CVE-2019-14891 Denial of service in cri-o
An attacker can trigger an OOM condition to kill container management processes, potentially gaining host network access on cri-o hosts.
- 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-2019-14891?
CVE-2019-14891 is a medium-severity denial of service vulnerability in Fedoraproject Fedora, published on 25 Nov 2019. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A flaw was found in cri-o, as a result of all pod-related processes being placed in the same memory cgroup. This can result in container management (conmon) processes being killed if a workload process triggers an out-of-memory (OOM) condition for the cgroup. An attacker could abuse this flaw to get host network access on an cri-o host.
Which versions are affected by CVE-2019-14891?
It affects 3 products.
Linux distribution packages (5)
cri-o Red Hat:openshift:4.2::el7 | All versions | 0:1.14.12-24.dev.rhaos4.2.gita17905f.el7 |
cri-o-debuginfo Red Hat:openshift:4.2::el7 | All versions | 0:1.14.12-24.dev.rhaos4.2.gita17905f.el7 |
cri-o Red Hat:openshift:4.2::el8 | All versions | 0:1.14.12-15.dev.rhaos4.2.gita17905f.el8 |
cri-o-debuginfo Red Hat:openshift:4.2::el8 | All versions | 0:1.14.12-15.dev.rhaos4.2.gita17905f.el8 |
cri-o-debugsource Red Hat:openshift:4.2::el8 | All versions | 0:1.14.12-15.dev.rhaos4.2.gita17905f.el8 |
Products include Fedoraproject Fedora, Kubernetes Cri-O, Redhat Openshift Container Platform.
How do I fix CVE-2019-14891?
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-2019-14891 being exploited?
There is no known exploitation of CVE-2019-14891 in the wild and no public exploit code.
Other vulnerabilities in Fedoraproject Fedora
Sources
Also known as GHSA-7hwv-gxwq-2g5p, RHSA-2020:2776.