QID 239789

Date Published: 2021-11-10

QID 239789: Red Hat Update for kexec-tools security (RHSA-2021:4404)

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)

Affected Products:

  • Red Hat enterprise linux for x86_64 8 x86_64
  • Red Hat enterprise linux for ibm z systems 8 s390x
  • Red Hat enterprise linux for power, little endian 8 ppc64le
  • Red Hat enterprise linux for arm 64 8 aarch64



Note: The preceding description block is extracted directly from the security advisory. Using automation, we have attempted to clean and format it as much as possible without introducing additional issues.

On successful exploitation, it could allow an attacker to execute code.

  • CVSS V3 rated as Medium - 4.2 severity.
  • CVSS V2 rated as Medium - 5.4 severity.
    • Solution
    Upgrade to the latest packages which contain a patch.

    Refer to Refer to :
    Applying Package Updates to RHEL system     for details.

    Refer to Red Hat security advisory RHSA-2021:4404 Update to address this issue and obtain more information.

    Vendor References

    CVEs related to QID 239789

    CVE-2021-20269 |
    Software Advisories
    Advisory ID Software Component Link
    RHSA-2021:4404 Red Hat Enterprise Linux URL Logo access.redhat.com/errata/RHSA-2021:4404
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