full-disclosure - Re: Symlink vulnerabilities

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Date: Sat, 22 Oct 2011 15:13:31 -0600
From: Leon Kaiser <literalka@...il.com>
To: full-disclosure@...ts.grok.org.uk
Subject: Re: Symlink vulnerabilities

May I ask what the grep(1) pattern was?
-- 
========================================================
Leon Kaiser      - Head of GNAA Public Relations -
        literalka@...a.eu || literalka@...tse.fr
       http://gnaa.eu || http://security.goatse.fr
      7BEECD8D FCBED526 F7960173 459111CE F01F9923
"The mask of anonymity is not intensely constructive."
       -- Andrew "weev" Auernheimer
======================================================== 

On Sat, 2011-10-22 at 07:54 -0400, bugs@....dhs.org wrote:

> I apologize as my search wasn't a complex method, just a quick grep for
> signs of /tmp misuse. Indeed creating a directory under /tmp is a safeway
> to handle tmp files.
> 
> > bugs@....dhs.org wrote:
> >>
> >> bashbug:
> >>
> >> /usr/bin/bashbug:TEMPDIR=$TMPDIR/bbug.$$
> >>
> >> Maybe I should use bashbug to report a bug in bashbug?
> >>
> >
> > I took a quick look, it's actually using mkdir to create a temporary
> > directory in /tmp, which it uses for collecting support files.
> >
> > This is actually a safe way to use /tmp, assuming you check the return
> > code
> > of mkdir (which it does). The mkdir() system call behaves very differently
> > to open(), and is not vulnerable to these attacks.
> >
> > Tavis.
> >
> > --
> > -------------------------------------
> > taviso@...xchg8b.com | pgp encrypted mail preferred
> > -------------------------------------------------------
> >
> > _______________________________________________
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> 
> 
> _______________________________________________
> Full-Disclosure - We believe in it.
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Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://secunia.com/