oss-security - [OSSA-2020-004] Keystone: Keystone credential endpoints allow owner modification and are not protected from a scoped context (CVE PENDING)

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Message-ID: <CAE4Awf_qX8osK8cvGF=+1Lozp9+TR442K7KDSATX_zJE2EW9Gg@mail.gmail.com>
Date: Wed, 6 May 2020 14:49:25 -0500
From: Gage Hugo <gagehugo@...il.com>
To: oss-security@...ts.openwall.com
Subject: [OSSA-2020-004] Keystone: Keystone credential endpoints allow owner
 modification and are not protected from a scoped context (CVE PENDING)

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512

=================================================================================================================
OSSA-2020-004: Keystone credential endpoints allow owner modification and
are not protected from a scoped context
=================================================================================================================

:Date: May 06, 2020
:CVE: Pending


Affects
~~~~~~~
- - Keystone: <15.0.1, ==16.0.0


Description
~~~~~~~~~~~
kay reported two vulnerabilities in keystone's EC2 credentials API.
Any authenticated user could create an EC2 credential for themselves
for a project that they have a specified role on, then perform an
update to the credential user and project, allowing them to masquerade
as another user. (CVE #1 PENDING) Any authenticated user within a
limited scope (trust/oauth/application credential) can create an EC2
credential with an escalated permission, such as obtaining admin while
the user is on a limited viewer role. (CVE #2 PENDING) Both of these
vulnerabilities potentially allow a malicious user to act as admin on
a project that another user has the admin role on, which can
effectively grant the malicious user global admin privileges.


Patches
~~~~~~~
- - https://review.opendev.org/725895 (Rocky)
- - https://review.opendev.org/725893 (Stein)
- - https://review.opendev.org/725891 (Train)
- - https://review.opendev.org/725888 (Ussuri)
- - https://review.opendev.org/725886 (Victoria)


Credits
~~~~~~~
- - kay (CVE Pending)


References
~~~~~~~~~~
- - https://launchpad.net/bugs/1872733
- - https://launchpad.net/bugs/1872735
- - http://cve.mitre.org/cgi-bin/cvename.cgi?name=Pending


Notes
~~~~~
- - The stable/rocky branch is under extended maintenance and will receive
no new
  point releases, but a patch for it is provided as a courtesy.
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