CVE-2021-41133
See a problem?- Source
- https://nvd.nist.gov/vuln/detail/CVE-2021-41133
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-41133.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-41133
- Aliases
-
- CVE-2021-42762
- GHSA-67h7-w3jq-vh4q
- Related
- Published
- 2021-10-08T14:15:08Z
- Modified
- 2024-09-18T03:27:03.424333Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
Flatpak is a system for building, distributing, and running sandboxed desktop applications on Linux. In versions prior to 1.10.4 and 1.12.0, Flatpak apps with direct access to AFUNIX 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-infoor make that file disappear entirely. Flatpak apps that act as clients for AFUNIX 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 processxdg-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. - References
-
- https://github.com/flatpak/flatpak/security/advisories/GHSA-67h7-w3jq-vh4q
- https://security.gentoo.org/glsa/202312-12
- https://www.debian.org/security/2021/dsa-4984
- http://www.openwall.com/lists/oss-security/2021/10/26/9
- https://github.com/flatpak/flatpak/commit/1330662f33a55e88bfe18e76de28b7922d91a999
- https://github.com/flatpak/flatpak/commit/26b12484eb8a6219b9e7aa287b298a894b2f34ca
- https://github.com/flatpak/flatpak/commit/462fca2c666e0cd2b60d6d2593a7216a83047aaf
- https://github.com/flatpak/flatpak/commit/4c34815784e9ffda5733225c7d95824f96375e36
- https://github.com/flatpak/flatpak/commit/89ae9fe74c6d445bb1b3a40e568d77cf5de47e48
- https://github.com/flatpak/flatpak/commit/9766ee05b1425db397d2cf23afd24c7f6146a69f
- https://github.com/flatpak/flatpak/commit/a10f52a7565c549612c92b8e736a6698a53db330
- https://github.com/flatpak/flatpak/commit/e26ac7586c392b5eb35ff4609fe232c52523b2cf
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R5656ONDP2MGKIJMKEC7N2NXCV27WGTC/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T5DKCYRC6MFSTFCUP4DELCOUUP3SFEFX/
- https://security-tracker.debian.org/tracker/CVE-2021-41133
Affected packages
Debian:11 / flatpak
Package
- Name
- flatpak
- Purl
- pkg:deb/debian/flatpak?arch=source
Debian:12 / flatpak
Package
- Name
- flatpak
- Purl
- pkg:deb/debian/flatpak?arch=source
Debian:13 / flatpak
Package
- Name
- flatpak
- Purl
- pkg:deb/debian/flatpak?arch=source
Git / github.com/flatpak/flatpak
Affected ranges
- Type
- GIT
- Repo
- https://github.com/flatpak/flatpak
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixedFixedFixedFixedFixedFixedFixedFixed