Incorrect permission assignment for critical resource in libvirt - CVE-2021-3631

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Main Vulnerability Database Vulnerabilities #VU62735

Incorrect permission assignment for critical resource in libvirt - CVE-2021-3631

Published: May 3, 2022


Vulnerability identifier: #VU62735
CSH Severity: Medium
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-3631
CWE-ID: CWE-732
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to an error in the way SELinux MCS category pairs for VMs' dynamic labels in security/security_selinux.c. An attacker with access to the guest OS can access files labeled for another guest.


Affected software

libvirt
Gentoo Linux
Oracle Linux
SUSE MicroOS
Red Hat CodeReady Linux Builder for ARM 64
Red Hat CodeReady Linux Builder for Power, little endian
Red Hat CodeReady Linux Builder for x86_64
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for x86_64
Red Hat CodeReady Linux Builder for IBM z Systems
SUSE Linux Enterprise Module for Basesystem
SUSE Linux Enterprise Module for Server Applications
Ubuntu
openEuler
Fedora
libvirt-daemon (Ubuntu package)
libvirt-daemon-system (Ubuntu package)
libvirt0 (Ubuntu package)
libvirt-daemon-config-nwfilter
libvirt-daemon-driver-storage-rbd-debuginfo
libvirt-client-debuginfo
libvirt-client
libvirt-admin-debuginfo
libvirt-admin
libvirt
libvirt-libs-debuginfo
libvirt-libs
libvirt-debugsource
libvirt-daemon-qemu
libvirt-daemon-driver-storage-scsi-debuginfo
libvirt-daemon-driver-storage-scsi
libvirt-daemon-config-network
libvirt-daemon-driver-lxc
libvirt-daemon-driver-lxc-debuginfo
libvirt-daemon-hooks
libvirt-daemon-lxc
libvirt-devel
libvirt-lock-sanlock
libvirt-lock-sanlock-debuginfo
libvirt-nss
libvirt-nss-debuginfo
libvirt-bash-completion
libvirt-doc
libvirt-daemon-driver-libxl
libvirt-daemon-driver-libxl-debuginfo
libvirt-daemon-xen
libvirt-daemon-driver-storage-mpath-debuginfo
libvirt-daemon
libvirt-daemon-debuginfo
libvirt-daemon-driver-interface
libvirt-daemon-driver-interface-debuginfo
libvirt-daemon-driver-network
libvirt-daemon-driver-network-debuginfo
libvirt-daemon-driver-nodedev
libvirt-daemon-driver-nodedev-debuginfo
libvirt-daemon-driver-nwfilter
libvirt-daemon-driver-nwfilter-debuginfo
libvirt-daemon-driver-qemu
libvirt-daemon-driver-qemu-debuginfo
libvirt-daemon-driver-secret
libvirt-daemon-driver-secret-debuginfo
libvirt-daemon-driver-storage-rbd
libvirt-daemon-driver-storage-mpath
libvirt-daemon-driver-storage-logical-debuginfo
libvirt-daemon-driver-storage-logical
libvirt-daemon-driver-storage-iscsi-debuginfo
libvirt-daemon-driver-storage-iscsi
libvirt-daemon-driver-storage-disk-debuginfo
libvirt-daemon-driver-storage-disk
libvirt-daemon-driver-storage-core-debuginfo
libvirt-daemon-driver-storage-core
libvirt-daemon-driver-storage
libvirt-daemon-driver-storage-gluster
libvirt-debuginfo
libvirt-daemon-kvm
libvirt-daemon-driver-storage-iscsi-direct
libvirt-wireshark
libvirt-docs
libvirt-daemon-driver-storage-iscsi-direct-debuginfo
app-emulation/libvirt
dev-python/libvirt-python

How to mitigate CVE-2021-3631

Install updates from vendor's website.

libvirt - update to 7.5.0
libvirt-daemon (Ubuntu package) - addressed in versions 4.0.0-1ubuntu8.21, 6.0.0-0ubuntu8.16, 7.6.0-0ubuntu1.2
libvirt-daemon-system (Ubuntu package) - addressed in versions 4.0.0-1ubuntu8.21, 6.0.0-0ubuntu8.16, 7.6.0-0ubuntu1.2
libvirt0 (Ubuntu package) - addressed in versions 4.0.0-1ubuntu8.21, 6.0.0-0ubuntu8.16, 7.6.0-0ubuntu1.2
libvirt-daemon-config-nwfilter - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-daemon-driver-storage-rbd-debuginfo - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-client-debuginfo - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-client - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-admin-debuginfo - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-admin - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-libs-debuginfo - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-libs - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-debugsource - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-daemon-qemu - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-daemon-driver-storage-scsi-debuginfo - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-daemon-driver-storage-scsi - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-daemon-config-network - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-daemon-driver-lxc - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-daemon-driver-lxc-debuginfo - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-daemon-hooks - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-daemon-lxc - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-devel - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-lock-sanlock - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-lock-sanlock-debuginfo - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-nss - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-nss-debuginfo - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-bash-completion - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-doc - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-daemon-driver-libxl - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-daemon-driver-libxl-debuginfo - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-daemon-xen - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-daemon-driver-storage-mpath-debuginfo - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-daemon - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-daemon-debuginfo - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-daemon-driver-interface - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-daemon-driver-interface-debuginfo - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-daemon-driver-network - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-daemon-driver-network-debuginfo - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-daemon-driver-nodedev - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-daemon-driver-nodedev-debuginfo - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-daemon-driver-nwfilter - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-daemon-driver-nwfilter-debuginfo - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-daemon-driver-qemu - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-daemon-driver-qemu-debuginfo - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-daemon-driver-secret - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-daemon-driver-secret-debuginfo - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-daemon-driver-storage-rbd - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-daemon-driver-storage-mpath - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-daemon-driver-storage-logical-debuginfo - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-daemon-driver-storage-logical - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-daemon-driver-storage-iscsi-debuginfo - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-daemon-driver-storage-iscsi - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-daemon-driver-storage-disk-debuginfo - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-daemon-driver-storage-disk - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-daemon-driver-storage-core-debuginfo - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-daemon-driver-storage-core - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-daemon-driver-storage - addressed in versions 6.0.0-13.16.2, 7.1.0-6.5.1
libvirt-daemon-driver-secret - update to 6.2.0-13
libvirt-daemon-driver-nwfilter - update to 6.2.0-13
libvirt-daemon-driver-storage-disk - update to 6.2.0-13
libvirt-daemon-driver-storage-gluster - update to 6.2.0-13
libvirt-daemon-driver-interface - update to 6.2.0-13
libvirt-devel - update to 6.2.0-13
libvirt-daemon-driver-storage-logical - update to 6.2.0-13
libvirt-bash-completion - update to 6.2.0-13
libvirt-admin - update to 6.2.0-13
libvirt-debuginfo - update to 6.2.0-13
libvirt-client - update to 6.2.0-13
libvirt-daemon-kvm - update to 6.2.0-13
libvirt-daemon-qemu - update to 6.2.0-13
libvirt-nss - update to 6.2.0-13
libvirt-daemon-driver-qemu - update to 6.2.0-13
libvirt-daemon-driver-storage-iscsi-direct - update to 6.2.0-13
libvirt - update to 6.2.0-13
libvirt-daemon-driver-storage-core - update to 6.2.0-13
libvirt-wireshark - update to 6.2.0-13
libvirt-daemon-driver-storage-mpath - update to 6.2.0-13
libvirt-daemon-config-nwfilter - update to 6.2.0-13
libvirt-daemon-driver-storage-rbd - update to 6.2.0-13
libvirt-daemon - update to 6.2.0-13
libvirt-daemon-driver-storage - update to 6.2.0-13
libvirt-daemon-driver-network - update to 6.2.0-13
libvirt-lock-sanlock - update to 6.2.0-13
libvirt-daemon-config-network - update to 6.2.0-13
libvirt-daemon-driver-storage-iscsi - update to 6.2.0-13
libvirt-debugsource - update to 6.2.0-13
libvirt-libs - update to 6.2.0-13
libvirt-daemon-driver-storage-scsi - update to 6.2.0-13
libvirt-daemon-driver-nodedev - update to 6.2.0-13
libvirt-docs - update to 6.2.0-13
libvirt - update to 7.0.0-6.fc34
libvirt-daemon-driver-storage-iscsi-direct-debuginfo - update to 7.1.0-6.5.1
libvirt-daemon-driver-storage-iscsi-direct - update to 7.1.0-6.5.1
app-emulation/libvirt - update to 8.2.0
dev-python/libvirt-python - update to 8.2.0

External References

Related Security Bulletins