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Fencer Intel
critical 9.0

CVE-2019-10063 json

Flatpak before 1.0.8, 1.1.x and 1.2.x before 1.2.4, and 1.3.x before 1.3.1 allows a sandbox bypass.

published 7y ago modified 4mo ago also EUVD-2019-2124

cvss
9.0
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.9%
EPSS 1.9% chance of exploitation in 30 days, percentile 79%
public exploits
0
none known

Summary

Flatpak before 1.0.8, 1.1.x and 1.2.x before 1.2.4, and 1.3.x before 1.3.1 allows a sandbox bypass. Flatpak versions since 0.8.1 address CVE-2017-5226 by using a seccomp filter to prevent sandboxed apps from using the TIOCSTI ioctl, which could otherwise be used to inject commands into the controlling terminal so that they would be executed outside the sandbox after the sandboxed app exits. This fix was incomplete: on 64-bit platforms, the seccomp filter could be bypassed by an ioctl request number that has TIOCSTI in its 32 least significant bits and an arbitrary nonzero value in its 32 most significant bits, which the Linux kernel would treat as equivalent to TIOCSTI.

Patch / fix

  • flatpak flatpak 1.0.8, 1.2.4
  • flatpak Debian 14, Debian 13, Debian 12 1.2.3-2

debian advisories DEBIAN-CVE-2019-10063

  • flatpak Ubuntu 18.04 LTS 1.0.8-0ubuntu0.18.04.1

ubuntu advisories UBUNTU-CVE-2019-10063

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • flatpak RHEL 8 1.0.6-3.el8_0
  • flatpak-libs RHEL 8 1.0.6-3.el8_0
  • flatpak RHEL 7 1.0.2-5.el7_6
  • flatpak-libs RHEL 7 1.0.2-5.el7_6
  • flatpak-builder RHEL 7 1.0.0-5.el7_6

red hat advisories RHSA-2019:1143RHSA-2019:1024

  • flatpak openSUSE Tumbleweed 1.11.3-1.2

opensuse advisories openSUSE-SU-2024:10762-1

  • flatpak Alpine 3.24, Alpine 3.23, Alpine 3.22 +12 more 1.2.4-r0
  • flatpak Alpine 3.9 1.0.8-r0

alpine advisories ALPINE-CVE-2019-10063

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • flatpak Arch Linux 1.3.1-1

arch linux advisories AVG-971

Is CVE-2019-10063 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2019-10063 updated cvss 8.8

flatpak: Sandbox bypass via IOCSTI (incomplete fix for CVE-2017-5226)

  • Red Hat Enterprise Linux AppStream (v. 8) flatpak 1.0.6-3.el8_0, flatpak-libs 1.0.6-3.el8_0
    fixed: vendor fix RHSA-2019:1143
  • Red Hat Enterprise Linux Client (v. 7) flatpak 1.0.2-5.el7_6, flatpak-libs 1.0.2-5.el7_6, flatpak-builder 1.0.0-5.el7_6 Red Hat Enterprise Linux Client Optional (v. 7) flatpak 1.0.2-5.el7_6, flatpak-libs 1.0.2-5.el7_6, flatpak-builder 1.0.0-5.el7_6 Red Hat Enterprise Linux ComputeNode Optional (v. 7) flatpak 1.0.2-5.el7_6, flatpak-libs 1.0.2-5.el7_6, flatpak-builder 1.0.0-5.el7_6 Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) flatpak 1.0.2-5.el7_6, flatpak-libs 1.0.2-5.el7_6, flatpak-builder 1.0.0-5.el7_6 Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) flatpak 1.0.2-5.el7_6, flatpak-libs 1.0.2-5.el7_6, flatpak-builder 1.0.0-5.el7_6 Red Hat Enterprise Linux Server (v. 7) flatpak 1.0.2-5.el7_6, flatpak-libs 1.0.2-5.el7_6, flatpak-builder 1.0.0-5.el7_6
    +3 more products
    Red Hat Enterprise Linux Server Optional (v. 7) flatpak 1.0.2-5.el7_6, flatpak-libs 1.0.2-5.el7_6, flatpak-builder 1.0.0-5.el7_6 Red Hat Enterprise Linux Workstation (v. 7) flatpak 1.0.2-5.el7_6, flatpak-libs 1.0.2-5.el7_6, flatpak-builder 1.0.0-5.el7_6 Red Hat Enterprise Linux Workstation Optional (v. 7) flatpak 1.0.2-5.el7_6, flatpak-libs 1.0.2-5.el7_6, flatpak-builder 1.0.0-5.el7_6
    fixed: vendor fix RHSA-2019:1024

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.91% chance of exploitation in the next 30 days, higher than 79% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 9.0 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.