OESA-2021-1404 (CVE-2021-41133)

Vulnerability from osv_openeuler – Published: 2021-10-30 11:04 – Updated: 2026-08-06 11:04 – Source website
VLAI
Summary
flatpak security update
Details

flatpak is a system for building, distributing and running sandboxed desktop applications on Linux.

Security Fix(es):

In versions prior to 1.10.4 and 1.12.0, Flatpak apps with direct access to AF_UNIX sockets such as those used by Wayland, Pipewire or pipewire-pulse can trick portals and other host-OS services into treating the Flatpak app as though it was an ordinary, non-sandboxed host-OS process. They can do this by manipulating the VFS using recent mount-related syscalls that are not blocked by Flatpak's denylist seccomp filter, in order to substitute a crafted /.flatpak-info or make that file disappear entirely. Flatpak apps that act as clients for AF_UNIX sockets such as those used by Wayland, Pipewire or pipewire-pulse can escalate the privileges that the corresponding services will believe the Flatpak app has. Note that protocols that operate entirely over the D-Bus session bus (user bus), system bus or accessibility bus are not affected by this. This is due to the use of a proxy process xdg-dbus-proxy, whose VFS cannot be manipulated by the Flatpak app, when interacting with these buses. Patches exist for versions 1.10.4 and 1.12.0, and as of time of publication, a patch for version 1.8.2 is being planned. There are no workarounds aside from upgrading to a patched version.(CVE-2021-41133)

Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "flatpak-debuginfo-1.0.3-7.oe1.aarch64.rpm",
          "flatpak-1.0.3-7.oe1.aarch64.rpm",
          "flatpak-devel-1.0.3-7.oe1.aarch64.rpm",
          "flatpak-debugsource-1.0.3-7.oe1.aarch64.rpm"
        ],
        "noarch": [
          "flatpak-help-1.0.3-7.oe1.noarch.rpm"
        ],
        "src": [
          "flatpak-1.0.3-7.oe1.src.rpm"
        ],
        "x86_64": [
          "flatpak-devel-1.0.3-7.oe1.x86_64.rpm",
          "flatpak-1.0.3-7.oe1.x86_64.rpm",
          "flatpak-debugsource-1.0.3-7.oe1.x86_64.rpm",
          "flatpak-debuginfo-1.0.3-7.oe1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP1",
        "name": "flatpak",
        "purl": "pkg:rpm/openEuler/flatpak\u0026distro=openEuler-20.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.0.3-7.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "flatpak-debuginfo-1.0.3-7.oe1.aarch64.rpm",
          "flatpak-1.0.3-7.oe1.aarch64.rpm",
          "flatpak-devel-1.0.3-7.oe1.aarch64.rpm",
          "flatpak-debugsource-1.0.3-7.oe1.aarch64.rpm"
        ],
        "noarch": [
          "flatpak-help-1.0.3-7.oe1.noarch.rpm"
        ],
        "src": [
          "flatpak-1.0.3-7.oe1.src.rpm"
        ],
        "x86_64": [
          "flatpak-devel-1.0.3-7.oe1.x86_64.rpm",
          "flatpak-1.0.3-7.oe1.x86_64.rpm",
          "flatpak-debugsource-1.0.3-7.oe1.x86_64.rpm",
          "flatpak-debuginfo-1.0.3-7.oe1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP2",
        "name": "flatpak",
        "purl": "pkg:rpm/openEuler/flatpak\u0026distro=openEuler-20.03-LTS-SP2"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.0.3-7.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "High"
  },
  "details": "flatpak is a system for building, distributing and running sandboxed desktop applications on Linux.\r\n\r\nSecurity Fix(es):\r\n\r\nIn versions prior to 1.10.4 and 1.12.0, Flatpak apps with direct access to AF_UNIX sockets such as those used by Wayland, Pipewire or pipewire-pulse can trick portals and other host-OS services into treating the Flatpak app as though it was an ordinary, non-sandboxed host-OS process. They can do this by manipulating the VFS using recent mount-related syscalls that are not blocked by Flatpak\u0026apos;s denylist seccomp filter, in order to substitute a crafted `/.flatpak-info` or make that file disappear entirely. Flatpak apps that act as clients for AF_UNIX sockets such as those used by Wayland, Pipewire or pipewire-pulse can escalate the privileges that the corresponding services will believe the Flatpak app has. Note that protocols that operate entirely over the D-Bus session bus (user bus), system bus or accessibility bus are not affected by this. This is due to the use of a proxy process `xdg-dbus-proxy`, whose VFS cannot be manipulated by the Flatpak app, when interacting with these buses. Patches exist for versions 1.10.4 and 1.12.0, and as of time of publication, a patch for version 1.8.2 is being planned. There are no workarounds aside from upgrading to a patched version.(CVE-2021-41133)",
  "id": "OESA-2021-1404",
  "modified": "2026-08-06T11:04:40Z",
  "published": "2021-10-30T11:04:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2021-1404"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-41133"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "flatpak security update",
  "upstream": [
    "CVE-2021-41133"
  ]
}



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