Openwall GNU/*/Linux - a small security-enhanced Linux distro for servers
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Sat,  4 Jun 2016 10:54:19 -0400 (EDT)
From: cve-assign@...re.org
To: sebastian@...ping.org
Cc: cve-assign@...re.org, oss-security@...ts.openwall.com
Subject: Re: expat hash collision fix too predictable?

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

> Please confirm that using CVE-2012-6702 for consequences of
> "unanticipated internal calls to srand" is what you intended.

Yes, we confirm that. (They are unanticipated both because of
thread-safety concerns, and because it's possible for an application
to have an important dependency on srand being called exactly once.)


> The hash DoS vulnerability CVE-2012-0876 was fixed to some extend in
> Expat 2.1.0, commit e3e81a6d
> ...
> The next release of Expat will not do internal calls to srand (or rand)
> any more but extract and use entropy from other sources.
> ...
> I suppose hash initialization with (too little /) second-based
> entropy still is part of the original CVE-2012-0876 (or the same again).

Use CVE-2016-5300 for the separate issue in which the original choices
of entropy source and RNG did not properly address the possibility of
a successful hash DoS attack. In other words, the code changes (in the
next release) to fix CVE-2016-5300 are needed because the original fix
for CVE-2012-0876 was insufficient. (We use separate CVE IDs when
follow-on work is needed to complete the solution to the same original
vulnerability finding.)

- -- 
CVE Assignment Team
M/S M300, 202 Burlington Road, Bedford, MA 01730 USA
[ A PGP key is available for encrypted communications at
  http://cve.mitre.org/cve/request_id.html ]
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
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=r9fV
-----END PGP SIGNATURE-----

Powered by blists - more mailing lists

Your e-mail address:

Please check out the Open Source Software Security Wiki, which is counterpart to this mailing list.

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.