{
  "id": "openEuler-SA-2022-1788",
  "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2022-1788",
  "title": "An update for flatpak-builder is now available for openEuler-22.03-LTS",
  "severity": "Medium",
  "description": "Flatpak-builder is a tool for building flatpaks from sources.\r\n\r\nSecurity Fix(es):\r\n\r\nFlatpak is a Linux application sandboxing and distribution framework. A path traversal vulnerability affects versions of Flatpak prior to 1.12.3 and 1.10.6. flatpak-builder applies `finish-args` last in the build. At this point the build directory will have the full access that is specified in the manifest, so running `flatpak build` against it will gain those permissions. Normally this will not be done, so this is not problem. However, if `--mirror-screenshots-url` is specified, then flatpak-builder will launch `flatpak build --nofilesystem=host appstream-utils mirror-screenshots` after finalization, which can lead to issues even with the `--nofilesystem=host` protection. In normal use, the only issue is that these empty directories can be created wherever the user has write permissions. However, a malicious application could replace the `appstream-util` binary and potentially do something more hostile. This has been resolved in Flatpak 1.12.3 and 1.10.6 by changing the behaviour of `--nofilesystem=home` and `--nofilesystem=host`.(CVE-2022-21682)",
  "cves": [
    {
      "id": "CVE-2022-21682",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-21682",
      "severity": "Medium"
    }
  ]
}