A bash security and bug fix update has been released for Red Hat Enterprise Linux 8.
RHSA-2021:1679-01: Low: bash security and bug fix update
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Red Hat Security Advisory
Synopsis: Low: bash security and bug fix update
Advisory ID: RHSA-2021:1679-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:1679
Issue date: 2021-05-18
CVE Names: CVE-2019-18276
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1. Summary:
An update for bash is now available for Red Hat Enterprise Linux 8.
Red Hat Product Security has rated this update as having a security impact
of Low. 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 BaseOS (v. 8) - aarch64, ppc64le, s390x, 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: when effective UID is not equal to its real UID the saved UID is
not dropped (CVE-2019-18276)
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.
Additional Changes:
For detailed information on changes in this release, see the Red Hat
Enterprise Linux 8.4 Release Notes linked from 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/):
1778309 - CVE-2019-18276 bash: when effective UID is not equal to its real UID the saved UID is not dropped
1890888 - Took long time to return when bash -c 'exit 2 & wait $!' run in the big size LimitNPROC values
6. Package List:
Red Hat Enterprise Linux BaseOS (v. 8):
Source:
bash-4.4.19-14.el8.src.rpm
aarch64:
bash-4.4.19-14.el8.aarch64.rpm
bash-debuginfo-4.4.19-14.el8.aarch64.rpm
bash-debugsource-4.4.19-14.el8.aarch64.rpm
bash-doc-4.4.19-14.el8.aarch64.rpm
ppc64le:
bash-4.4.19-14.el8.ppc64le.rpm
bash-debuginfo-4.4.19-14.el8.ppc64le.rpm
bash-debugsource-4.4.19-14.el8.ppc64le.rpm
bash-doc-4.4.19-14.el8.ppc64le.rpm
s390x:
bash-4.4.19-14.el8.s390x.rpm
bash-debuginfo-4.4.19-14.el8.s390x.rpm
bash-debugsource-4.4.19-14.el8.s390x.rpm
bash-doc-4.4.19-14.el8.s390x.rpm
x86_64:
bash-4.4.19-14.el8.x86_64.rpm
bash-debuginfo-4.4.19-14.el8.x86_64.rpm
bash-debugsource-4.4.19-14.el8.x86_64.rpm
bash-doc-4.4.19-14.el8.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-2019-18276
https://access.redhat.com/security/updates/classification/#low
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.4_release_notes/
8. Contact:
The Red Hat security contact is . More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2021 Red Hat, Inc.
