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Red Hat Enterprise Linux 8 RHSA-2021:1723-01 Low: Sudo Issue Fix

red hat
Calendar Grey May 18, 2021
Dist Redhat Esm H88
A new advisory for Red Hat Enterprise Linux 8 highlights an update for the sudo package, addressing security vulnerabilities and bugs to boost system stability and performance
An update for sudo 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 sudo packages contain the sudo utility which allows system administrators to provide certain users with the permission to execute privileged commands, which are used for system management purposes, without having to log in as root.
Security Fix(es):
* sudo: symbolic link attack in SELinux-enabled sudoedit (CVE-2021-23240)
* sudo: possible directory existence test due to race condition in sudoedit (CVE-2021-23239)
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 security update security issue system management bug fix security fix Red Hat Enterprise Linux sudo SELinux low severity low impact sudo update

References

https://access.redhat.com/security/cve/CVE-2021-23239 https://access.redhat.com/security/cve/CVE-2021-23240 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: sudo-1.8.29-7.el8.src.rpm
aarch64: sudo-1.8.29-7.el8.aarch64.rpm sudo-debuginfo-1.8.29-7.el8.aarch64.rpm sudo-debugsource-1.8.29-7.el8.aarch64.rpm
ppc64le: sudo-1.8.29-7.el8.ppc64le.rpm sudo-debuginfo-1.8.29-7.el8.ppc64le.rpm sudo-debugsource-1.8.29-7.el8.ppc64le.rpm
s390x: sudo-1.8.29-7.el8.s390x.rpm sudo-debuginfo-1.8.29-7.el8.s390x.rpm sudo-debugsource-1.8.29-7.el8.s390x.rpm
x86_64: sudo-1.8.29-7.el8.x86_64.rpm sudo-debuginfo-1.8.29-7.el8.x86_64.rpm sudo-debugsource-1.8.29-7.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-2021:1723-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:1723
Issue date: 2021-05-18

Topic

An update for sudo 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 security update security issue system management bug fix security fix Red Hat Enterprise Linux sudo SELinux low severity low impact sudo update

Relevant Releases Architectures

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

Bugs Fixed

1915052 - CVE-2021-23239 sudo: possible directory existence test due to race condition in sudoedit

1915053 - CVE-2021-23240 sudo: symbolic link attack in SELinux-enabled sudoedit

1923825 - Upstream URL need to be updated

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