know?


First of all it's not created while launching every QT based software - i can login into failsafe and launch KWrite and that file wont be created.
Secondly its created during KDE startup process.

And finally - creating something in / needs root priviledges. Even if it is QT - its only library! Library not executed as stand-alone software! Library loaded by KDE with root priviledges!
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Freeky
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Joined: 11 Mar 2011
Posts: 79
Location: Novosibirsk, Russia

PostPosted: Mon May 30, 2011 3:21 am    Post subject: Reply with quote

ComaWhite wrote:
that Trolltech file is Qt doing that, not KDE.

I think it is connected just with kde. Because on my laptop with lxde and qt and this file is not.
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Core
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Joined: 14 May 2007
Posts: 29

PostPosted: Wed Aug 03, 2011 8:24 pm    Post subject: Reply with quote

https://bugs.kde.org/show_bug.cgi?id=249217

Using patch from this bug, works for me:

/etc/portage/env/sys-apps/dbus

Code:
post_src_prepare() {
epatch "/etc/portage/env/sys-apps/dbus-kde-fixpath.patch"
}


/etc/portage/env/sys-apps/dbus-kde-fixpath.patch

Code:
--- a/bus/activation-helper.c
+++ b/bus/activation-helper.c
@@ -344,6 +344,8 @@ switch_user (char *user, DBusError *error)
                       "cannot setuid user %i", pw->pw_uid);
       return FALSE;
     }
+
+  _dbus_setenv ("HOME", pw->pw_dir);
 #endif
   return TRUE;
 }



Code:
emerge -1 dbus
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046
Apprentice
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Joined: 21 Jul 2004
Posts: 229
Location: Yaroslavl, Russia

PostPosted: Tue Jan 08, 2013 4:51 pm    Post subject: Reply with quote

Problem not with dbus, but in kde.
patch for kdelibs https://bugs.kde.org/show_bug.cgi?id=249217#c43
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