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Date: Mon, 18 Apr 2016 14:02:31 -0400
From: Randy Barlow <rbarlow@...hat.com>
To: Pulp Users <pulp-list@...hat.com>,
        OSS Security <oss-security@...ts.openwall.com>
Subject: CVE-2013-7450: Pulp < 2.3.0 distributed the same CA key to all users

Versions of Pulp < 2.3.0 distributed the same certificate authority key and
certificate to all Pulp users[0]. This CA is used by the /login API call
(pulp-admin login uses this call) to generate and sign a client certificate.
This client certificate is then used for subsequent API calls.

Due to this vulnerability, remote attackers are able to obtain the CA key
from the Pulp git repository and use it to generate valid client certificates
for any Pulp installations that use the default CA. The Pulp documentation
did not emphasize the importance of replacing this CA for production
deployments, so there may be users who use this common CA key in production
environments.

Users are urged to replace the CA certificate and key on any Pulp
installations that began their life with a version less than 2.3.0. Upgrading
alone is not sufficient, as Pulp upgrades do not replace existing CA key
pairs. Versions of Pulp >= 2.3.0 do ship a utility (pulp-gen-ca-certificate)
that is capable of generating a new CA keypair for you, but it should be
noted that there are some known local attacks that this script is vulnerable
to as well[1][2]. The best option is to generate your own CA certificate if
you are concerned about these local attacks.

Thanks to Sander Bos for notifying the Pulp team that we had neglected to
acquire a CVE for this vulnerability at the time of its discovery.


[0] CVE-2013-7450: https://bugzilla.redhat.com/show_bug.cgi?id=1003326
[1] CVE-2016-3095 (fixed in Pulp >= 2.8.2):
    http://www.openwall.com/lists/oss-security/2016/04/06/3
[2] CVE-2016-3106 (planned for Pulp 2.8.3):
    https://pulp.plan.io/issues/1827

-- 
Randy Barlow
irc:   bowlofeggs

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