RedHat: RHSA-2021-1679:01 Low: bash security and bug fix update
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.
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-2019-18276 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/
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.
Topic
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