Описание
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
- Email us at the buildah general mailing list, or the podman security mailing list if it's sensitive.
Ссылки
- https://github.com/containers/buildah/security/advisories/GHSA-7638-r9r3-rmjj
- https://nvd.nist.gov/vuln/detail/CVE-2021-3602
- https://github.com/containers/buildah/commit/a468ce0ffd347035d53ee0e26c205ef604097fb0
- https://bugzilla.redhat.com/show_bug.cgi?id=1969264
- https://pkg.go.dev/vuln/GO-2022-0345
- https://ubuntu.com/security/CVE-2021-3602
Пакеты
github.com/containers/buildah
<= 1.16.7
1.16.8
github.com/containers/buildah
>= 1.17.0, <= 1.17.1
1.17.2
github.com/containers/buildah
>= 1.18.0, <= 1.19.8
1.19.9
github.com/containers/buildah
>= 1.20.0, <= 1.21.2
1.21.3
Связанные уязвимости
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).
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).
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).
An information disclosure flaw was found in Buildah, when building con ...