Packages
- snapd - Daemon and tooling that enable snap packages
Details
The snapd default seccomp filter for strict mode snaps blocks the use of
the ioctl() system call when used with TIOCSTI as the second argument to
the system call. Jann Horn discovered that this restriction could be
circumvented on 64 bit architectures. A malicious snap could exploit this
to bypass intended access restrictions to insert characters into the
terminal's input queue. On Ubuntu, snapd typically will have already
automatically refreshed itself to snapd 2.37.4 which is unaffected.
The snapd default seccomp filter for strict mode snaps blocks the use of
the ioctl() system call when used with TIOCSTI as the second argument to
the system call. Jann Horn discovered that this restriction could be
circumvented on 64 bit architectures. A malicious snap could exploit this
to bypass intended access restrictions to insert characters into the
terminal's input queue. On Ubuntu, snapd typically will have already
automatically refreshed itself to snapd 2.37.4 which is unaffected.
Update instructions
In general, a standard system update will make all the necessary changes.
Learn more about how to get the fixes.The problem can be corrected by updating your system to the following package versions:
| Ubuntu Release | Package Version | ||
|---|---|---|---|
| 18.10 cosmic | snapd – 2.37.4+18.10.1 | ||
| 18.04 bionic | snapd – 2.37.4+18.04.1 | ||
| 16.04 xenial | snapd – 2.37.4ubuntu0.1 | ||
| 14.04 trusty | snapd – 2.37.4~14.04.1 | ||
Reduce your security exposure
Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.