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CVE-2019-10063

9.0 · CRITICAL

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 Mar 26, 2019CWE-20EPSS 1.91%

Overview

CVE-2019-10063 is a critical-severity vulnerability. It was published on March 26, 2019 and has a CVSS 3.0 base score of 9.0 (CRITICAL).

This vulnerability has a CVSS 3.0 base score of 9.0, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refaccess.redhat.com/errata/RHSA-2019:1024Refaccess.redhat.com/errata/RHSA-2019:1143GitHubgithub.com/flatpak/flatpak/issues/2782Refaccess.redhat.com/errata/RHSA-2019:1024Refaccess.redhat.com/errata/RHSA-2019:1143GitHubgithub.com/flatpak/flatpak/issues/2782

How CyberStrike helps

Frequently asked questions

What is CVE-2019-10063?

CVE-2019-10063 is a critical-severity vulnerability. It was published on March 26, 2019 and has a CVSS 3.0 base score of 9.0 (CRITICAL).

How severe is CVE-2019-10063?

This vulnerability has a CVSS 3.0 base score of 9.0, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2019-10063?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2019-10063?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2019-10063 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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