CVE-2016-4037 Denial of service in n/a

Medium 6.0 Published Updated

Local guest OS administrators can cause a denial of service in QEMU via a circular split isochronous transfer descriptor list, leading to infinite loops and CPU consumption.

Exploited in the wild
Not known
Login needed
An administrator
Attackable
Local or same network only
Victim action needed
Not needed
Fix
Available

What is CVE-2016-4037?

CVE-2016-4037 is a medium-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 23 May 2016. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

The ehci_advance_state function in hw/usb/hcd-ehci.c in QEMU allows local guest OS administrators to cause a denial of service (infinite loop and CPU consumption) via a circular split isochronous transfer descriptor (siTD) list, a related issue to CVE-2015-8558.

Weakness: CWE-400

Which versions are affected by CVE-2016-4037?

It affects 4 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Fedoraproject Fedora, Qemu Qemu.

How do I fix CVE-2016-4037?

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-2016-4037 being exploited?

There is no known exploitation of CVE-2016-4037 in the wild and no public exploit code.

All Canonical Ubuntu Linux vulnerabilities

Sources

Also known as DEBIAN-CVE-2016-4037, GHSA-3cv8-m6fw-pjg4, UBUNTU-CVE-2016-4037.

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