CVE-2016-6239 Denial of service in n/a
Attackers can cause a kernel panic and system crash in OpenBSD by exploiting the mmap extension with a large size value.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2016-6239?
CVE-2016-6239 is a medium-severity denial of service vulnerability in Openbsd Openbsd, published on 7 Mar 2017. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The mmap extension __MAP_NOFAULT in OpenBSD 5.8 and 5.9 allows attackers to cause a denial of service (kernel panic and crash) via a large size value.
Weakness: CWE-20
Which versions are affected by CVE-2016-6239?
It affects 1 product.
Products include Openbsd Openbsd.
How do I fix CVE-2016-6239?
No fix has been published for CVE-2016-6239 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-2016-6239 being exploited?
There is no known exploitation of CVE-2016-6239 in the wild and no public exploit code.
Other vulnerabilities in Openbsd Openbsd
Sources
Also known as GHSA-r5cc-h5wp-rfqg.