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Red Hat Security Advisory 2020-3803-01

Red Hat Security Advisory 2020-3803-01
Posted Sep 22, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-3803-01 - The bash packages provide Bash, which is the default shell for Red Hat Enterprise Linux.

tags | advisory, shell, bash
systems | linux, redhat
advisories | CVE-2019-9924
SHA-256 | d6f38e216c1e79df65073c477e0b9f6950a67b9786832a4007ce8a159d249021

Red Hat Security Advisory 2020-3803-01

Change Mirror Download
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====================================================================
Red Hat Security Advisory

Synopsis: Moderate: bash security update
Advisory ID: RHSA-2020:3803-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:3803
Issue date: 2020-09-22
CVE Names: CVE-2019-9924
====================================================================
1. Summary:

An update for bash is now available for Red Hat Enterprise Linux 7.4
Advanced Update Support, Red Hat Enterprise Linux 7.4 Telco Extended Update
Support, and Red Hat Enterprise Linux 7.4 Update Services for SAP
Solutions.

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.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Server AUS (v. 7.4) - x86_64
Red Hat Enterprise Linux Server E4S (v. 7.4) - ppc64le, x86_64
Red Hat Enterprise Linux Server Optional AUS (v. 7.4) - x86_64
Red Hat Enterprise Linux Server Optional E4S (v. 7.4) - ppc64le, x86_64
Red Hat Enterprise Linux Server Optional TUS (v. 7.4) - x86_64
Red Hat Enterprise Linux Server TUS (v. 7.4) - x86_64

3. Description:

The bash packages provide Bash (Bourne-again shell), which is the default
shell for Red Hat Enterprise Linux.

Security Fix(es):

* bash: BASH_CMD is writable in restricted bash shells (CVE-2019-9924)

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/):

1691774 - CVE-2019-9924 bash: BASH_CMD is writable in restricted bash shells

6. Package List:

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

Source:
bash-4.2.46-30.el7_4.src.rpm

x86_64:
bash-4.2.46-30.el7_4.x86_64.rpm
bash-debuginfo-4.2.46-30.el7_4.x86_64.rpm

Red Hat Enterprise Linux Server E4S (v. 7.4):

Source:
bash-4.2.46-30.el7_4.src.rpm

ppc64le:
bash-4.2.46-30.el7_4.ppc64le.rpm
bash-debuginfo-4.2.46-30.el7_4.ppc64le.rpm

x86_64:
bash-4.2.46-30.el7_4.x86_64.rpm
bash-debuginfo-4.2.46-30.el7_4.x86_64.rpm

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

Source:
bash-4.2.46-30.el7_4.src.rpm

x86_64:
bash-4.2.46-30.el7_4.x86_64.rpm
bash-debuginfo-4.2.46-30.el7_4.x86_64.rpm

Red Hat Enterprise Linux Server Optional AUS (v. 7.4):

x86_64:
bash-debuginfo-4.2.46-30.el7_4.x86_64.rpm
bash-doc-4.2.46-30.el7_4.x86_64.rpm

Red Hat Enterprise Linux Server Optional E4S (v. 7.4):

ppc64le:
bash-debuginfo-4.2.46-30.el7_4.ppc64le.rpm
bash-doc-4.2.46-30.el7_4.ppc64le.rpm

x86_64:
bash-debuginfo-4.2.46-30.el7_4.x86_64.rpm
bash-doc-4.2.46-30.el7_4.x86_64.rpm

Red Hat Enterprise Linux Server Optional TUS (v. 7.4):

x86_64:
bash-debuginfo-4.2.46-30.el7_4.x86_64.rpm
bash-doc-4.2.46-30.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-2019-9924
https://access.redhat.com/security/updates/classification/#moderate

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2020 Red Hat, Inc.
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