Full Disclosure mailing list archives

Re: Ubuntu: reseed(8), random.org, and HTTP request


From: Jeffrey Walton <noloader () gmail com>
Date: Wed, 6 Jul 2011 06:53:31 -0400

On Wed, Jul 6, 2011 at 6:36 AM, Jonathan Le Vigouroux
<jonathan.levigouroux () gmail com> wrote:
Can you develop a bit about the:
you're surprised?
 [you must be new around here!]
I'm new here, and I'd like the reason(s) why you said that.
I don't mean to start a useless and finger-pointing debate, I just wanna be
put up to speed, that's all.
No flame war - coderman has some experience dealing with security and
cert teams. After some time, you'll see some of the more memorable
responses (other than no acknowledgement/no response). In the
meantime, check out the "Lamest Vendor Response" from the Pwnie
Awards: http://www.pwnies.com/.

Jeff

On Wed, Jul 6, 2011 at 9:44 AM, Jeffrey Walton <noloader () gmail com> wrote:

On Wed, Jul 6, 2011 at 3:23 AM, coderman <coderman () gmail com> wrote:
On Tue, Jul 5, 2011 at 9:04 PM, Jeffrey Walton <noloader () gmail com>
wrote:
Ubuntu's reseed(8) can be used to seed the PRNG state of a host. The
script is run when the package installed, and anytime su executes the
script.

... someone thought this was a good idea.
 [an entropy pool remotely biased by MitM attacker, maybe?]
:)

reseed(8) performs a unsecured HTTP request to random.org for its
bits, despite random.org offering HTTPS services.

https doesn't help if your host entropy pool is poorly seeded.
 [SSL/TLS needs entropy for authenticity/privacy.]


The Ubuntu Security Team took no interest when contacted by email (no
reply); the point of contact listed in the man pages took no interest
when contacted by email (no reply); and a launcher bug report was not
acted upon
(https://bugs.launchpad.net/ubuntu/+source/reseed/+bug/804594).

you're surprised?
Hardly - listed for completeness.

 [you must be new around here!]

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


Current thread: