CVE-2019-3879 Missing authorization in ovirt-engine

Medium 6.5 Published 25 Mar 2019 Updated 4 Aug 2024

Low-privilege users can delete virtual machine disks due to skipped permission checks in the oVirt REST API.

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

What is CVE-2019-3879?

CVE-2019-3879 is a medium-severity missing authorization vulnerability in Redhat Virtualization, published on 25 Mar 2019. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

It was discovered that in the ovirt's REST API before version 4.3.2.1, RemoveDiskCommand is triggered as an internal command, meaning the permission validation that should be performed against the calling user is skipped. A user with low privileges (eg Basic Operations) could exploit this flaw to delete disks attached to guests.

Weakness: CWE-862

Which versions are affected by CVE-2019-3879?

It affects 2 products.

Linux distribution packages (20)

`ovirt-engine` Red Hat:rhev_manager:4.2	All versions	`0:4.2.8.7-0.1.el7ev`
`ovirt-engine-backend` Red Hat:rhev_manager:4.2	All versions	`0:4.2.8.7-0.1.el7ev`
`ovirt-engine-dbscripts` Red Hat:rhev_manager:4.2	All versions	`0:4.2.8.7-0.1.el7ev`
`ovirt-engine-extensions-api-impl` Red Hat:rhev_manager:4.2	All versions	`0:4.2.8.7-0.1.el7ev`
`ovirt-engine-extensions-api-impl-javadoc` Red Hat:rhev_manager:4.2	All versions	`0:4.2.8.7-0.1.el7ev`
`ovirt-engine-health-check-bundler` Red Hat:rhev_manager:4.2	All versions	`0:4.2.8.7-0.1.el7ev`
`ovirt-engine-lib` Red Hat:rhev_manager:4.2	All versions	`0:4.2.8.7-0.1.el7ev`
`ovirt-engine-restapi` Red Hat:rhev_manager:4.2	All versions	`0:4.2.8.7-0.1.el7ev`
`ovirt-engine-setup` Red Hat:rhev_manager:4.2	All versions	`0:4.2.8.7-0.1.el7ev`
`ovirt-engine-setup-base` Red Hat:rhev_manager:4.2	All versions	`0:4.2.8.7-0.1.el7ev`
`ovirt-engine-setup-plugin-ovirt-engine` Red Hat:rhev_manager:4.2	All versions	`0:4.2.8.7-0.1.el7ev`
`ovirt-engine-setup-plugin-ovirt-engine-common` Red Hat:rhev_manager:4.2	All versions	`0:4.2.8.7-0.1.el7ev`
`ovirt-engine-setup-plugin-vmconsole-proxy-helper` Red Hat:rhev_manager:4.2	All versions	`0:4.2.8.7-0.1.el7ev`
`ovirt-engine-setup-plugin-websocket-proxy` Red Hat:rhev_manager:4.2	All versions	`0:4.2.8.7-0.1.el7ev`
`ovirt-engine-tools` Red Hat:rhev_manager:4.2	All versions	`0:4.2.8.7-0.1.el7ev`
`ovirt-engine-tools-backup` Red Hat:rhev_manager:4.2	All versions	`0:4.2.8.7-0.1.el7ev`
`ovirt-engine-vmconsole-proxy-helper` Red Hat:rhev_manager:4.2	All versions	`0:4.2.8.7-0.1.el7ev`
`ovirt-engine-webadmin-portal` Red Hat:rhev_manager:4.2	All versions	`0:4.2.8.7-0.1.el7ev`
`ovirt-engine-websocket-proxy` Red Hat:rhev_manager:4.2	All versions	`0:4.2.8.7-0.1.el7ev`
`rhvm` Red Hat:rhev_manager:4.2	All versions	`0:4.2.8.7-0.1.el7ev`

Products include Ovirt Ovirt, Redhat Virtualization.

How do I fix CVE-2019-3879?

Apply the vendor's patch.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2019-3879 being exploited?

There is no known exploitation of CVE-2019-3879 in the wild and no public exploit code.

All Redhat Virtualization vulnerabilities

Sources

Also known as GHSA-9fjf-3vjh-p57c, RHBA-2019:0802.