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Red Hat Enterprise Linux 7.4 Moderate: RHSA-2021-0760-01 Kernel Update

red hat
Calendar Grey March 9, 2021
Dist Redhat Esm H88
Debian issued an important kernel patch focusing on various vulnerabilities, notably affecting Samba and permissions settings.
An update for kernel 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 L...

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

The system must be rebooted for this update to take effect.

Summary

The kernel packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
* kernel: umask not applied on filesystem without ACL support (CVE-2020-24394)
* kernel: TOCTOU mismatch in the NFS client code (CVE-2020-25212)
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.
Bug Fix(es):
* Security patch for CVE-2020-25212 breaks directory listings via 'ls' on NFS V4.2 shares mounted with selinux enabled labels (BZ#1919141)

Topics%20covered

Topics Covered

security advisory moderate Red Hat kernel update bug fix Red Hat Enterprise Linux moderate severity kernel NFS issue umask issue umask bug

References

https://access.redhat.com/security/cve/CVE-2020-24394 https://access.redhat.com/security/cve/CVE-2020-25212 https://access.redhat.com/security/updates/classification/#moderate

Package List

Red Hat Enterprise Linux Server AUS (v. 7.4):
Source: kernel-3.10.0-693.82.1.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-693.82.1.el7.noarch.rpm kernel-doc-3.10.0-693.82.1.el7.noarch.rpm
x86_64: kernel-3.10.0-693.82.1.el7.x86_64.rpm kernel-debug-3.10.0-693.82.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-693.82.1.el7.x86_64.rpm kernel-debug-devel-3.10.0-693.82.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-693.82.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-693.82.1.el7.x86_64.rpm kernel-devel-3.10.0-693.82.1.el7.x86_64.rpm kernel-headers-3.10.0-693.82.1.el7.x86_64.rpm kernel-tools-3.10.0-693.82.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-693.82.1.el7.x86_64.rpm kernel-tools-libs-3.10.0-693.82.1.el7.x86_64.rpm perf-3.10.0-693.82.1.el7.x86_64.rpm perf-debuginfo-3.10.0-693.82.1.el7.x86_64.rpm python-perf-3.10.0-693.82.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-693.82.1.el7.x86_64.rpm
Red Hat Enterprise Linux Server E4S (v. 7.4):
Source: kernel-3.10.0-693.82.1.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-693.82.1.el7.noarch.rpm kernel-doc-3.10.0-693.82.1.el7.noarch.rpm
ppc64le: kernel-3.10.0-693.82.1.el7.ppc64le.rpm kernel-bootwrapper-3.10.0-693.82.1.el7.ppc64le.rpm kernel-debug-3.10.0-693.82.1.el7.ppc64le.rpm

Read the Full Advisory


Advisory ID: RHSA-2021:0760-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:0760
Issue date: 2021-03-09

Topic

An update for kernel 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 Red Hat kernel update bug fix Red Hat Enterprise Linux moderate severity kernel NFS issue umask issue umask bug

Relevant Releases Architectures

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

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

Bugs Fixed

1869141 - CVE-2020-24394 kernel: umask not applied on filesystem without ACL support

1877575 - CVE-2020-25212 kernel: TOCTOU mismatch in the NFS client code

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