GHSA-7638-R9R3-RMJJ
Vulnerability from github – Published: 2021-07-19 15:19 – Updated: 2023-08-29 18:32
VLAI?
Summary
Buildah processes using chroot isolation may leak environment values to intermediate processes
Details
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.
Severity ?
5.5 (Medium)
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 1.16.7"
},
"package": {
"ecosystem": "Go",
"name": "github.com/containers/buildah"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.16.8"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 1.17.1"
},
"package": {
"ecosystem": "Go",
"name": "github.com/containers/buildah"
},
"ranges": [
{
"events": [
{
"introduced": "1.17.0"
},
{
"fixed": "1.17.2"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 1.19.8"
},
"package": {
"ecosystem": "Go",
"name": "github.com/containers/buildah"
},
"ranges": [
{
"events": [
{
"introduced": "1.18.0"
},
{
"fixed": "1.19.9"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 1.21.2"
},
"package": {
"ecosystem": "Go",
"name": "github.com/containers/buildah"
},
"ranges": [
{
"events": [
{
"introduced": "1.20.0"
},
{
"fixed": "1.21.3"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2021-3602"
],
"database_specific": {
"cwe_ids": [
"CWE-200",
"CWE-212"
],
"github_reviewed": true,
"github_reviewed_at": "2021-07-15T20:26:57Z",
"nvd_published_at": "2022-03-03T19:15:00Z",
"severity": "MODERATE"
},
"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\u0027s sensitive.",
"id": "GHSA-7638-r9r3-rmjj",
"modified": "2023-08-29T18:32:51Z",
"published": "2021-07-19T15:19:09Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/containers/buildah/security/advisories/GHSA-7638-r9r3-rmjj"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-3602"
},
{
"type": "WEB",
"url": "https://github.com/containers/buildah/commit/a468ce0ffd347035d53ee0e26c205ef604097fb0"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1969264"
},
{
"type": "PACKAGE",
"url": "https://github.com/containers/buildah"
},
{
"type": "WEB",
"url": "https://pkg.go.dev/vuln/GO-2022-0345"
},
{
"type": "WEB",
"url": "https://ubuntu.com/security/CVE-2021-3602"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
],
"summary": "Buildah processes using chroot isolation may leak environment values to intermediate processes"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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