Security Bulletin
This security bulletin contains one low risk vulnerability.
EUVDB-ID: #VU62734
Risk: Low
CVSSv3.1: 2.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-3667
CWE-ID:
CWE-667 - Improper Locking
Exploit availability: No
DescriptionThe vulnerability allows a local user to perform a denial of service attack (DoS) on the target system.
The vulnerability exists due to double-locking error in the virStoragePoolLookupByTargetPath API in libvirt in storage/storage_driver.c. The storagePoolLookupByTargetPath() function does not properly release a locked object (virStoragePoolObj) on ACL permission failure. Clients connecting to the read-write socket with limited ACL permissions can use this vulnerability to acquire the lock and prevent other users from accessing storage pool/volume APIs. As a result a local user can perform a denial of service (DoS) attack.
MitigationUpdate the affected package libvirt to the latest version.
Vulnerable software versionsSUSE Linux Enterprise Software Development Kit: 12-SP5
SUSE Linux Enterprise Server: 12-SP5
libvirt-daemon-xen: before 5.1.0-13.25.1
libvirt-daemon-driver-libxl-debuginfo: before 5.1.0-13.25.1
libvirt-daemon-driver-libxl: before 5.1.0-13.25.1
libvirt-daemon-driver-storage-rbd-debuginfo: before 5.1.0-13.25.1
libvirt-daemon-driver-storage-rbd: before 5.1.0-13.25.1
libvirt-nss-debuginfo: before 5.1.0-13.25.1
libvirt-nss: before 5.1.0-13.25.1
libvirt-lock-sanlock-debuginfo: before 5.1.0-13.25.1
libvirt-lock-sanlock: before 5.1.0-13.25.1
libvirt-libs-debuginfo: before 5.1.0-13.25.1
libvirt-libs: before 5.1.0-13.25.1
libvirt-doc: before 5.1.0-13.25.1
libvirt-daemon-qemu: before 5.1.0-13.25.1
libvirt-daemon-lxc: before 5.1.0-13.25.1
libvirt-daemon-hooks: before 5.1.0-13.25.1
libvirt-daemon-driver-storage-scsi-debuginfo: before 5.1.0-13.25.1
libvirt-daemon-driver-storage-scsi: before 5.1.0-13.25.1
libvirt-daemon-driver-storage-mpath-debuginfo: before 5.1.0-13.25.1
libvirt-daemon-driver-storage-mpath: before 5.1.0-13.25.1
libvirt-daemon-driver-storage-logical-debuginfo: before 5.1.0-13.25.1
libvirt-daemon-driver-storage-logical: before 5.1.0-13.25.1
libvirt-daemon-driver-storage-iscsi-debuginfo: before 5.1.0-13.25.1
libvirt-daemon-driver-storage-iscsi: before 5.1.0-13.25.1
libvirt-daemon-driver-storage-disk-debuginfo: before 5.1.0-13.25.1
libvirt-daemon-driver-storage-disk: before 5.1.0-13.25.1
libvirt-daemon-driver-storage-core-debuginfo: before 5.1.0-13.25.1
libvirt-daemon-driver-storage-core: before 5.1.0-13.25.1
libvirt-daemon-driver-storage: before 5.1.0-13.25.1
libvirt-daemon-driver-secret-debuginfo: before 5.1.0-13.25.1
libvirt-daemon-driver-secret: before 5.1.0-13.25.1
libvirt-daemon-driver-qemu-debuginfo: before 5.1.0-13.25.1
libvirt-daemon-driver-qemu: before 5.1.0-13.25.1
libvirt-daemon-driver-nwfilter-debuginfo: before 5.1.0-13.25.1
libvirt-daemon-driver-nwfilter: before 5.1.0-13.25.1
libvirt-daemon-driver-nodedev-debuginfo: before 5.1.0-13.25.1
libvirt-daemon-driver-nodedev: before 5.1.0-13.25.1
libvirt-daemon-driver-network-debuginfo: before 5.1.0-13.25.1
libvirt-daemon-driver-network: before 5.1.0-13.25.1
libvirt-daemon-driver-lxc-debuginfo: before 5.1.0-13.25.1
libvirt-daemon-driver-lxc: before 5.1.0-13.25.1
libvirt-daemon-driver-interface-debuginfo: before 5.1.0-13.25.1
libvirt-daemon-driver-interface: before 5.1.0-13.25.1
libvirt-daemon-debuginfo: before 5.1.0-13.25.1
libvirt-daemon-config-nwfilter: before 5.1.0-13.25.1
libvirt-daemon-config-network: before 5.1.0-13.25.1
libvirt-daemon: before 5.1.0-13.25.1
libvirt-client-debuginfo: before 5.1.0-13.25.1
libvirt-client: before 5.1.0-13.25.1
libvirt-admin-debuginfo: before 5.1.0-13.25.1
libvirt-admin: before 5.1.0-13.25.1
libvirt: before 5.1.0-13.25.1
libvirt-devel: before 5.1.0-13.25.1
libvirt-debugsource: before 5.1.0-13.25.1
External linkshttp://www.suse.com/support/update/announcement/2021/suse-su-20213277-1/
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.