Re: CERT Advisory: #144389 Return of Bleichenbacher's Oracle Threat (ROBOT)

Rob/Bradley:

I tested our web mail server (running domino httpd on IBMi) and I see that
it is in fact impacted by this issue. (see message below)

Our server rates an A+ now but I see in a warning message that it will be
downgraded to an F in February?
"This server is vulnerable to the Return Of Bleichenbacher's Oracle Threat
(ROBOT) vulnerability. Grade will be set to F from February 2018"

Maybe a configuration setting?

My domino developer is contacting Domino development for a response?

I have a PMR open at the moment for the IBMi and waiting for more info
from IBM.

I really don't want to disable all the RSA ciphers as I know that some of
our secure file transfers
with our trading partners connect using these ciphers.

Just waiting for IBM at the moment.

Jim

Jim W Grant
Senior VP, Chief Information Officer
Web: www.pdpgroupinc.com




From: "Bradley Stone" <bvstone@xxxxxxxxx>
To: "Midrange Systems Technical Discussion" <midrange-l@xxxxxxxxxxxx>
Date: 01/02/2018 12:55 PM
Subject: Re: CERT Advisory: #144389 Return of Bleichenbacher's
Oracle Threat (ROBOT)
Sent by: "MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx>



On Tue, Jan 2, 2018 at 11:13 AM, <JWGrant@xxxxxxxxxxxxxxx> wrote:

I also noticed that when running an SSL test with SSLLabs (
https://www.ssllabs.com/ssltest/)
our web servers, effective 2-1-18, SSL Labs will downgrade the TLS/SSL
ratings to an "F".

Anyone else seeing similar issues?

I just ran the test on my sites and got the same thing. Running on V7R3.
My certs are quite new.

Any action you're going to be taking, Jim? Or others?

Jim

Cert Info:

CERT Coordination Center (CERT/CC) has released information on a

Transport

Layer Security (TLS) vulnerability. Exploitation of this vulnerability
could allow an attacker to access sensitive information.
The TLS vulnerability is also known as Return of Bleichenbacher's Oracle
Threat (ROBOT). ROBOT allows an attacker to obtain the RSA key necessary
to decrypt TLS traffic under certain conditions. Mitigations include
installing updates to affected products as they become available.

US-CERT

encourages users and administrators to review CERT/CC Vulnerability Note
VU #144389.
http://www.kb.cert.org/vuls/id/144389

More information here:
https://robotattack.org/

Jim W Grant
Senior VP, Chief Information Officer
Web: www.pdpgroupinc.com