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

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OSSA-2020-004: Keystone credential endpoints allow owner modification and
are not protected from a scoped context
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:Date: May 06, 2020
:CVE: CVE-2020-12689,
      CVE-2020-12691

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-2020-12691) 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-2020-12689) 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.

Errata
~~~~~~
CVE-2020-12689 and CVE-2020-12691 were assigned after the original
publication date.

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-2020-12689, CVE-2020-12691)

References
~~~~~~~~~~
- - https://launchpad.net/bugs/1872733
- - https://launchpad.net/bugs/1872735
- - http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-12689
- - http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-12691

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.

OSSA History
~~~~~~~~~~~~
- - 2020-05-07 - Errata 1
- - 2020-05-06 - Original Version
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On Wed, May 6, 2020 at 2:49 PM Gage Hugo <gagehugo () gmail com> wrote: