What’s Vulnerable › Vulnerabilities

CVE-2018-6560

• Severity: high (CVSS 8.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-02-02 · updated 2026-06-17
• Weakness: CWE-436

Description

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.

Affected products

• flatpak: before 0.8.9; from 0.9.1 through 0.9.99; from 0.10.0 before 0.10.3 — fixed in 0.10.3, 0.8.9
• RedHat Enterprise Linux Desktop: 7.0
• RedHat Enterprise Linux Server: 7.0
• RedHat Enterprise Linux Server Aus: 7.6
• RedHat Enterprise Linux Server Eus: 7.5, 7.6
• RedHat Enterprise Linux Server Tus: 7.6
• RedHat Enterprise Linux Workstation: 7.0

How to fix

Upgrade to a fixed version: flatpak 0.10.3, 0.8.9. Check the vendor advisory for mitigations.

References

• https://access.redhat.com/errata/RHSA-2018:2766
• https://github.com/flatpak/flatpak/commit/52346bf187b5a7f1c0fe9075b328b7ad6abe78f6
• https://github.com/flatpak/flatpak/releases/tag/0.10.3
• https://github.com/flatpak/flatpak/releases/tag/0.8.9
• https://access.redhat.com/errata/RHSA-2018:2766
• https://github.com/flatpak/flatpak/commit/52346bf187b5a7f1c0fe9075b328b7ad6abe78f6
• https://github.com/flatpak/flatpak/releases/tag/0.10.3
• https://github.com/flatpak/flatpak/releases/tag/0.8.9

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