RHSA-2017:0444 - Security Advisory

Topic

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.

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).

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

Affected Products

• Red Hat Enterprise Linux Atomic Host 7 x86_64

Fixes

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

CVEs

• CVE-2017-2623

References

• https://access.redhat.com/security/updates/classification/#moderate