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Red Hat Enterprise Linux 8: RHSA-2021-4404 Low: Kexec-Tools Update

red hat
Calendar Grey November 9, 2021
Dist Redhat Esm H88
A new version issued for kexec-tools on Red Hat Enterprise Linux 8 presenting minimal security risk. Get the specifics today.
An update for kexec-tools 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 kexec-tools packages contain the /sbin/kexec binary and utilities that together form the user-space component of the kernel's kexec feature. The /sbin/kexec binary facilitates a new kernel to boot using the kernel's kexec feature either on a normal or a panic reboot. The kexec fastboot mechanism allows booting a Linux kernel from the context of an already running kernel.
Security Fix(es):
* kexec-tools: incorrect permissions on kdump dmesg file (CVE-2021-20269)
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 8.5 Release Notes linked from the References section.

Topics%20covered

Topics Covered

security advisory software update bug fix Red Hat Enterprise Linux low severity security impact kexec-tools

References

https://access.redhat.com/security/cve/CVE-2021-20269 https://access.redhat.com/security/updates/classification#low https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/8/html/8.5_release_notes/index

Package List

Red Hat Enterprise Linux BaseOS (v. 8):
Source: kexec-tools-2.0.20-57.el8.src.rpm
aarch64: kexec-tools-2.0.20-57.el8.aarch64.rpm kexec-tools-debuginfo-2.0.20-57.el8.aarch64.rpm kexec-tools-debugsource-2.0.20-57.el8.aarch64.rpm
ppc64le: kexec-tools-2.0.20-57.el8.ppc64le.rpm kexec-tools-debuginfo-2.0.20-57.el8.ppc64le.rpm kexec-tools-debugsource-2.0.20-57.el8.ppc64le.rpm
s390x: kexec-tools-2.0.20-57.el8.s390x.rpm kexec-tools-debuginfo-2.0.20-57.el8.s390x.rpm kexec-tools-debugsource-2.0.20-57.el8.s390x.rpm
x86_64: kexec-tools-2.0.20-57.el8.x86_64.rpm kexec-tools-debuginfo-2.0.20-57.el8.x86_64.rpm kexec-tools-debugsource-2.0.20-57.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-2021:4404-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:4404
Issue date: 2021-11-09

Topic

An update for kexec-tools 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 software update bug fix Red Hat Enterprise Linux low severity security impact kexec-tools

Relevant Releases Architectures

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

Bugs Fixed

1892558 - kdump: provide a library API to export suggested crashkernel reservation values

1915819 - perror_exit call inside check_user_configured_target() function is not providing absolute path of dump location upon kdump service failure.

1918499 - kdump initrd generation fails if /boot not writable

1934261 - CVE-2021-20269 kexec-tools: incorrect permissions on kdump dmesg file

1965267 - [RHEL-8.5][ppc64le] makedumpfile failed to copy /proc/kcore that 'get_mm_sparsemem: Can't get the address of mem_section' or output nothing

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