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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Important: patch security update
Advisory ID:       RHSA-2018:2091-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2018:2091
Issue date:        2018-06-27
CVE Names:         CVE-2018-1000156 
=====================================================================

1. Summary:

An update for patch is now available for Red Hat Enterprise Linux 7.4
Extended Update Support.

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 ComputeNode EUS (v. 7.4) - x86_64
Red Hat Enterprise Linux Server EUS (v. 7.4) - aarch64, ppc64, ppc64le, s390x, x86_64

3. Description:

The patch program applies diff files to originals. The diff command is used
to compare an original to a changed file. Diff lists the changes made to
the file. A person who has the original file can then use the patch command
with the diff file to add the changes to their original file (patching the
file).

Security Fix(es):

* patch: Malicious patch files cause ed to execute arbitrary commands
(CVE-2018-1000156)

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

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/):

1564326 - CVE-2018-1000156 patch: Malicious patch files cause ed to execute arbitrary commands

6. Package List:

Red Hat Enterprise Linux ComputeNode EUS (v. 7.4):

Source:
patch-2.7.1-10.el7_4.src.rpm

x86_64:
patch-2.7.1-10.el7_4.x86_64.rpm
patch-debuginfo-2.7.1-10.el7_4.x86_64.rpm

Red Hat Enterprise Linux Server EUS (v. 7.4):

Source:
patch-2.7.1-10.el7_4.src.rpm

aarch64:
patch-2.7.1-10.el7_4.aarch64.rpm
patch-debuginfo-2.7.1-10.el7_4.aarch64.rpm

ppc64:
patch-2.7.1-10.el7_4.ppc64.rpm
patch-debuginfo-2.7.1-10.el7_4.ppc64.rpm

ppc64le:
patch-2.7.1-10.el7_4.ppc64le.rpm
patch-debuginfo-2.7.1-10.el7_4.ppc64le.rpm

s390x:
patch-2.7.1-10.el7_4.s390x.rpm
patch-debuginfo-2.7.1-10.el7_4.s390x.rpm

x86_64:
patch-2.7.1-10.el7_4.x86_64.rpm
patch-debuginfo-2.7.1-10.el7_4.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-2018-1000156
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 2018 Red Hat, Inc.
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