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Red Hat Enterprise Linux 8 RHSA-2021:1679-01 Low: Bash Bug Fix

red hat
Calendar Grey May 18, 2021
Dist Redhat Esm H88
An update for Bash on Red Hat Enterprise Linux 8 resolves a minor severity concern, enhancing overall system integrity and performance.
An update for bash is now available for Red Hat Enterprise Linux 8

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

Summary

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.

Topics%20covered

Topics Covered

security advisory bug fix Red Hat Enterprise Linux low severity security impact bash fix shell security

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/

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/


Severity
low
Lowest
Low
Medium
High
Critical

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

Topic

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 impactof Low. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory bug fix Red Hat Enterprise Linux low severity security impact bash fix shell security

Relevant Releases Architectures

Red Hat Enterprise Linux BaseOS (v. 8) - aarch64, ppc64le, s390x, x86_64

Bugs Fixed

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

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