gsd-2022-21682
Vulnerability from gsd
Modified
2023-12-13 01:19
Details
Flatpak 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`.
Aliases
Aliases
CVE-2022-21682


To clipboard 

{
  "GSD": {
    "alias": "CVE-2022-21682",
    "description": "Flatpak 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`.",
    "id": "GSD-2022-21682",
    "references": [
      "https://www.suse.com/security/cve/CVE-2022-21682.html",
      "https://www.debian.org/security/2022/dsa-5049",
      "https://advisories.mageia.org/CVE-2022-21682.html",
      "https://access.redhat.com/errata/RHSA-2022:7458"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2022-21682"
      ],
      "details": "Flatpak 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`.",
      "id": "GSD-2022-21682",
      "modified": "2023-12-13T01:19:14.694624Z",
      "schema_version": "1.4.0"
    }
  },
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                          "version_value": "\u003e= 1.11.0, \u003c 1.12.3"
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      "description": {
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            "value": "Flatpak 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`."
          }
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      },
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          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.7,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N",
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                "value": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)"
              }
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          {
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          {
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            "refsource": "FEDORA",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IXKBERLJRYV7KXKGXOLI6IOXVBQNN4DP/"
          },
          {
            "name": "GLSA-202312-12",
            "refsource": "GENTOO",
            "url": "https://security.gentoo.org/glsa/202312-12"
          }
        ]
      },
      "source": {
        "advisory": "GHSA-8ch7-5j3h-g4fx",
        "discovery": "UNKNOWN"
      }
    },
    "nvd.nist.gov": {
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        "descriptions": [
          {
            "lang": "en",
            "value": "Flatpak 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`."
          },
          {
            "lang": "es",
            "value": "Flatpak es un marco de distribuci\u00f3n y sandboxing de aplicaciones Linux. Una vulnerabilidad de salto de ruta afecta a las versiones de Flatpak anteriores a 1.12.3 y 1.10.6. flatpak-builder aplica \"finish-args\" en \u00faltimo lugar en la construcci\u00f3n. En este punto, el directorio de construcci\u00f3n tendr\u00e1 el acceso completo que es especificado en el manifiesto, por lo que la ejecuci\u00f3n de \"flatpak build\" contra \u00e9l ganar\u00e1 esos permisos. Normalmente esto no se realiza, por lo que no es un problema. Sin embargo, si se especifica \"--mirror-screenshots-url\", entonces flatpak-builder lanzar\u00e1 \"flatpak build --nofilesystem=host appstream-utils mirror-screenshots\" tras la finalizaci\u00f3n, lo que puede conllevar a problemas incluso con la protecci\u00f3n \"--nofilesystem=host\". En un uso normal, el \u00fanico problema es que estos directorios vac\u00edos pueden crearse en cualquier lugar donde el usuario tenga permisos de escritura. Sin embargo, una aplicaci\u00f3n maliciosa podr\u00eda reemplazar el binario \"appstream-util\" y potencialmente hacer algo m\u00e1s hostil. Esto ha sido resuelto en Flatpak versiones 1.12.3 y 1.10.6, al cambiar el comportamiento de \"--nofilesystem=home\" y \"--nofilesystem=host\""
          }
        ],
        "id": "CVE-2022-21682",
        "lastModified": "2023-12-23T10:15:09.173",
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              "baseSeverity": "MEDIUM",
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        "published": "2022-01-13T21:15:08.690",
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        "vulnStatus": "Modified",
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            "type": "Secondary"
          }
        ]
      }
    }
  }
}


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