Why does Samba requires 777 permissions on /tmp

Mon May 27 20:05:45 UTC 2013

Hi Bob,

I just went into /usr/local/etc/pkgtools.conf and changed the PKG_TMPDIR
variable to a non-world writable directory called /build and still see the
warnings below:

/usr/local/lib/ruby/site_ruby/1.8/pkgtools/pkgtools.rb:483: warning:
Insecure world writable dir /tmp/ in PATH, mode 041777
/usr/local/lib/ruby/site_ruby/1.8/pkgtools/pkgtools.rb:1170: warning:
Insecure world writable dir /tmp/ in PATH, mode 041777
/usr/local/lib/ruby/site_ruby/1.8/pkgtools/pkgmisc.rb:108: warning:
Insecure world writable dir /tmp/ in PATH, mode 041777
/usr/local/lib/ruby/site_ruby/1.8/pkgtools/pkgtools.rb:483: warning:
Insecure world writable dir /tmp/ in PATH, mode 041777

On Mon, May 27, 2013 at 2:54 PM, Bob Eager <rde at tavi.co.uk> wrote:

> Did you try changing PKG_TMPDIR as I suggested? (see below)
>
>
> On Mon, 27 May 2013 14:45:05 -0500
> sindrome <sindrome at gmail.com> wrote:
>
> > Hi Guys,
> >
> > I just got home from being out of town and the problem still persists
> > even after I removed . from my path.
> >
> > echo $PATH
> >
> /bin:/usr/lib:/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/home/sindrome/.gnupg:/home/sindrome/bin:/home/sindrome/docs:/home/sindrome/docs/info:/home/sindrome/docs/config:/sbin:/bin:/etc:/usr/bin:/usr/games:/usr/local/sbin:/usr/local/bin:
> >
> > Here's what I get when I portupgrade an outdated port.
> >
> >
> > /usr/local/lib/ruby/site_ruby/1.8/pkgtools/pkgtools.rb:483: warning:
> > Insecure world writable dir /tmp/ in PATH, mode 041777
> > /usr/local/lib/ruby/site_ruby/1.8/pkgtools/pkgtools.rb:1170: warning:
> > Insecure world writable dir /tmp/ in PATH, mode 041777
> > /usr/local/lib/ruby/site_ruby/1.8/pkgtools/pkgmisc.rb:108: warning:
> > Insecure world writable dir /tmp/ in PATH, mode 041777
> > /usr/local/lib/ruby/site_ruby/1.8/pkgtools/pkgtools.rb:483: warning:
> > Insecure world writable dir /tmp/ in PATH, mode 041777
> >
> >
> >
> > On Mon, May 20, 2013 at 4:58 PM, Simon Wright <simon.wright at gmx.net>
> > wrote:
> >
> > > On 20/05/2013 15:38, Bob Eager wrote:
> > >
> > >> On Mon, 20 May 2013 08:03:09 -0500
> > >> sindrome <sindrome at gmail.com> wrote:
> > >>
> > >> What I think is happening is that portupgrade is building and
> > >> running shell scripts in /tmp. It's running them with (in ruby):
> > >>
> > >>    system('/tmp/script')             [roughly]
> > >>
> > >> The ruby runtime is checking the *path-to-the-command* and THAT is
> > >> what it's complaining about.
> > >>
> > >> Try setting PKG_TMPDIR (in pkgtools.conf) to some suitable non
> > >> world writable temporary directory.
> > >>
> > >> I have an older ports tree on this machine or I'd try it myself. I
> > >> had to download the latest sources to check all this,
> > >>
> > >
> > > Trying to summarise what I've tested here with the results.
> > >
> > > My PKG_TMPDIR and TMPDIR are set to /var/tmp:
> > >
> > > pkgtools.conf:
> > >
> > >   ENV['TMPDIR'] ||= '/var/tmp'
> > >   ENV['PKG_TMPDIR'] ||= '/var/tmp'
> > >   ENV['PORTSDIR'] ||= '/usr/ports'
> > >   ENV['PACKAGES'] ||= ENV['PORTSDIR'] + '/packages'
> > >
> > > from /usr/local/etc/sudoers:
> > > # Uncomment if needed to preserve environmental variables related
> > > to the # FreeBSD pkg_* utilities and fetch.
> > > Defaults        env_keep += "PKG_PATH PKG_DBDIR PKG_TMPDIR TMPDIR
> > > PACKAGEROOT PACKAGESITE PKGDIR FTP_PASSIVE_MODE"
> > >
> > > [simon at vmserver04 ~]$ ls -ld /var/tmp
> > > drwxrwxr-t  9 root  wheel  33280 May 20 23:02 /var/tmp/
> > >
> > > Note: /var/tmp is not world writeable
> > >
> > > [simon at vmserver04 ~]$ echo $PATH
> > > /sbin:/bin:/usr/sbin:/usr/bin:**/usr/games:/usr/local/sbin:/**
> > > usr/local/bin:/usr/X11R6/bin:/**usr/local/scripts:
> > >
> > > root at vmserver04:/root # echo $PATH
> > > /sbin:/bin:/usr/sbin:/usr/bin:**/usr/games:/usr/local/sbin:/**
> > > usr/local/bin:/root/bin
> > >
> > > I run portupgrade via sudo but both $PATH's show no /tmp or .
> > >
> > > [simon at vmserver04 ~]$ ruby -v
> > > ruby 1.8.7 (2012-10-12 patchlevel 371) [amd64-freebsd9]
> > >
> > > portupgrade-2.4.10.5_1,2 FreeBSD ports/packages administration and
> > > management tool s
> > >
> > > Other (not likely) relevant stuff:
> > > - I have /usr/ports mounted rw with NFS
> > > - I have the packages directory mounted rw with NFS and amd then
> > > redefine $PACKAGES to point to the mount point
> > > This has been working for several years with no issues
> > >
> > > [simon at vmserver04 ~]$ sudo portupgrade -v portupgrade*
> > > --->  Reading default options: -v -D
> > > -l /var/tmp/portupgrade.results_ 20130520-22:**56:25
> > > -L /var/tmp/portupgrade/%s::%s.**log --->  Session started at: Mon,
> > > 20 May 2013 22:56:26 +0200 ** None has been installed or upgraded.
> > > --->  Saving the results to
> > > '/var/tmp/portupgrade.results_20130520-22** :56:25'
> > > /usr/local/lib/ruby/site_ruby/**1.8/pkgtools/pkgtools.rb:483:
> > > warning: Insecure world writable dir /tmp/ in PATH, mode 041777
> > >
> > > Still the complaint about /tmp/
> > >
> > > [simon at vmserver04 ~]$ sudo chmod 1775 /tmp
> > >
> > > [simon at vmserver04 ~]$ ls -ld /tmp
> > > drwxrwxr-t  9 root  wheel  1024 May 20 23:16 /tmp/
> > >
> > > [simon at vmserver04 ~]$ sudo portupgrade -v portupgrade*
> > > --->  Reading default options: -v -D
> > > -l /var/tmp/portupgrade.results_ 20130520-23:**16:07
> > > -L /var/tmp/portupgrade/%s::%s.**log --->  Session started at: Mon,
> > > 20 May 2013 23:16:07 +0200 ** None has been installed or upgraded.
> > > --->  Saving the results to '/var/tmp
> > > /portupgrade.results_20130520-23:16:07'
> > > --->  Session ended at: Mon, 20 May 2013 23:16:08 +0200 (consumed
> > > 00:00:00)
> > >
> > > No more complaint.
> > >
> > > I can't read the portupgrade code well enough to see what it's
> > > doing with the script, but if Bob is right that Ruby is running the
> > > portupgrade commands from /tmp then the error is within the checks
> > > in Ruby which is saying the 777 permission on /tmp is not
> > > acceptable, 775 *is* acceptable. Which is strange since surely then
> > > everyone with 777 permissions on /tmp would be seeing this message?
> > > Does this get us any further?
> > >
> > > Thanks for all the input, it is appreciated.
> > >
> > > Cheers
> > >
> > > Simon.
> > >
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