CVE-2018-16848 OpenStack Mistral DoS
Attackers can cause denial of service in OpenStack Mistral by submitting crafted YAML workflow definitions with nested anchors.
- 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-2018-16848?
CVE-2018-16848 is a medium-severity denial of service vulnerability in openstack-mistral, published on 15 Jun 2020. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A Denial of Service (DoS) condition is possible in OpenStack Mistral in versions up to and including 7.0.3. Submitting a specially crafted workflow definition YAML file containing nested anchors can lead to resource exhaustion culminating in a denial of service.
Weakness: CWE-400
Which versions are affected by CVE-2018-16848?
3 open source packages ship an affected version, including mistral. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
mistral PyPI | All versions | 10.0.0 |
mistral PyPI | All versions | 10.0.0 |
mistral PyPI | All versions | 7.0.4 |
Products include Redhat Openstack-Mistral.
How do I fix CVE-2018-16848?
Upgrade mistral to a fixed version for your release line: 10.0.0 or 7.0.4.
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-2018-16848 being exploited?
There is no known exploitation of CVE-2018-16848 in the wild and no public exploit code.
Other vulnerabilities in openstack-mistral
Sources
Also known as DEBIAN-CVE-2018-16848, GHSA-443j-6p7g-6v4w, PYSEC-2020-240, UBUNTU-CVE-2018-16848.