The following updates has been released for Ubuntu Linux:

Ubuntu Linux 12.04 ESM:
USN-3686-2: file vulnerabilities
Several security issues were fixed in file.

Ubuntu Linux 14.04 LTS:
USN-3694-1: NASM vulnerabilities
NASM could be made to crash or run programs if it opened a specially crafted file.

USN-3686-2: file vulnerabilities

==========================================================================
Ubuntu Security Notice USN-3686-2
June 28, 2018

file vulnerabilities
==========================================================================

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

- Ubuntu 12.04 ESM

Summary:

Several security issues were fixed in file.

Software Description:
- file: Tool to determine file types

Details:

USN-3686-1 fixed a vulnerability in file. This update provides
the corresponding update for Ubuntu 12.04 ESM.

Original advisory details:

 It was discovered that file incorrectly handled certain magic files.
 An attacker could use this issue with a specially crafted magic file
 to cause a denial of service, or possibly execute arbitrary code.
 (CVE-2015-8865)

 It was discovered that file incorrectly handled certain malformed ELF
 files. An attacker could use this issue to cause a denial of service.
 (CVE-2018-10360)

Update instructions:

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

Ubuntu 12.04 ESM:
  file 5.09-2ubuntu0.7
  libmagic1 5.09-2ubuntu0.7

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

References:
  https://usn.ubuntu.com/usn/usn-3686-2
  https://usn.ubuntu.com/usn/usn-3686-1
  CVE-2015-8865, CVE-2018-10360

USN-3694-1: NASM vulnerabilities

==========================================================================
Ubuntu Security Notice USN-3694-1
June 28, 2018

nasm vulnerabilities
==========================================================================

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

- Ubuntu 14.04 LTS

Summary:

NASM could be made to crash or run programs if it opened a specially
crafted file.

Software Description:
- nasm: General-purpose x86 assembler

Details:

It was discovered that NASM incorrectly handled certain source files. If a
user or automated system were tricked into processing a specially crafted
source file, a remote attacker could use these issues to cause NASM 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 14.04 LTS:
nasm 2.10.09-1ubuntu0.1

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

References:
https://usn.ubuntu.com/usn/usn-3694-1
CVE-2017-10686, CVE-2017-11111, CVE-2017-14228, CVE-2017-17810,
CVE-2017-17811, CVE-2017-17812, CVE-2017-17813, CVE-2017-17814,
CVE-2017-17815, CVE-2017-17816, CVE-2017-17817, CVE-2017-17818,
CVE-2017-17819, CVE-2017-17820, CVE-2018-8881

Package Information:
https://launchpad.net/ubuntu/+source/nasm/2.10.09-1ubuntu0.1