Bug 1855273 (CVE-2020-15720) - CVE-2020-15720 pki: Dogtag's python client does not validate certificates
Summary: CVE-2020-15720 pki: Dogtag's python client does not validate certificates
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2020-15720
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1426572 1855854 1855857 1926320 1926321
Blocks: 1850232
TreeView+ depends on / blocked
 
Reported: 2020-07-09 12:27 UTC by Cedric Buissart
Modified: 2021-02-16 19:41 UTC (History)
6 users (show)

Fixed In Version: pki 10.9.0
Clone Of:
Environment:
Last Closed: 2020-11-04 02:26:19 UTC
Embargoed:

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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2020:4847 0 None None None 2020-11-04 03:14:59 UTC

Description Cedric Buissart 2020-07-09 12:27:02 UTC 
Dogtag's pki.client.PKIConnection class disables python-requests certificate validation. The argument `verify=False` means that no certificate validation is performed at all [2]. The client accepts any certificate. Since the verify parameter is hard-coded in all request functions, it is not possible to override the setting.

PKIConnection should use requests default settings (verify with default certs) and offer an API to override default CA certs or disable requests.

[2] https://requests.readthedocs.io/en/master/user/advanced/#ssl-cert-verification
Comment 1 Cedric Buissart 2020-07-09 12:27:08 UTC 
Acknowledgments:

Name: Christian Heimes
Comment 2 Cedric Buissart 2020-07-10 17:13:58 UTC 
Created pki-core tracking bugs for this issue:

Affects: fedora-all [bug 1855854]
Comment 3 Cedric Buissart 2020-07-10 17:14:40 UTC 
Upstream fix : https://github.com/dogtagpki/pki/commit/50c23ec146ee9abf28c9de87a5f7787d495f0b72
Comment 6 Cedric Buissart 2020-10-15 07:38:41 UTC 
Statement:

In PKI, the pki.client.PKIConnection python class is used by the `pki-server` and `pkispawn` commands. `pki-server` runs locally on the server, thus not subject to a Person in the Middle attack. `pkispawn` may access remote node in decentralized or cloned contexts.

Identity Management (IPA) command line interface (the vault related sub-commands) may call pki.client.PKIConnection().
Comment 7 Product Security DevOps Team 2020-11-04 02:26:19 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2020-15720
Comment 8 errata-xmlrpc 2020-11-04 03:14:59 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:4847 https://access.redhat.com/errata/RHSA-2020:4847
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