Ecosyste.ms: Advisories

An open API service providing security vulnerability metadata for many open source software ecosystems.

Security Advisories: MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLTc2MzgtcjlyMy1ybWpq

Buildah processes using chroot isolation may leak environment values to intermediate processes

Impact

When running processes using "chroot" isolation, the process being run can examine the environment variables of its immediate parent and grandparent processes (CVE-2021-3602). This isolation type is often used when running buildah in unprivileged containers, and it is often used to do so in CI/CD environments. If sensitive information is exposed to the original buildah process through its environment, that information will unintentionally be shared with child processes which it starts as part of handling RUN instructions or during buildah run. The commands that buildah is instructed to run can read that information if they choose to.

Patches

Users should upgrade packages, or images which contain packages, to include version 1.21.3 or later.

Workarounds

As a workaround, invoking buildah in a container under env -i to have it started with a reinitialized environment should prevent the leakage.

For more information

If you have any questions or comments about this advisory:

Permalink: https://github.com/advisories/GHSA-7638-r9r3-rmjj
JSON: https://advisories.ecosyste.ms/api/v1/advisories/MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLTc2MzgtcjlyMy1ybWpq
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: over 3 years ago
Updated: over 1 year ago


CVSS Score: 5.5
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS Percentage: 0.00045
EPSS Percentile: 0.17541

Identifiers: GHSA-7638-r9r3-rmjj, CVE-2021-3602
References: Repository: https://github.com/containers/buildah
Blast Radius: 13.8

Affected Packages

go:github.com/containers/buildah
Dependent packages: 260
Dependent repositories: 321
Downloads:
Affected Version Ranges: >= 1.20.0, <= 1.21.2, >= 1.18.0, <= 1.19.8, >= 1.17.0, <= 1.17.1, <= 1.16.7
Fixed in: 1.21.3, 1.19.9, 1.17.2, 1.16.8
All affected versions: 0.16.0, 1.7.1, 1.7.2, 1.7.3, 1.8.0, 1.8.1, 1.8.2, 1.8.3, 1.8.4, 1.9.0, 1.9.1, 1.9.2, 1.10.0, 1.10.1, 1.11.0, 1.11.1, 1.11.2, 1.11.3, 1.11.4, 1.11.5, 1.11.6, 1.11.7, 1.12.0, 1.13.0, 1.13.1, 1.13.2, 1.14.0, 1.14.1, 1.14.2, 1.14.3, 1.14.4, 1.14.5, 1.14.6, 1.14.7, 1.14.8, 1.14.9, 1.14.10, 1.14.11, 1.15.0, 1.15.1, 1.15.2, 1.16.0, 1.16.1, 1.16.2, 1.16.3, 1.16.4, 1.16.5, 1.16.6, 1.16.7, 1.17.0, 1.17.1, 1.18.0, 1.19.0, 1.19.1, 1.19.2, 1.19.3, 1.19.4, 1.19.6, 1.19.7, 1.19.8, 1.20.0, 1.20.1, 1.20.2, 1.21.0, 1.21.1, 1.21.2
All unaffected versions: 1.16.8, 1.17.2, 1.19.9, 1.19.10, 1.19.11, 1.21.3, 1.21.4, 1.21.5, 1.22.0, 1.22.1, 1.22.2, 1.22.3, 1.22.4, 1.22.5, 1.23.0, 1.23.1, 1.23.2, 1.23.3, 1.23.4, 1.23.5, 1.24.0, 1.24.1, 1.24.2, 1.24.3, 1.24.4, 1.24.5, 1.24.6, 1.24.7, 1.25.0, 1.25.1, 1.26.0, 1.26.1, 1.26.2, 1.26.3, 1.26.4, 1.26.5, 1.26.6, 1.26.7, 1.27.0, 1.27.1, 1.27.2, 1.27.3, 1.27.4, 1.28.0, 1.28.1, 1.28.2, 1.29.0, 1.29.1, 1.29.2, 1.29.3, 1.29.4, 1.30.0, 1.31.0, 1.31.1, 1.31.2, 1.31.3, 1.31.4, 1.31.5, 1.32.0, 1.32.1, 1.32.2, 1.32.3, 1.33.0, 1.33.1, 1.33.2, 1.33.3, 1.33.4, 1.33.5, 1.33.6, 1.33.7, 1.33.8, 1.33.10, 1.34.0, 1.34.1, 1.34.2, 1.34.3, 1.35.0, 1.35.1, 1.35.2, 1.35.3, 1.35.4, 1.36.0, 1.37.0, 1.37.1, 1.37.2, 1.37.3, 1.37.4, 1.37.5