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Date: Wed, 18 Jun 2014 21:35:37 -0700
From: Andrew Gaul <gaul@...che.org>
To: Kurt Seifried <kseifried@...hat.com>
Cc: oss-security@...ts.openwall.com
Subject: Re: TMP flaw in rackspace jclouds?

Kurt, thank you for bringing this flaw to my attention and I will
address it tomorrow.  I do not have a security background; can you
estimate the severity and whether we can continue discussion on the
public bug tracker?  For now I have bcc the Apache jclouds private
mailing list.  Also note that jclouds is an Apache project not a
Rackspace project and the canonical URLs are:

https://github.com/jclouds/jclouds
https://issues.apache.org/jira/browse/JCLOUDS

On Wed, Jun 18, 2014 at 08:52:59PM -0600, Kurt Seifried wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> https://github.com/rackspace/jclouds/
> 
> So CC'ing Andrew, he's a consistent contributor, I can't file an issue
> in Github (no link to it) so posting here and CC'ing him.
> 
> https://github.com/rackspace/jclouds/blob/master/scriptbuilder/src/main/java/org/jclouds/scriptbuilder/domain/Statements.java
> 
>   public static Statement extractTargzAndFlattenIntoDirectory(URI tgz,
> String dest) {
>       return new StatementList(ImmutableSet.<Statement> builder()
>             .add(exec("mkdir /tmp/$$"))
>             .add(extractTargzIntoDirectory(tgz, "/tmp/$$"))
>             .add(exec("mkdir -p " + dest))
>             .add(exec("mv /tmp/$$/*/* " + dest))
>             .add(exec("rm -rf /tmp/$$")).build());
>    }
> 
> 
> This is insecure, $$ == PID == predictable
> 
> http://kurt.seifried.org/2012/03/14/creating-temporary-files-securely/
> 
> use java.io.File.createTempFile() ? some interesting info at
> http://www.veracode.com/blog/2009/01/how-boring-flaws-become-interesting/
> 
> for directories there is a helpful posting at
> http://stackoverflow.com/questions/617414/create-a-temporary-directory-in-java
> 
> Thanks.
> 
> 
> - -- 
> Kurt Seifried -- Red Hat -- Product Security -- Cloud
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-- 
Andrew Gaul
http://gaul.org/

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