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[RHSA-2019:3757-01] Important: patch security update



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

Synopsis:          Important: patch security update
Advisory ID:       RHSA-2019:3757-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2019:3757
Issue date:        2019-11-06
CVE Names:         CVE-2018-20969 CVE-2019-13638 
=====================================================================

1. Summary:

An update for patch is now available for Red Hat Enterprise Linux 7.5
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. 7.5) - x86_64
Red Hat Enterprise Linux Server EUS (v. 7.5) - 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: do_ed_script in pch.c does not block strings beginning with a !
character (CVE-2018-20969)

* patch: OS shell command injection when processing crafted patch files
(CVE-2019-13638)

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.

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/):

1733916 - CVE-2019-13638 patch: OS shell command injection when processing crafted patch files
1746672 - CVE-2018-20969 patch: do_ed_script in pch.c does not block strings beginning with a ! character

6. Package List:

Red Hat Enterprise Linux ComputeNode EUS (v. 7.5):

Source:
patch-2.7.1-11.el7_5.src.rpm

x86_64:
patch-2.7.1-11.el7_5.x86_64.rpm
patch-debuginfo-2.7.1-11.el7_5.x86_64.rpm

Red Hat Enterprise Linux Server EUS (v. 7.5):

Source:
patch-2.7.1-11.el7_5.src.rpm

ppc64:
patch-2.7.1-11.el7_5.ppc64.rpm
patch-debuginfo-2.7.1-11.el7_5.ppc64.rpm

ppc64le:
patch-2.7.1-11.el7_5.ppc64le.rpm
patch-debuginfo-2.7.1-11.el7_5.ppc64le.rpm

s390x:
patch-2.7.1-11.el7_5.s390x.rpm
patch-debuginfo-2.7.1-11.el7_5.s390x.rpm

x86_64:
patch-2.7.1-11.el7_5.x86_64.rpm
patch-debuginfo-2.7.1-11.el7_5.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-2018-20969
https://access.redhat.com/security/cve/CVE-2019-13638
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 2019 Red Hat, Inc.
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