full-disclosure - Re: Symlink vulnerabilities

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Message-ID: <a025f8ea10083631769addf5a2db466b.squirrel@fbi.dhs.org>
Date: Mon, 24 Oct 2011 14:44:42 -0400 (EDT)
From: bugs@....dhs.org
To: literalka@...a.eu
Cc: full-disclosure@...ts.grok.org.uk
Subject: Re: Symlink vulnerabilities


I think it was grep -H '\$\$'


> 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
>> > -------------------------------------------------------
>> >
>> > _______________________________________________
>> > Full-Disclosure - We believe in it.
>> > Charter: http://lists.grok.org.uk/full-disclosure-charter.html
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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/
> _______________________________________________
> Full-Disclosure - We believe in it.
> Charter: http://lists.grok.org.uk/full-disclosure-charter.html
> Hosted and sponsored by Secunia - http://secunia.com/


_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://secunia.com/