RHSA-2020:1231 - Security Advisory

Topic

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 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 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):

• proglottis/gpgme: Use-after-free in GPGME bindings during container image pull (CVE-2020-8945)

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):

• rootless buildah does not work with UID in /etc/subuid (BZ#1765469)
• Extras RHEL-7.8 update - buildah (BZ#1791286)
• buildah should be linked against gpgme-pthread (BZ#1793074)

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 Server 7 x86_64
• Red Hat Enterprise Linux Workstation 7 x86_64
• Red Hat Enterprise Linux for IBM z Systems 7 s390x
• Red Hat Enterprise Linux for Power, little endian 7 ppc64le

Fixes

• BZ - 1765469 - rootless buildah does not work with UID in /etc/subuid
• BZ - 1791286 - Extras RHEL-7.8 update - buildah
• BZ - 1795838 - CVE-2020-8945 proglottis/gpgme: Use-after-free in GPGME bindings during container image pull

CVEs

• CVE-2020-8945

References

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