CVE-2018-5748

qemu/qemu_monitor.c in libvirt allows attackers to cause a denial of service (memory consumption) via a large QEMU reply.

The product does not properly control the allocation and maintenance of a limited resource.

Name	Vendor	Start Version	End Version
Libvirt	Redhat	- (including)	- (including)
Red Hat Enterprise Linux 6	RedHat	libvirt-0:0.10.2-64.el6	*
Red Hat Enterprise Linux 7	RedHat	libvirt-0:3.9.0-14.el7_5.4	*
Red Hat Storage 3 for RHEL 6	RedHat	libvirt-0:0.10.2-64.el6	*
Libvirt	Ubuntu	artful	*
Libvirt	Ubuntu	esm-infra-legacy/trusty	*
Libvirt	Ubuntu	esm-infra/xenial	*
Libvirt	Ubuntu	precise/esm	*
Libvirt	Ubuntu	trusty	*
Libvirt	Ubuntu	trusty/esm	*
Libvirt	Ubuntu	xenial	*

Mitigation of resource exhaustion attacks requires that the target system either:
The first of these solutions is an issue in itself though, since it may allow attackers to prevent the use of the system by a particular valid user. If the attacker impersonates the valid user, they may be able to prevent the user from accessing the server in question.
The second solution is simply difficult to effectively institute – and even when properly done, it does not provide a full solution. It simply makes the attack require more resources on the part of the attacker.

NVD	https://nvd.nist.gov/vuln/detail/CVE-2018-5748
CWE	https://cwe.mitre.org/data/definitions/400.html

Uncontrolled Resource Consumption