Advisory Published

USN-6125-1: snapd vulnerability

First published: Wed May 31 2023(Updated: )

It was discovered that the snap sandbox did not restrict the use of the ioctl system call with a TIOCLINUX request. This could be exploited by a malicious snap to inject commands into the controlling terminal which would then be executed outside of the snap sandbox once the snap had exited. This could allow an attacker to execute arbitrary commands outside of the confined snap sandbox. Note: graphical terminal emulators like xterm, gnome-terminal and others are not affected - this can only be exploited when snaps are run on a virtual console.

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/snapd<2.59.1+23.04ubuntu1.1
2.59.1+23.04ubuntu1.1
=23.04
All of
ubuntu/snapd<2.58+22.10.1
2.58+22.10.1
=22.10
All of
ubuntu/snapd<2.58+22.04.1
2.58+22.04.1
=22.04
All of
ubuntu/snapd<2.58+20.04.1
2.58+20.04.1
=20.04
All of
ubuntu/snapd<2.58+18.04.1
2.58+18.04.1
=18.04
All of
ubuntu/snapd<2.54.3+16.04.0ubuntu0.1~esm6
2.54.3+16.04.0ubuntu0.1~esm6
=16.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the vulnerability ID for this snapd vulnerability?

    The vulnerability ID for this snapd vulnerability is USN-6125-1.

  • What is the description of the snapd vulnerability?

    The snap sandbox did not restrict the use of the ioctl system call with a TIOCLINUX request, allowing a malicious snap to inject commands into the controlling terminal.

  • What is the affected software for this vulnerability?

    The affected software for this vulnerability is Ubuntu with snapd versions 2.59.1+23.04ubuntu1.1, 2.58+22.10.1, 2.58+22.04.1, 2.58+20.04.1, 2.58+18.04.1, and 2.54.3+16.04.0ubuntu0.1~esm6.

  • How can this snapd vulnerability be exploited?

    This snapd vulnerability can be exploited by a malicious snap to inject commands into the controlling terminal, which will then be executed outside of the snap sandbox once the snap has exited.

  • Where can I find more information about this snapd vulnerability?

    More information about this snapd vulnerability can be found on the Ubuntu website and Launchpad.

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