openEuler 20.03 LTS update for libvirt

1) Double Free

EUVDB-ID: #VU48591

Risk: Low

CVSSv3.1: 7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2020-25637

CWE-ID: CWE-415 - Double Free

Exploit availability: Yes

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error in the libvirt API, responsible for requesting information about network interfaces of a running QEMU domain. A local client connecting to the read-write socket with limited ACL permissions could use this flaw to crash the libvirt daemon, resulting in a denial of service, or potentially escalate their privileges on the system.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS

libvirt-bash-completion: before 6.2.0-8

libvirt-daemon-driver-secret: before 6.2.0-8

libvirt-libs: before 6.2.0-8

libvirt-admin: before 6.2.0-8

libvirt-wireshark: before 6.2.0-8

libvirt-daemon-driver-storage: before 6.2.0-8

libvirt-daemon-kvm: before 6.2.0-8

libvirt-daemon-config-network: before 6.2.0-8

libvirt-lock-sanlock: before 6.2.0-8

libvirt-client: before 6.2.0-8

libvirt-daemon-driver-nodedev: before 6.2.0-8

libvirt-daemon: before 6.2.0-8

libvirt-daemon-driver-storage-iscsi-direct: before 6.2.0-8

libvirt-daemon-driver-storage-gluster: before 6.2.0-8

libvirt-daemon-driver-interface: before 6.2.0-8

libvirt-daemon-driver-network: before 6.2.0-8

libvirt-daemon-qemu: before 6.2.0-8

libvirt-daemon-driver-storage-iscsi: before 6.2.0-8

libvirt-daemon-driver-qemu: before 6.2.0-8

libvirt-daemon-driver-storage-mpath: before 6.2.0-8

libvirt-daemon-driver-storage-disk: before 6.2.0-8

libvirt-devel: before 6.2.0-8

libvirt-docs: before 6.2.0-8

libvirt-daemon-driver-storage-logical: before 6.2.0-8

libvirt-nss: before 6.2.0-8

libvirt-daemon-driver-nwfilter: before 6.2.0-8

libvirt-debugsource: before 6.2.0-8

libvirt-daemon-driver-storage-core: before 6.2.0-8

libvirt-daemon-driver-storage-scsi: before 6.2.0-8

libvirt-daemon-config-nwfilter: before 6.2.0-8

libvirt-daemon-driver-storage-rbd: before 6.2.0-8

libvirt-debuginfo: before 6.2.0-8

libvirt: before 6.2.0-8

External links

http://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2020-1078

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. However, proof of concept for this vulnerability is available.