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Fencer Intel
high 8.8

CVE-2018-6560 json

In dbus-proxy/flatpak-proxy.c in Flatpak before 0.8.9, and 0.9.x and 0.10.x before 0.10.3, crafted D-Bus messages to the host can be used t…

published 2018-02-02 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-18311

cvss
8.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 35%
public exploits
0
none known

Summary

In dbus-proxy/flatpak-proxy.c in Flatpak before 0.8.9, and 0.9.x and 0.10.x before 0.10.3, crafted D-Bus messages to the host can be used to break out of the sandbox, because whitespace handling in the proxy is not identical to whitespace handling in the daemon.

Patch / fix

  • flatpak flatpak 0.8.9, 0.10.3
  • flatpak Debian 14, Debian 13, Debian 12 0.10.3-1

debian advisories DEBIAN-CVE-2018-6560

  • flatpak RHEL 7 0.8.8-4.el7_5
  • flatpak-libs RHEL 7 0.8.8-4.el7_5
  • flatpak-builder RHEL 7 0.8.8-4.el7_5

red hat advisories RHSA-2018:2766

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-2018-6560 updated cvss 6.5

flatpak: sandbox escape in D-Bus filtering by a crafted authentication handshake

  • Red Hat Enterprise Linux Client (v. 7) flatpak 0.8.8-4.el7_5, flatpak-libs 0.8.8-4.el7_5 Red Hat Enterprise Linux Client Optional (v. 7) flatpak-builder 0.8.8-4.el7_5 Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) flatpak 0.8.8-4.el7_5, flatpak-libs 0.8.8-4.el7_5 Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) flatpak-builder 0.8.8-4.el7_5 Red Hat Enterprise Linux Server (v. 7) flatpak 0.8.8-4.el7_5, flatpak-libs 0.8.8-4.el7_5 Red Hat Enterprise Linux Server Optional (v. 7) flatpak-builder 0.8.8-4.el7_5
    +2 more products
    Red Hat Enterprise Linux Workstation (v. 7) flatpak 0.8.8-4.el7_5, flatpak-libs 0.8.8-4.el7_5 Red Hat Enterprise Linux Workstation Optional (v. 7) flatpak-builder 0.8.8-4.el7_5
    fixed: vendor fix RHSA-2018:2766
  • Red Hat Enterprise Linux 8 flatpak, flatpak-libs, flatpak-selinux, flatpak-session-helper
    not affected: vulnerable code not present

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

0.41% chance of exploitation in the next 30 days, higher than 35% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 8.8 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
NVD 2.0 4.6 AV:L/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness

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.