RHSA-2020:2116 - 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 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.

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)

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

CVEs

• CVE-2020-1702
• CVE-2020-10696

References

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