RHSA-2020:1234 - Security Advisory

Topic

An update for docker 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

Docker is an open-source engine that automates the deployment of any application as a lightweight, portable, self-sufficient container that runs virtually anywhere.

Security Fix(es):

• runc: AppArmor/SELinux bypass with malicious image that specifies a volume at /proc (CVE-2019-16884)
• proglottis/gpgme: Use-after-free in GPGME bindings during container image pull (CVE-2020-8945)
• 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):

• Whitelist statx(2) in docker (BZ#1784228)
• Upgrading docker resulting into increase Systemd logs (BZ#1791870)
• docker should be linked against gpgme-pthread (BZ#1792243)
• docker cannot be updated to 108 on rhos13 as a container fails to start with "pivot_root invalid argument" error. (BZ#1795376)
• OVS pods are unable to stop when running under docker version 1.13.1-108 (BZ#1796451)

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

Fixes

• BZ - 1757214 - CVE-2019-16884 runc: AppArmor/SELinux bypass with malicious image that specifies a volume at /proc
• BZ - 1784228 - Whitelist statx(2) in docker
• BZ - 1792796 - CVE-2020-1702 containers/image: Container images read entire image manifest into memory
• BZ - 1795376 - docker cannot be updated to 108 on rhos13 as a container fails to start with "pivot_root invalid argument" error.
• BZ - 1795838 - CVE-2020-8945 proglottis/gpgme: Use-after-free in GPGME bindings during container image pull
• BZ - 1796451 - OVS pods are unable to stop when running under docker version 1.13.1-108

CVEs

• CVE-2019-16884
• CVE-2020-1702
• CVE-2020-8945

References

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