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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Moderate: rpm-ostree and rpm-ostree-client security, bug fix, and enhancement update
Advisory ID:       RHSA-2017:0444-02
Product:           Red Hat Enterprise Linux Atomic Host
Advisory URL:      https://access.redhat.com/errata/RHSA-2017:0444
Issue date:        2017-03-02
CVE Names:         CVE-2017-2623 
=====================================================================

1. Summary:

An update for rpm-ostree and rpm-ostree-client is now available for Red Hat
Enterprise Linux Atomic Host 7.

Red Hat Product Security has rated this update as having a security impact
of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which
gives a detailed severity rating, is available for each vulnerability from
the CVE link(s) in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Atomic Host 7 - x86_64

3. Description:

The rpm-ostree tool binds together the RPM packaging model with the OSTree
model of bootable file system trees. It provides commands which can be used
both on client systems as well as server-side composes. The
rpm-ostree-client package provides commands usable on client systems to
upgrade and rollback.

The following packages have been upgraded to a later upstream version:
rpm-ostree (2017.1), rpm-ostree-client (2017.1). (BZ#1416089)

Security Fix(es):

* It was discovered that rpm-ostree and rpm-ostree-client fail to properly
check GPG signatures on packages when doing layering. Packages with
unsigned or badly signed content could fail to be rejected as expected.
This issue is partially mitigated on RHEL Atomic Host, where certificate
pinning is used by default. (CVE-2017-2623)

This issue was discovered by Colin Walters (Red Hat).

4. Solution:

For details on how to apply this update, which includes the changes
described in this advisory, refer to:

https://access.redhat.com/articles/11258

5. Bugs fixed (https://bugzilla.redhat.com/):

1416089 - Rebase ostree + rpm-ostree for 7.3.3
1421781 - Package layering non-root packages does not install var paths owned by root
1421867 - rpm-ostree daemon does not start when system is unsubscribed
1422157 - CVE-2017-2623 rpm-ostree and rpm-ostree-client fail to check gpg package signatures when layering

6. Package List:

Red Hat Enterprise Linux Atomic Host 7:

Source:
rpm-ostree-2017.1-5.atomic.el7.src.rpm
rpm-ostree-client-2017.1-6.atomic.el7.src.rpm

x86_64:
rpm-ostree-2017.1-5.atomic.el7.x86_64.rpm
rpm-ostree-client-2017.1-6.atomic.el7.x86_64.rpm
rpm-ostree-client-debuginfo-2017.1-6.atomic.el7.x86_64.rpm
rpm-ostree-debuginfo-2017.1-5.atomic.el7.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2017-2623
https://access.redhat.com/security/updates/classification/#moderate

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2017 Red Hat, Inc.
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