CVE-2023-28100 TIOCLINUX can send commands outside sandbox if running on a virtual console

2023-03-1615:51:32

CWE-20

GitHub_M

www.cve.org

flatpak

vulnerability

sandbox

linux

virtual console

10 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

9.3 High

AI Score

Confidence

High

0.008 Low

EPSS

Percentile

81.6%

JSON

Flatpak is a system for building, distributing, and running sandboxed desktop applications on Linux. Versions prior to 1.10.8, 1.12.8, 1.14.4, and 1.15.4 contain a vulnerability similar to CVE-2017-5226, but using the TIOCLINUX ioctl command instead of TIOCSTI. If a Flatpak app is run on a Linux virtual console such as /dev/tty1, it can copy text from the virtual console and paste it into the command buffer, from which the command might be run after the Flatpak app has exited. Ordinary graphical terminal emulators like xterm, gnome-terminal and Konsole are unaffected. This vulnerability is specific to the Linux virtual consoles /dev/tty1, /dev/tty2 and so on. A patch is available in versions 1.10.8, 1.12.8, 1.14.4, and 1.15.4. As a workaround, don’t run Flatpak on a Linux virtual console. Flatpak is primarily designed to be used in a Wayland or X11 graphical environment.

CNA Affected

[
  {
    "vendor": "flatpak",
    "product": "flatpak",
    "versions": [
      {
        "version": "< 1.10.8",
        "status": "affected"
      },
      {
        "version": ">= 1.12.0, < 1.12.8",
        "status": "affected"
      },
      {
        "version": ">= 1.14.0, < 1.14.4",
        "status": "affected"
      },
      {
        "version": ">= 1.15.0, < 1.15.4",
        "status": "affected"
      }
    ]
  }
]