CVE-2021-20182 Privilege escalation in openshift
Attackers with build container access can escalate privileges to cluster admin by exploiting raw device access in the chrooted environment.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-20182?
CVE-2021-20182 is a high-severity vulnerability in Redhat Openshift Container Platform, published on 23 Feb 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A privilege escalation flaw was found in openshift4/ose-docker-builder. The build container runs with high privileges using a chrooted environment instead of runc. If an attacker can gain access to this build container, they can potentially utilize the raw devices of the underlying node, such as the network and storage devices, to at least escalate their privileges to that of the cluster admin. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Weakness: CWE-552
Which versions are affected by CVE-2021-20182?
It affects 1 product.
Products include Redhat Openshift Container Platform.
How do I fix CVE-2021-20182?
No fix has been published for CVE-2021-20182 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-20182 being exploited?
There is no known exploitation of CVE-2021-20182 in the wild and no public exploit code.
Other vulnerabilities in Redhat Openshift Container Platform
- CVE-2020-27836 Missing authorization in cluster-ingress-operator
- CVE-2018-1085 Misconfiguration in openshift-ansible
- CVE-2026-54099 Privilege escalation in Red Hat OpenShift Container Platform 4
- CVE-2026-1784 Ose-cluster-ingress-operator: remote code execution through haproxy configuration injection
- CVE-2019-0542 xterm vulnerable to remote code execution