Full Disclosure: Re: Symlink vulnerabilities

[Tavis Ormandy <taviso () cmpxchg8b com>]

bugs () fbi 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 () cmpxchg8b com | pgp encrypted mail preferred
-------------------------------------------------------

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