RHSA-2015:0776 - Security Advisory

Topic

Updated docker packages that fix one security issue are now available for
Red Hat Enterprise Linux 7 Extras.

Red Hat Product Security has rated this update as having Moderate security
impact. Common Vulnerability Scoring System (CVSS) base scores, which give
detailed severity ratings, are available for each vulnerability from the
CVE links in the References section.

Description

Docker is a service providing container management on Linux.

It was found that the fix for the CVE-2014-5277 issue was incomplete: the
docker client could under certain circumstances erroneously fall back to
HTTP when an HTTPS connection to a registry failed. This could allow a
man-in-the-middle attacker to obtain authentication and image data from
traffic sent from a client to the registry. (CVE-2015-1843)

Red Hat would like to thank Eric Windisch of Docker Inc. for reporting
this issue.

All docker users are advised to upgrade to these updated packages, which
correct this issue.

Solution

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat Enterprise Linux Server 7 x86_64
• Red Hat Enterprise Linux Server from RHUI 7 x86_64

Fixes

• BZ - 1206443 - CVE-2015-1843 docker: regression of CVE-2014-5277

CVEs

• CVE-2015-1843

References

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