The following updates has been released for Ubuntu Linux:

USN-3814-2: ClamAV vulnerabilities
USN-3815-2: gettext vulnerability
USN-3816-1: systemd vulnerabilities

USN-3814-2: ClamAV vulnerabilities

=========================================================================
Ubuntu Security Notice USN-3814-2
November 13, 2018

clamav vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its
derivatives:

- Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in ClamAV.

Software Description:
- clamav: Anti-virus utility for Unix

Details:

USN-3814-1 fixed several vulnerabilities in libmspack. In Ubuntu
14.04
libmspack is included into ClamAV. This update provides the
corresponding update for Ubuntu 14.04 LTS.

Original advisory details:

It was discovered libmspack incorrectly handled certain malformed
CAB files.
A remote attacker could use this issue to cause libmspack to
crash, resulting
in a denial of service. (CVE-2018-18584, CVE-2018-18585)

Update instructions:

The problem can be corrected by updating your system to the
following
package versions:

Ubuntu 14.04 LTS:
clamav 0.100.2+dfsg-1ubuntu0.14.04.2

In general, a standard system update will make all the necessary
changes.

References:
https://usn.ubuntu.com/usn/usn-3814-2
https://usn.ubuntu.com/usn/usn-3814-1
CVE-2018-18584, CVE-2018-18585

Package Information:
https://launchpad.net/ubuntu/+source/clamav/0.100.2+dfsg-1ubuntu0.14.04.2

USN-3815-2: gettext vulnerability

==========================================================================
Ubuntu Security Notice USN-3815-2
November 12, 2018

gettext vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 12.04 ESM

Summary:

gettext could be made to execute arbitrary code if it received
a specially crafted message.

Software Description:
- gettext: GNU Internationalization utilities

Details:

USN-3815-1 fixed a vulnerability in gettext. This update provides
the corresponding update for Ubuntu 12.04 ESM.

Original advisory details:

 It was discovered that gettext incorrectly handled certain messages.
 An attacker could possibly use this issue to execute arbitrary code.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 12.04 ESM:
  gettext 0.18.1.1-5ubuntu3.1

In general, a standard system update will make all the necessary
changes.

References:
  https://usn.ubuntu.com/usn/usn-3815-2
  https://usn.ubuntu.com/usn/usn-3815-1
  CVE-2018-18751

USN-3816-1: systemd vulnerabilities

==========================================================================
Ubuntu Security Notice USN-3816-1
November 12, 2018

systemd vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 18.10
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in systemd.

Software Description:
- systemd: system and service manager

Details:

Jann Horn discovered that unit_deserialize incorrectly handled status messages
above a certain length. A local attacker could potentially exploit this via
NotifyAccess to inject arbitrary state across re-execution and obtain root
privileges. (CVE-2018-15686)

Jann Horn discovered a race condition in chown_one(). A local attacker
could potentially exploit this by setting arbitrary permissions on certain
files to obtain root privileges. This issue only affected Ubuntu 18.04 LTS
and Ubuntu 18.10. (CVE-2018-15687)

It was discovered that systemd-tmpfiles mishandled symlinks in
non-terminal path components. A local attacker could potentially exploit
this by gaining ownership of certain files to obtain root privileges. This
issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2018-6954)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 18.10:
systemd 239-7ubuntu10.3

Ubuntu 18.04 LTS:
systemd 237-3ubuntu10.6

Ubuntu 16.04 LTS:
systemd 229-4ubuntu21.8

After a standard system update you need to reboot your computer to make
all the necessary changes.

References:
https://usn.ubuntu.com/usn/usn-3816-1
CVE-2018-15686, CVE-2018-15687, CVE-2018-6954

Package Information:
https://launchpad.net/ubuntu/+source/systemd/239-7ubuntu10.3
https://launchpad.net/ubuntu/+source/systemd/237-3ubuntu10.6
https://launchpad.net/ubuntu/+source/systemd/229-4ubuntu21.8