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Red Hat: RHSA-2020-5441-01 Important: Kernel-Rt Security Fix

red hat
Calendar Grey December 15, 2020
Dist Redhat Esm H88
A kernel update has been released for Red Hat Enterprise Linux 7 to resolve critical security vulnerabilities and system bugs.
An update for kernel-rt is now available for Red Hat Enterprise Linux 7

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-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.
Security Fix(es):
* kernel: metadata validator in XFS may cause an inode with a valid, user-creatable extended attribute to be flagged as corrupt (CVE-2020-14385)
* kernel: The flow_dissector feature allows device tracking (CVE-2019-18282)
* kernel: Buffer over-read in crypto_authenc_extractkeys() when a payload longer than 4 bytes is not aligned. (CVE-2020-10769)
* kernel: buffer uses out of index in ext3/4 filesystem (CVE-2020-14314)
* kernel: umask not applied on filesystem without ACL support (CVE-2020-24394)
* kernel: TOCTOU mismatch in the NFS client code (CVE-2020-25212)
* kernel: improper input validation in ppp_cp_parse_cr function leads to memory corruption and read overflow (CVE-2020-25643)
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):
* kernel-rt: update to the latest RHEL7.9.z2 source tree (BZ#1873318)
* deadlock between handle_mm_fault() and ptep_clear_flush() (BZ#1888872)

Topics%20covered

Topics Covered

security advisory security issue buffer overflow critical bug fix memory corruption Red Hat Enterprise Linux important important fix kernel-rt

References

https://access.redhat.com/security/cve/CVE-2019-18282 https://access.redhat.com/security/cve/CVE-2020-10769 https://access.redhat.com/security/cve/CVE-2020-14314 https://access.redhat.com/security/cve/CVE-2020-14385 https://access.redhat.com/security/cve/CVE-2020-24394 https://access.redhat.com/security/cve/CVE-2020-25212 https://access.redhat.com/security/cve/CVE-2020-25643 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux for Real Time for NFV (v. 7):
Source: kernel-rt-3.10.0-1160.11.1.rt56.1145.el7.src.rpm
noarch: kernel-rt-doc-3.10.0-1160.11.1.rt56.1145.el7.noarch.rpm
x86_64: kernel-rt-3.10.0-1160.11.1.rt56.1145.el7.x86_64.rpm kernel-rt-debug-3.10.0-1160.11.1.rt56.1145.el7.x86_64.rpm kernel-rt-debug-debuginfo-3.10.0-1160.11.1.rt56.1145.el7.x86_64.rpm kernel-rt-debug-devel-3.10.0-1160.11.1.rt56.1145.el7.x86_64.rpm kernel-rt-debug-kvm-3.10.0-1160.11.1.rt56.1145.el7.x86_64.rpm kernel-rt-debug-kvm-debuginfo-3.10.0-1160.11.1.rt56.1145.el7.x86_64.rpm kernel-rt-debuginfo-3.10.0-1160.11.1.rt56.1145.el7.x86_64.rpm kernel-rt-debuginfo-common-x86_64-3.10.0-1160.11.1.rt56.1145.el7.x86_64.rpm kernel-rt-devel-3.10.0-1160.11.1.rt56.1145.el7.x86_64.rpm kernel-rt-kvm-3.10.0-1160.11.1.rt56.1145.el7.x86_64.rpm kernel-rt-kvm-debuginfo-3.10.0-1160.11.1.rt56.1145.el7.x86_64.rpm kernel-rt-trace-3.10.0-1160.11.1.rt56.1145.el7.x86_64.rpm kernel-rt-trace-debuginfo-3.10.0-1160.11.1.rt56.1145.el7.x86_64.rpm kernel-rt-trace-devel-3.10.0-1160.11.1.rt56.1145.el7.x86_64.rpm kernel-rt-trace-kvm-3.10.0-1160.11.1.rt56.1145.el7.x86_64.rpm kernel-rt-trace-kvm-debuginfo-3.10.0-1160.11.1.rt56.1145.el7.x86_64.rpm
Red Hat Enterprise Linux for Real Time (v. 7):
Source:

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2020:5441-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:5441
Issue date: 2020-12-15

Topic

An update for kernel-rt is now available for Red Hat Enterprise Linux 7.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory security issue buffer overflow critical bug fix memory corruption Red Hat Enterprise Linux important important fix kernel-rt

Relevant Releases Architectures

Red Hat Enterprise Linux for Real Time (v. 7) - noarch, x86_64

Red Hat Enterprise Linux for Real Time for NFV (v. 7) - noarch, x86_64

Bugs Fixed

1708775 - CVE-2020-10769 kernel: Buffer over-read in crypto_authenc_extractkeys() when a payload longer than 4 bytes is not aligned.

1796360 - CVE-2019-18282 kernel: The flow_dissector feature allows device tracking

1853922 - CVE-2020-14314 kernel: buffer uses out of index in ext3/4 filesystem

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

1874800 - CVE-2020-14385 kernel: metadata validator in XFS may cause an inode with a valid, user-creatable extended attribute to be flagged as corrupt

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

1879981 - CVE-2020-25643 kernel: improper input validation in ppp_cp_parse_cr function leads to memory corruption and read overflow

1888872 - deadlock between handle_mm_fault() and ptep_clear_flush() [rhel-7.9.z]

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