The following updates has been released for Ubuntu Linux:
USN-3976-3: Samba regression
USN-3976-4: Samba vulnerability
USN-3994-1: gnome-desktop vulnerability
USN-3976-3: Samba regression
USN-3976-4: Samba vulnerability
USN-3994-1: gnome-desktop vulnerability
USN-3976-3: Samba regression
==========================================================================
Ubuntu Security Notice USN-3976-3
May 27, 2019
samba regression
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
Summary:
USN-3976-1 introduced a regression in Samba.
Software Description:
- samba: SMB/CIFS file, print, and login server for Unix
Details:
USN-3976-1 fixed a vulnerability in Samba. The update introduced a
regression causing Samba to occasionally crash. This update fixes the
problem.
We apologize for the inconvenience.
Original advisory details:
Isaac Boukris and Andrew Bartlett discovered that Samba incorrectly checked
S4U2Self packets. In certain environments, a remote attacker could possibly
use this issue to escalate privileges.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 18.04 LTS:
samba 2:4.7.6+dfsg~ubuntu-0ubuntu2.11
Ubuntu 16.04 LTS:
samba 2:4.3.11+dfsg-0ubuntu0.16.04.21
In general, a standard system update will make all the necessary changes.
References:
https://usn.ubuntu.com/usn/usn-3976-3
https://usn.ubuntu.com/usn/usn-3976-1
https://launchpad.net/bugs/1827924
Package Information:
https://launchpad.net/ubuntu/+source/samba/2:4.7.6+dfsg~ubuntu-0ubuntu2.11
https://launchpad.net/ubuntu/+source/samba/2:4.3.11+dfsg-0ubuntu0.16.04.21
USN-3976-4: Samba vulnerability
==========================================================================
Ubuntu Security Notice USN-3976-4
May 27, 2019
samba vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 14.04 ESM
Summary:
USN-3976-1 introduced a regression in Samba.
Software Description:
- samba: SMB/CIFS file, print, and login server for Unix
Details:
USN-3976-1 fixed a vulnerability in Samba. The update introduced a
regression causing Samba to occasionally crash. This update fixes the
problem.
Original advisory details:
Isaac Boukris and Andrew Bartlett discovered that Samba incorrectly
checked S4U2Self packets. In certain environments, a remote attacker
could possibly use this issue to escalate privileges.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 14.04 ESM:
samba 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm2
In general, a standard system update will make all the necessary
changes.
References:
https://usn.ubuntu.com/usn/usn-3976-4
https://usn.ubuntu.com/usn/usn-3976-1
https://launchpad.net/bugs/1827924
USN-3994-1: gnome-desktop vulnerability
==========================================================================
Ubuntu Security Notice USN-3994-1
May 27, 2019
gnome-desktop3 vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 19.04
- Ubuntu 18.10
- Ubuntu 18.04 LTS
Summary:
gnome-desktop could be made to escape the thumbnailer sandbox.
Software Description:
- gnome-desktop3: Introspection data for GnomeDesktop
Details:
It was discovered that gnome-desktop incorrectly confined thumbnailers. If
a user were tricked into downloading a malicious image file, a remote
attacker could possibly combine this issue with another vulnerability to
escape the sandbox and execute arbitrary code.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 19.04:
libgnome-desktop-3-17 3.32.1-1ubuntu1.1
Ubuntu 18.10:
libgnome-desktop-3-17 3.30.1-1ubuntu1.1
Ubuntu 18.04 LTS:
libgnome-desktop-3-17 3.28.2-0ubuntu1.3
After a standard system update you need to restart your session to make all
the necessary changes.
References:
https://usn.ubuntu.com/usn/usn-3994-1
CVE-2019-11460
Package Information:
https://launchpad.net/ubuntu/+source/gnome-desktop3/3.32.1-1ubuntu1.1
https://launchpad.net/ubuntu/+source/gnome-desktop3/3.30.1-1ubuntu1.1
https://launchpad.net/ubuntu/+source/gnome-desktop3/3.28.2-0ubuntu1.3
