CVE-2021-3602: Github.com/containers/buildah Buildah Processes Using Chroot Isolation Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-7638-r9r3-rmjj",
  "modified" : "2023-08-29T18:32:51Z",
  "published" : "2021-07-19T15:19:09Z",
  "aliases" : [ "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.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/containers/buildah"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.16.8"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 1.16.7"
    }
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/containers/buildah"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.17.0"
      }, {
        "fixed" : "1.17.2"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 1.17.1"
    }
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/containers/buildah"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.18.0"
      }, {
        "fixed" : "1.19.9"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 1.19.8"
    }
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/containers/buildah"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.20.0"
      }, {
        "fixed" : "1.21.3"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 1.21.2"
    }
  } ],
  "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"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-200", "CWE-212" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-07-15T20:26:57Z",
    "nvd_published_at" : "2022-03-03T19:15:00Z"
  }
}