CVE-2018-1062 Information disclosure in oVirt

Medium 5.3 Published 6 Mar 2018 Updated 17 Sep 2024

Privileged users of a new VM may access sensitive data from a previously deleted VM's disk due to incomplete zeroing when specific disk flags are enabled.

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-2018-1062?

CVE-2018-1062 is a medium-severity vulnerability in oVirt, published on 6 Mar 2018. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A vulnerability was discovered in oVirt 4.1.x before 4.1.9, where the combination of Enable Discard and Wipe After Delete flags for VM disks managed by oVirt, could cause a disk to be incompletely zeroed when removed from a VM. If the same storage blocks happen to be later allocated to a new disk attached to another VM, potentially sensitive data could be revealed to privileged users of that VM.

Weakness: CWE-212

Which versions are affected by CVE-2018-1062?

It affects 1 product.

Linux distribution packages (20)

`ovirt-engine` Red Hat:rhev_manager:4	All versions	`0:4.1.9.1-0.1.el7`
`ovirt-engine-backend` Red Hat:rhev_manager:4	All versions	`0:4.1.9.1-0.1.el7`
`ovirt-engine-dbscripts` Red Hat:rhev_manager:4	All versions	`0:4.1.9.1-0.1.el7`
`ovirt-engine-extensions-api-impl` Red Hat:rhev_manager:4	All versions	`0:4.1.9.1-0.1.el7`
`ovirt-engine-extensions-api-impl-javadoc` Red Hat:rhev_manager:4	All versions	`0:4.1.9.1-0.1.el7`
`ovirt-engine-lib` Red Hat:rhev_manager:4	All versions	`0:4.1.9.1-0.1.el7`
`ovirt-engine-restapi` Red Hat:rhev_manager:4	All versions	`0:4.1.9.1-0.1.el7`
`ovirt-engine-setup` Red Hat:rhev_manager:4	All versions	`0:4.1.9.1-0.1.el7`
`ovirt-engine-setup-base` Red Hat:rhev_manager:4	All versions	`0:4.1.9.1-0.1.el7`
`ovirt-engine-setup-plugin-ovirt-engine` Red Hat:rhev_manager:4	All versions	`0:4.1.9.1-0.1.el7`
`ovirt-engine-setup-plugin-ovirt-engine-common` Red Hat:rhev_manager:4	All versions	`0:4.1.9.1-0.1.el7`
`ovirt-engine-setup-plugin-vmconsole-proxy-helper` Red Hat:rhev_manager:4	All versions	`0:4.1.9.1-0.1.el7`
`ovirt-engine-setup-plugin-websocket-proxy` Red Hat:rhev_manager:4	All versions	`0:4.1.9.1-0.1.el7`
`ovirt-engine-tools` Red Hat:rhev_manager:4	All versions	`0:4.1.9.1-0.1.el7`
`ovirt-engine-tools-backup` Red Hat:rhev_manager:4	All versions	`0:4.1.9.1-0.1.el7`
`ovirt-engine-userportal` Red Hat:rhev_manager:4	All versions	`0:4.1.9.1-0.1.el7`
`ovirt-engine-vmconsole-proxy-helper` Red Hat:rhev_manager:4	All versions	`0:4.1.9.1-0.1.el7`
`ovirt-engine-webadmin-portal` Red Hat:rhev_manager:4	All versions	`0:4.1.9.1-0.1.el7`
`ovirt-engine-websocket-proxy` Red Hat:rhev_manager:4	All versions	`0:4.1.9.1-0.1.el7`
`rhevm` Red Hat:rhev_manager:4	All versions	`0:4.1.9.1-0.1.el7`

Products include Redhat Ovirt-Engine.

How do I fix CVE-2018-1062?

Upgrade to a fixed version.

Is CVE-2018-1062 being exploited?

There is no known exploitation of CVE-2018-1062 in the wild and no public exploit code.

Sources

Also known as GHSA-j45v-g64g-45w2, RHBA-2018:0135.