CVE-2018-20168 Denial of service in n/a

Medium 5.5 Published 17 Dec 2018 Updated 5 Aug 2024

Attackers can cause a denial of service in gVisor via a crafted application due to improper pagetable reuse, requiring an upgrade to fix.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2018-20168?

CVE-2018-20168 is a medium-severity denial of service vulnerability in n/a, published on 17 Dec 2018. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

Google gVisor before 2018-08-22 reuses a pagetable in a different level with the paging-structure cache intact, which allows attackers to cause a denial of service ("physical address not valid" panic) via a crafted application.

Weakness: CWE-20

Which versions are affected by CVE-2018-20168?

It affects 1 product.

Products include Google Gvisor.

How do I fix CVE-2018-20168?

No fix has been published for CVE-2018-20168 yet. Limit exposure of the affected software until one is available.

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-2018-20168 being exploited?

There is no known exploitation of CVE-2018-20168 in the wild and no public exploit code.

Sources

Also known as GHSA-7rr2-q546-7grq.