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AUSCERT External Security Bulletin Redistribution
ESB-2020.0988
zsh security update
20 March 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: zsh
Publisher: Red Hat
Operating System: Red Hat Enterprise Linux Server 8
Red Hat Enterprise Linux WS/Desktop 8
Impact/Access: Access Privileged Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2019-20044
Reference: ESB-2020.0952
Original Bulletin:
https://access.redhat.com/errata/RHSA-2020:0903
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Red Hat Security Advisory
Synopsis: Important: zsh security update
Advisory ID: RHSA-2020:0903-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:0903
Issue date: 2020-03-19
CVE Names: CVE-2019-20044
=====================================================================
1. Summary:
An update for zsh is now available for Red Hat Enterprise Linux 8.
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 AppStream (v. 8) - noarch
Red Hat Enterprise Linux BaseOS (v. 8) - aarch64, ppc64le, s390x, x86_64
3. Description:
The zsh shell is a command interpreter usable as an interactive login shell
and as a shell script command processor. Zsh resembles the ksh shell (the
Korn shell), but includes many enhancements. Zsh supports command-line
editing, built-in spelling correction, programmable command completion,
shell functions (with autoloading), a history mechanism, and more.
Security Fix(es):
* zsh: insecure dropping of privileges when unsetting PRIVILEGED option
(CVE-2019-20044)
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/):
1804859 - CVE-2019-20044 zsh: insecure dropping of privileges when unsetting PRIVILEGED option
6. Package List:
Red Hat Enterprise Linux AppStream (v. 8):
noarch:
zsh-html-5.5.1-6.el8_1.2.noarch.rpm
Red Hat Enterprise Linux BaseOS (v. 8):
Source:
zsh-5.5.1-6.el8_1.2.src.rpm
aarch64:
zsh-5.5.1-6.el8_1.2.aarch64.rpm
zsh-debuginfo-5.5.1-6.el8_1.2.aarch64.rpm
zsh-debugsource-5.5.1-6.el8_1.2.aarch64.rpm
ppc64le:
zsh-5.5.1-6.el8_1.2.ppc64le.rpm
zsh-debuginfo-5.5.1-6.el8_1.2.ppc64le.rpm
zsh-debugsource-5.5.1-6.el8_1.2.ppc64le.rpm
s390x:
zsh-5.5.1-6.el8_1.2.s390x.rpm
zsh-debuginfo-5.5.1-6.el8_1.2.s390x.rpm
zsh-debugsource-5.5.1-6.el8_1.2.s390x.rpm
x86_64:
zsh-5.5.1-6.el8_1.2.x86_64.rpm
zsh-debuginfo-5.5.1-6.el8_1.2.x86_64.rpm
zsh-debugsource-5.5.1-6.el8_1.2.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-2019-20044
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 2020 Red Hat, Inc.
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