CVE-2021-3602 – github.com/containers/buildah

Package

Manager: go
Name: github.com/containers/buildah
Vulnerable Version: >=0 <1.16.8 || >=1.17.0 <1.17.2 || >=1.18.0 <1.19.9 || >=1.20.0 <1.21.3

Severity

Level: Medium

CVSS v3.1: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

EPSS: 0.0003 pctl0.06842

Details

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: * Open an issue in [buildah](https://github.com/containers/buildah/issues) * Email us at [the buildah general mailing list](mailto:buildah@lists.buildah.io), or [the podman security mailing list](mailto:security@lists.podman.io) if it's sensitive.

Metadata

Created: 2021-07-19T15:19:09Z
Modified: 2023-08-29T18:32:51Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/07/GHSA-7638-r9r3-rmjj/GHSA-7638-r9r3-rmjj.json
CWE IDs: ["CWE-200", "CWE-212"]
Alternative ID: GHSA-7638-r9r3-rmjj
Finding: F310
Auto approve: 1