The following updates has been released for Ubuntu Linux:

USN-3811-3: SpamAssassin vulnerabilities
USN-3838-1: LibRaw vulnerabilities

USN-3811-3: SpamAssassin vulnerabilities

==========================================================================
Ubuntu Security Notice USN-3811-3
December 05, 2018

spamassassin vulnerabilities
==========================================================================

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

- Ubuntu 12.04 ESM

Summary:

Several security issues were fixed in SpamAssassin.

Software Description:
- spamassassin: Perl-based spam filter using text analysis

Details:

USN-3811-1 fixed a vulnerability in spamassassin. This update provides
the corresponding update for Ubuntu 12.04 ESM.

Original advisory details:

 It was discovered that SpamAssassin incorrectly handled the PDFInfo
 plugin. A remote attacker could possibly use this issue to execute
 arbitrary code. (CVE-2018-11780)

 It was discovered that SpamAssassin incorrectly handled meta rule
 syntax. A local attacker could possibly use this issue to execute
 arbitrary code. (CVE-2018-11781)

Update instructions:

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

Ubuntu 12.04 ESM:
  spamassassin 3.4.2-0ubuntu0.12.04.2

This update uses a new upstream release, which includes additional bug
fixes. In general, a standard system update will make all the necessary
changes.

References:
  https://usn.ubuntu.com/usn/usn-3811-3
  https://usn.ubuntu.com/usn/usn-3811-1
  CVE-2018-11780, CVE-2018-11781

USN-3838-1: LibRaw vulnerabilities

=========================================================================
Ubuntu Security Notice USN-3838-1
December 06, 2018

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

- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

LibRaw could be made to crash or run programs as your login if it
opened a
specially crafted file.

Software Description:
- libraw: raw image decoder library

Details:

It was discovered that LibRaw incorrectly handled photo files. If
a user or
automated system were tricked into processing a specially crafted
photo file, a
remote attacker could cause applications linked against LibRaw to
crash,
resulting in a denial of service, or possibly execute arbitrary
code.

Update instructions:

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

Ubuntu 18.04 LTS:
libraw16 0.18.8-1ubuntu0.2

Ubuntu 16.04 LTS:
libraw15 0.17.1-1ubuntu0.4

Ubuntu 14.04 LTS:
libraw9 0.15.4-1ubuntu0.3

After a standard system update you need to restart your session to
make all the
necessary changes.

References:
https://usn.ubuntu.com/usn/usn-3838-1
CVE-2018-5807, CVE-2018-5810, CVE-2018-5811, CVE-2018-5812,
CVE-2018-5813, CVE-2018-5815, CVE-2018-5816

Package Information:
https://launchpad.net/ubuntu/+source/libraw/0.18.8-1ubuntu0.2
https://launchpad.net/ubuntu/+source/libraw/0.17.1-1ubuntu0.4
https://launchpad.net/ubuntu/+source/libraw/0.15.4-1ubuntu0.3