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RedHat: RHSA-2020-3803-01 Moderate: Bash Writable Cmd Security Issue

red hat
Calendar Grey September 22, 2020
Dist Redhat Esm H88
Important bash revision for Red Hat resolves modifiable command vulnerability. Keep your systems protected by applying the newest update.
An update for bash is now available for Red Hat Enterprise Linux 7.4 Advanced Update Support, Red Hat Enterprise Linux 7.4 Telco Extended Update Support, and Red Hat Enterprise Lin...

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: BASH_CMD is writable in restricted bash shells (CVE-2019-9924)
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.

Topics%20covered

Topics Covered

security advisory moderate security update red hat bash

References

https://access.redhat.com/security/cve/CVE-2019-9924 https://access.redhat.com/security/updates/classification/#moderate

Package List

Red Hat Enterprise Linux Server AUS (v. 7.4):
Source: bash-4.2.46-30.el7_4.src.rpm
x86_64: bash-4.2.46-30.el7_4.x86_64.rpm bash-debuginfo-4.2.46-30.el7_4.x86_64.rpm
Red Hat Enterprise Linux Server E4S (v. 7.4):
Source: bash-4.2.46-30.el7_4.src.rpm
ppc64le: bash-4.2.46-30.el7_4.ppc64le.rpm bash-debuginfo-4.2.46-30.el7_4.ppc64le.rpm
x86_64: bash-4.2.46-30.el7_4.x86_64.rpm bash-debuginfo-4.2.46-30.el7_4.x86_64.rpm
Red Hat Enterprise Linux Server TUS (v. 7.4):
Source: bash-4.2.46-30.el7_4.src.rpm
x86_64: bash-4.2.46-30.el7_4.x86_64.rpm bash-debuginfo-4.2.46-30.el7_4.x86_64.rpm
Red Hat Enterprise Linux Server Optional AUS (v. 7.4):
x86_64: bash-debuginfo-4.2.46-30.el7_4.x86_64.rpm bash-doc-4.2.46-30.el7_4.x86_64.rpm
Red Hat Enterprise Linux Server Optional E4S (v. 7.4):
ppc64le: bash-debuginfo-4.2.46-30.el7_4.ppc64le.rpm bash-doc-4.2.46-30.el7_4.ppc64le.rpm
x86_64: bash-debuginfo-4.2.46-30.el7_4.x86_64.rpm bash-doc-4.2.46-30.el7_4.x86_64.rpm
Red Hat Enterprise Linux Server Optional TUS (v. 7.4):
x86_64: bash-debuginfo-4.2.46-30.el7_4.x86_64.rpm bash-doc-4.2.46-30.el7_4.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/


Advisory ID: RHSA-2020:3803-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:3803
Issue date: 2020-09-22

Topic

An update for bash is now available for Red Hat Enterprise Linux 7.4Advanced Update Support, Red Hat Enterprise Linux 7.4 Telco Extended UpdateSupport, and Red Hat Enterprise Linux 7.4 Update Services for SAPSolutions.Red Hat Product Security has rated this update as having a security impactof Moderate. 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 moderate security update red hat bash

Relevant Releases Architectures

Red Hat Enterprise Linux Server AUS (v. 7.4) - x86_64

Red Hat Enterprise Linux Server E4S (v. 7.4) - ppc64le, x86_64

Red Hat Enterprise Linux Server Optional AUS (v. 7.4) - x86_64

Red Hat Enterprise Linux Server Optional E4S (v. 7.4) - ppc64le, x86_64

Red Hat Enterprise Linux Server Optional TUS (v. 7.4) - x86_64

Red Hat Enterprise Linux Server TUS (v. 7.4) - x86_64

Bugs Fixed

1691774 - CVE-2019-9924 bash: BASH_CMD is writable in restricted bash shells

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