CVE-2021-3602

Name: CVE-2021-3602
Creator: NVD / NIST
Published: 2022-03-03T19:15:08.107+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.32%

Last modified Jun 17, 2026

CVE-2021-3602 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. An information disclosure flaw was found in Buildah, when building containers using chroot isolation. Running processes in container builds (e.g. EPSS estimates a 0.32% chance of exploitation in the next 30 days.

Description

An information disclosure flaw was found in Buildah, when building containers using chroot isolation. Running processes in container builds (e.g. Dockerfile RUN commands) can access environment variables from parent and grandparent processes. When run in a container in a CI/CD environment, environment variables may include sensitive information that was shared with the container in order to be used only by Buildah itself (e.g. container registry credentials).

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

0.32%

23.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Buildah Project	Buildah	< 1.16.8
Buildah Project	Buildah	>= 1.17.0, < 1.17.2
Buildah Project	Buildah	>= 1.19.0, < 1.19.9
Buildah Project	Buildah	>= 1.21.0, < 1.21.3
Redhat	Enterprise Linux	8.0
Redhat	Enterprise Linux For Ibm Z Systems	8.0
Redhat	Enterprise Linux For Power Little Endian	8.0

References

https://bugzilla.redhat.com/show_bug.cgi?id=1969264Issue Tracking, Patch, Third Party Advisory
https://github.com/containers/buildah/commit/a468ce0ffd347035d53ee0e26c205ef604097fb0Patch, Third Party Advisory
https://github.com/containers/buildah/security/advisories/GHSA-7638-r9r3-rmjjThird Party Advisory
https://ubuntu.com/security/CVE-2021-3602Patch, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1969264Issue Tracking, Patch, Third Party Advisory
https://github.com/containers/buildah/commit/a468ce0ffd347035d53ee0e26c205ef604097fb0Patch, Third Party Advisory
https://github.com/containers/buildah/security/advisories/GHSA-7638-r9r3-rmjjThird Party Advisory
https://ubuntu.com/security/CVE-2021-3602Patch, Third Party Advisory

Timeline

Published: Mar 3, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-3602?

How severe is CVE-2021-3602?

CVE-2021-3602 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.32% probability of exploitation in the next 30 days.

How do I fix CVE-2021-3602?

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-2021-3602?

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

Scan your code now

Source: NVD / NIST