CVE-2021-3602: Infoleak
First published: Tue Jun 08 2021(Updated: )
### 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.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| go/github.com/containers/buildah | >=1.20.0<=1.21.2 | 1.21.3 |
| go/github.com/containers/buildah | >=1.18.0<=1.19.8 | 1.19.9 |
| go/github.com/containers/buildah | >=1.17.0<=1.17.1 | 1.17.2 |
| go/github.com/containers/buildah | <=1.16.7 | 1.16.8 |
| 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 | |
| redhat/buildah | <1.21.3 | 1.21.3 |
| redhat/buildah | <1.19.9 | 1.19.9 |
| redhat/buildah | <1.17.2 | 1.17.2 |
| redhat/buildah | <1.16.8 | 1.16.8 |
| debian/golang-github-containers-buildah | <=1.19.6+dfsg1-1 | 1.28.2+ds1-3 1.37.3+ds1-3 |
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Reference Links
- 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://ubuntu.com/security/CVE-2021-3602
- https://pkg.go.dev/vuln/GO-2022-0345
- https://github.com/advisories/GHSA-7638-r9r3-rmjj (Advisory)
- https://launchpad.net/bugs/cve/CVE-2021-3602
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1982880
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1982881
- https://github.com/containers/buildah/commit/23c478b815fb93c094070baa336bcb6a27c01683
- https://github.com/containers/buildah/commit/6e88db198c43bd5c44c2589aa381f57534cef3d7
- https://github.com/containers/buildah/commit/f4f2a7fc78fa4f12e2f6e6c4ab450aae0d182f3e
- https://github.com/containers/buildah/commit/b8a1bcb8b648220b49daa45c9410dec58dc6ed7a
- https://github.com/containers/buildah/commit/41d24dedddec67090bb5069f7d8b4c311b91f3d4
- https://github.com/containers/buildah/commit/8271e54634a48ccee06768f37702fd4a3daacb3d
- https://access.redhat.com/errata/RHSA-2021:4154
- https://access.redhat.com/errata/RHSA-2021:4221
- https://access.redhat.com/errata/RHSA-2021:4222
- https://security-tracker.debian.org/tracker/CVE-2021-3602
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3602
Frequently Asked Questions
What is the vulnerability ID for this Buildah flaw?
The vulnerability ID for this Buildah flaw is CVE-2021-3602.
What is the impact of the vulnerability?
The impact of the vulnerability is an information disclosure.
How does the vulnerability in Buildah occur?
The vulnerability in Buildah occurs when running processes using "chroot" isolation.
What is the severity of CVE-2021-3602?
The severity of CVE-2021-3602 is medium.
Which version of Buildah is affected by this vulnerability?
The versions affected by this vulnerability are 1.21.3, 1.19.9, 1.17.2, and 1.16.8.
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