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CVE-2021-20182

HIGHCVSS 8.8/10EPSS 1.15%

Last modified

CVE-2021-20182 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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. EPSS estimates a 1.15% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
8.8/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
1.15%

62.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
RedhatOpenshift Container Platform>= 4.4, < 4.4.33
RedhatOpenshift Container Platform>= 4.5, < 4.5.30
RedhatOpenshift Container Platform>= 4.6, < 4.6.15

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-20182?
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.
How severe is CVE-2021-20182?
CVE-2021-20182 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 1.15% probability of exploitation in the next 30 days.
How do I fix CVE-2021-20182?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-20182?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST