{"id":"CVE-2021-3602","aliases":["GHSA-7638-r9r3-rmjj","GO-2022-0345"],"url":"https://o3.security/vulnerability/CVE-2021-3602","summary":"Buildah processes using chroot isolation may leak environment values to intermediate processes","details":"### Impact\nWhen 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.\n\n### Patches\nUsers should upgrade packages, or images which contain packages, to include version 1.21.3 or later.\n\n### Workarounds\nAs a workaround, invoking `buildah` in a container under `env -i` to have it started with a reinitialized environment should prevent the leakage.\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in [buildah](https://github.com/containers/buildah/issues)\n* 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.","published":"2022-03-03T19:15:08.107Z","modified":"2026-10-20T10:54:46.917867762Z","cvss":{"score":5.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"},"epss":{"score":0.00327,"percentile":0.25841,"asOf":"2026-09-17"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/containers/buildah","fixedVersion":"1.16.8"},{"ecosystem":"Go","name":"github.com/containers/buildah","fixedVersion":"1.17.2"},{"ecosystem":"Go","name":"github.com/containers/buildah","fixedVersion":"1.19.9"},{"ecosystem":"Go","name":"github.com/containers/buildah","fixedVersion":"1.21.3"}],"fix":{"url":"https://github.com/containers/buildah/commit/a468ce0ffd347035d53ee0e26c205ef604097fb0","label":"containers/buildah@a468ce0"},"references":[{"type":"ADVISORY","url":"https://github.com/containers/buildah/security/advisories/GHSA-7638-r9r3-rmjj"},{"type":"FIX","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1969264"},{"type":"FIX","url":"https://github.com/containers/buildah/commit/a468ce0ffd347035d53ee0e26c205ef604097fb0"},{"type":"FIX","url":"https://ubuntu.com/security/CVE-2021-3602"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-3602"},{"type":"PACKAGE","url":"https://github.com/containers/buildah"},{"type":"WEB","url":"https://pkg.go.dev/vuln/GO-2022-0345"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-20T10:54:46.917867762Z"}}