Improper input validation in Flatpak
CVE-2019-10063
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.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.0 (Critical). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.019 (79.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 79th percentile — 79.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.019 · newest: 0.019 · change: 0.000
Affected products
- Flatpak — versions 1.3.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/flatpak/flatpak/issues/2782 (Patch, Third Party Advisory, Issue Tracking)
- access.redhat.com/errata/RHSA-2019:1024 (vendor-advisory)
- access.redhat.com/errata/RHSA-2019:1143 (vendor-advisory)
Frequently asked questions
- What is CVE-2019-10063?
- CVE-2019-10063 is a critical-severity vulnerability in Flatpak, classified under Improper Input Validation. CVSS score: 9.0/10. Published 2019-03-26.
- How severe is CVE-2019-10063?
- Critical severity. CVSS v3 base score is 9.0 out of 10.
- Is CVE-2019-10063 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.