full-disclosure - Re: FileCache: tmp file permission vulnerability.

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Message-Id: <201004030635.o336ZOYg002774@bari.maths.usyd.edu.au>
Date: Sat, 3 Apr 2010 17:35:24 +1100
From: paul.szabo@...ney.edu.au
To: bugs@....dhs.org, thecrux@...il.com
Cc: full-disclosure@...ts.grok.org.uk
Subject: Re: FileCache: tmp file permission vulnerability.

Vladimir Lettiev <thecrux@...il.com> wrote:

>> Perl Cache-Cache-1.06 ... stores its default file cache
>> in /tmp with world read/write permissions. ...
>
> This is documented behaviour. You can override insecure default cache
> root and umask with options 'cache_root' and 'directory_umask':
> use Cache::FileCache;
> use File::Temp qw/ tempdir /;
> my $cache = new Cache::FileCache( {
>     'cache_root' => tempdir('CacheXXXXX'),
>     'directory_umask' => 077,
> } );

The default should be secure. Interested people, with intimate knowledge
of inner workings, might go to contortions and change to insecure.

Cheers, Paul

Paul Szabo   psz@...hs.usyd.edu.au   http://www.maths.usyd.edu.au/u/psz/
School of Mathematics and Statistics   University of Sydney    Australia

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