On dirait que le problème sur OpenSSL a aussi des répercussions sur
les affaires…
Début du message réexpédié :
De : CloudFlare Team <[email protected]>
Date : 12 avril 2014 07:12:08 HAEC
À : <[email protected]>
Objet : Your website is secure from the OpenSSL Heartbleed
vulnerability
Répondre à : <[email protected]>
You're protected from the Heartbleed vulnerability because you have
CloudFlare turned on for your website. We fixed the flaw on March
31 for all CloudFlare customers, a week before it was publicly
announced.
Heartbleed (CVE-2014-0160, http://www.openssl.org/) is a flaw in
OpenSSL, encryption software used by the vast majority of websites
to protect sensitive information. This vulnerability in OpenSSL
allows an attacker to reveal up to 64KB of memory to a connected
client or server. This flaw could expose sensitive data such as
passwords or usernames - even when you thought it was encrypted.
NO IMPACT ON CLOUDFLARE SERVICE. Our team has conducted a
comprehensive security review to ensure our customers were not
impacted. One concern is that an attacker had access to the exploit
before March 31 since the flaw was present since December 2011.
We've seen no evidence of this, but we're proceeding as if it is a
possibility.
PRIVATE KEY DATA. Our security and cryptographic team has been
testing the possibility that private SSL key data may have been
retrieved. We have been unable to replicate a situation where
private SSL key data would leak. We have set up a challenge to see
if others can exploit the bug. See more information on our blog:
http://blog.cloudflare.com/answering-the-critical-question-can-you-
get-private-ssl-keys-using-heartbleed
NEW CERTIFICATES FOR EVERYONE. Even though we have not been able to
use the exploit to leak public key data, we're proceeding out of an
abundance of caution. We've begun the process of reissuing and
revoking the keys CloudFlare manages on behalf of our customers. To
ensure that we don't overburden the certificate authority resources
given the scale at which CloudFlare operates, we are staging this
process. We expect that it will be complete by early next week.
GENERAL RECOMMENDATIONS FOR SAFE WEB HYGIENE
There are some precautions you can take to protect yourself from
the Heartbleed bug.
1. GET CUSTOM CERTIFICATES ISSUED. If you're using CloudFlare
custom certificates, have your certificate authority reissue you a
new certificate. After it is installed and confirmed working,
revoke all previous certificates.
2. UPGRADE OPENSSL ON YOUR SERVER. While CloudFlare is protecting
your server from receiving Heartbleed attacks, you should still
upgrade to the latest version of OpenSSL as soon as possible. Get
version 1.0.1g here:
https://www.openssl.org/.
If you can't upgrade immediately, you can recompile OpenSSL with -
DOPENSSL_NO_HEARTBEATS.
3. CHANGE PASSWORDS. Even with these fixes, we recommend that you
change your password for CloudFlare and any other online services
you may use. You should also consider enabling 2-factor
authentication, which will help protect your account even if your
password is compromised.
MORE INFORMATION AND FAQs. We have documented Frequently Asked
Questions (FAQs) here:
https://support.cloudflare.com/hc/en-us/articles/201660084-Update-
on-the-Heartbleed-OpenSSL-Vulnerability
If you have further questions, please contact www.cloudflare.com/
support
CloudFlare was one of the companies originally contacted by the
researchers who discovered the bug and has been working closely to
ensure that sites are protected. This is a serious issue for the
Internet as a whole and, as we learn more details, we'll continue
to update you on actions you can take to protect your online presence.
Thanks again for your support!
The CloudFlare Team
P.S. CloudFlare cryptography expert, Nick Sullivan, will be on a
webcast this Wednesday, April 16th, at 10:00AM Pacific, to answer
any questions you may have about Heartbleed. Register here:
https://cc.readytalk.com/cc/s/registrations/new?cid=it1914v5pbc0
