medium
4.1
CWE
863 732
Advisory Published
CVE Published
Updated

CVE-2020-25284

First published: Sun Sep 13 2020(Updated: )

A flaw was found in the capabilities check of the rados block device functionality in the Linux kernel. Incorrect capability checks could alllow a local user with root priviledges (but no capabilities) to add or remove Rados Block Devices from the system.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
redhat/kernel-rt<0:4.18.0-305.rt7.72.el8
0:4.18.0-305.rt7.72.el8
redhat/kernel<0:4.18.0-305.el8
0:4.18.0-305.el8
Linux Kernel<5.8.9
Debian=9.0
SUSE Linux=15.1
debian/linux
5.10.223-1
5.10.234-1
6.1.123-1
6.1.128-1
6.12.12-1
6.12.17-1

Remedy

As the rbd module can be loaded by a priviledged user or process, its use can be disabled by preventing the module from loading with the following instructions: # echo "install rbd /bin/true" >> /etc/modprobe.d/disable-rdb.conf The system will need to be restarted if the modules isloaded. In most circumstances, the rbd kernel modules will be unable to be unloaded while in use. If the system requires this module to work correctly, (Such as a CEPH node) this mitigation may not be suitable. If you need further assistance, see KCS article https://access.redhat.com/solutions/41278 or contact Red Hat Global Support Services.

Remedy

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f44d04e696feaf13d192d942c4f14ad2e117065a

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the severity of CVE-2020-25284?

    CVE-2020-25284 has been classified as having a high severity level due to its potential to allow unauthorized manipulation of Rados Block Devices.

  • How do I fix CVE-2020-25284?

    To mitigate CVE-2020-25284, upgrade to the specific patched versions of the kernel packages as provided by your Linux distribution.

  • Who is affected by CVE-2020-25284?

    Users running vulnerable versions of the Linux kernel or specific distributions like Red Hat, Debian, or openSUSE are affected by CVE-2020-25284.

  • What are the impacted Linux kernel versions in CVE-2020-25284?

    CVE-2020-25284 affects Linux kernel versions prior to 5.8.9 as well as specific packaged versions in various distributions.

  • Can CVE-2020-25284 be exploited remotely?

    CVE-2020-25284 requires local root privileges for exploitation, therefore it cannot be exploited remotely.

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