CVE-2018-5748 Denial of service in n/a

High 7.5 Published 25 Jan 2018 Updated 5 Aug 2024

Attackers can cause a denial of service via memory consumption by sending large QEMU replies to libvirt.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2018-5748?

CVE-2018-5748 is a high-severity denial of service vulnerability in Debian Debian Linux, published on 25 Jan 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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

Weakness: CWE-400

Which versions are affected by CVE-2018-5748?

It affects 8 products.

Linux distribution packages (10)

`libvirt` SUSE:Linux Enterprise Desktop 12 SP2	All versions	`2.0.0-27.29.1`
`libvirt` SUSE:Linux Enterprise Desktop 12 SP3	All versions	`3.3.0-5.13.1`
`libvirt` SUSE:Linux Enterprise Server 12 SP2	All versions	`2.0.0-27.29.1`
`libvirt` SUSE:Linux Enterprise Server 12 SP3	All versions	`3.3.0-5.13.1`
`libvirt` SUSE:Linux Enterprise Server for Raspberry Pi 12 SP2	All versions	`2.0.0-27.29.1`
`libvirt` SUSE:Linux Enterprise Server for SAP Applications 12 SP2	All versions	`2.0.0-27.29.1`
`libvirt` SUSE:Linux Enterprise Server for SAP Applications 12 SP3	All versions	`3.3.0-5.13.1`
`libvirt` SUSE:Linux Enterprise Software Development Kit 12 SP2	All versions	`2.0.0-27.29.1`
`libvirt` SUSE:Linux Enterprise Software Development Kit 12 SP3	All versions	`3.3.0-5.13.1`
`libvirt` SUSE:Linux Enterprise Workstation Extension 12 SP2	All versions	`2.0.0-27.29.1`

Products include Debian Debian Linux, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server, Redhat Enterprise Linux Server Aus, Redhat Enterprise Linux Server Eus, Redhat Enterprise Linux Server Tus and 2 more.

How do I fix CVE-2018-5748?

Apply the vendor's patch.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2018-5748 being exploited?

There is no known exploitation of CVE-2018-5748 in the wild and no public exploit code.

All Debian Debian Linux vulnerabilities

Sources

Also known as DEBIAN-CVE-2018-5748, GHSA-vgrm-6fx3-7frj, SUSE-SU-2018:0279-1, SUSE-SU-2018:0385-1, UBUNTU-CVE-2018-5748.