A vulnerability classified as critical has been found in Flatpak up to 1.0.7/1.1.x/1.2.3/1.3.0. This affects some unknown functionality of the component Sandbox. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

The bug was discovered 03/25/2019. The weakness was published 03/26/2019 (Website). It is possible to read the advisory at access.redhat.com. This vulnerability is uniquely identified as CVE-2019-10063 since 03/26/2019. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $0-$5k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 256607 (CentOS Security Update for flatpak (CESA-2019:1024)).

Upgrading to version 1.0.8, 1.2.4 or 1.3.1 eliminates this vulnerability.

Similar entry is available at 99058.

Productinfo

Name

• Flatpak

Version

• 1.0
• 1.0.0
• 1.0.1
• 1.0.2
• 1.0.3
• 1.0.4
• 1.0.5
• 1.0.6
• 1.0.7
• 1.1
• 1.2
• 1.2.0
• 1.2.1
• 1.2.2
• 1.2.3
• 1.3

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CPE 2.2info

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