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Red Hat Security Advisory

Synopsis: Important: buildah security and bug fix update
Advisory ID: RHSA-2020:2116-01
Product: Red Hat Enterprise Linux Extras
Advisory URL: https://access.redhat.com/errata/RHSA-2020:2116
Issue date: 2020-05-12
CVE Names: CVE-2020-1702 CVE-2020-10696
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1. Summary:

An update for buildah is now available for Red Hat Enterprise Linux 7
Extras.

Red Hat Product Security has rated this update as having a security impact
of Important. 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 7 Extras – ppc64le, s390x, x86_64

3. Description:

The buildah package provides a tool for facilitating building OCI container
images. Among other things, buildah enables you to: Create a working
container, either from scratch or using an image as a starting point;
Create an image, either from a working container or using the instructions
in a Dockerfile; Build both Docker and OCI images.

Security Fix(es):

* buildah: Crafted input tar file may lead to local file overwrite during
image build process (CVE-2020-10696)

* containers/image: Container images read entire image manifest into memory
(CVE-2020-1702)

For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE
page(s) listed in the References section.

Bug Fix(es):

* buildah is not expanding env vars in file paths (BZ#1822031)

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/):

1792796 – CVE-2020-1702 containers/image: Container images read entire image manifest into memory
1817651 – CVE-2020-10696 buildah: Crafted input tar file may lead to local file overwrite during image build process
1822031 – buildah is not expanding env vars in file paths [extras-rhel-7.8/buildah]

6. Package List:

Red Hat Enterprise Linux 7 Extras:

Source:
buildah-1.11.6-11.el7_8.src.rpm

ppc64le:
buildah-1.11.6-11.el7_8.ppc64le.rpm
buildah-debuginfo-1.11.6-11.el7_8.ppc64le.rpm

s390x:
buildah-1.11.6-11.el7_8.s390x.rpm
buildah-debuginfo-1.11.6-11.el7_8.s390x.rpm

x86_64:
buildah-1.11.6-11.el7_8.x86_64.rpm
buildah-debuginfo-1.11.6-11.el7_8.x86_64.rpm

Red Hat Enterprise Linux 7 Extras:

Source:
buildah-1.11.6-11.el7_8.src.rpm

x86_64:
buildah-1.11.6-11.el7_8.x86_64.rpm
buildah-debuginfo-1.11.6-11.el7_8.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-2020-1702
https://access.redhat.com/security/cve/CVE-2020-10696
https://access.redhat.com/security/updates/classification/#important

8. Contact:

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

Copyright 2020 Red Hat, Inc.
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