CVE-2019-10063: Input Validation
First published: Tue Mar 26 2019(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/flatpak | <1.3.2 | 1.3.2 |
| Flatpak Flatpak | <1.0.8 | |
| Flatpak Flatpak | >=1.1.0<=1.1.3 | |
| Flatpak Flatpak | >=1.2.0<1.2.4 | |
| Flatpak Flatpak | =1.3.0 |
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Reference Links
- https://access.redhat.com/errata/RHSA-2019:1024
- https://access.redhat.com/errata/RHSA-2019:1143
- https://github.com/flatpak/flatpak/issues/2782
- https://access.redhat.com/security/cve/CVE-2017-5226
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1695974
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-5226
- https://github.com/flatpak/flatpak/commit/902fb713990a8f968ea4350c7c2a27ff46f1a6c4
- https://github.com/flatpak/flatpak/commit/a9107feeb4b8275b78965b36bf21b92d5724699e
- https://bugzilla.redhat.com/show_bug.cgi?id=1695973
Frequently Asked Questions
What is the vulnerability ID for this security flaw?
The vulnerability ID for this security flaw is CVE-2019-10063.
What is the severity level of CVE-2019-10063?
CVE-2019-10063 has a severity level of critical with a value of 9.
Which versions of Flatpak are affected by CVE-2019-10063?
Flatpak versions before 1.0.8, 1.1.x before 1.1.4, 1.2.x before 1.2.5, and 1.3.x before 1.3.2 are affected by CVE-2019-10063.
How do I fix the CVE-2019-10063 vulnerability?
To fix the CVE-2019-10063 vulnerability, update Flatpak to version 1.3.2 or later.
Where can I find more information about CVE-2019-10063?
More information about CVE-2019-10063 can be found at the following references: [Reference 1](https://access.redhat.com/errata/RHSA-2019:1024), [Reference 2](https://access.redhat.com/errata/RHSA-2019:1143), [Reference 3](https://github.com/flatpak/flatpak/issues/2782).
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