RedHat: RHSA-2020-0978:01 Important: zsh security update
Summary
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.
Summary
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
References
https://access.redhat.com/security/cve/CVE-2019-20044 https://access.redhat.com/security/updates/classification/#important
Package List
Red Hat Enterprise Linux AppStream E4S (v. 8.0):
noarch:
zsh-html-5.5.1-6.el8_0.2.noarch.rpm
Red Hat Enterprise Linux BaseOS E4S (v. 8.0):
Source:
zsh-5.5.1-6.el8_0.2.src.rpm
aarch64:
zsh-5.5.1-6.el8_0.2.aarch64.rpm
zsh-debuginfo-5.5.1-6.el8_0.2.aarch64.rpm
zsh-debugsource-5.5.1-6.el8_0.2.aarch64.rpm
ppc64le:
zsh-5.5.1-6.el8_0.2.ppc64le.rpm
zsh-debuginfo-5.5.1-6.el8_0.2.ppc64le.rpm
zsh-debugsource-5.5.1-6.el8_0.2.ppc64le.rpm
s390x:
zsh-5.5.1-6.el8_0.2.s390x.rpm
zsh-debuginfo-5.5.1-6.el8_0.2.s390x.rpm
zsh-debugsource-5.5.1-6.el8_0.2.s390x.rpm
x86_64:
zsh-5.5.1-6.el8_0.2.x86_64.rpm
zsh-debuginfo-5.5.1-6.el8_0.2.x86_64.rpm
zsh-debugsource-5.5.1-6.el8_0.2.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/
Topic
An update for zsh is now available for Red Hat Enterprise Linux 8.0 UpdateServices for SAP Solutions.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.
Topic
Relevant Releases Architectures
Red Hat Enterprise Linux AppStream E4S (v. 8.0) - noarch
Red Hat Enterprise Linux BaseOS E4S (v. 8.0) - aarch64, ppc64le, s390x, x86_64
Bugs Fixed
1804859 - CVE-2019-20044 zsh: insecure dropping of privileges when unsetting PRIVILEGED option
