This is an OpenPGP/MIME signed message (RFC 4880 and 3156)
--===============3155672186388672971==
Content-Type: multipart/signed; micalg=pgp-sha512;
 protocol="application/pgp-signature";
 boundary="OltnDPiOir9eqBi4krWUUKfkMLs7Lipcf"

This is an OpenPGP/MIME signed message (RFC 4880 and 3156)
--OltnDPiOir9eqBi4krWUUKfkMLs7Lipcf
Content-Type: text/plain; charset=utf-
Content-Transfer-Encoding: quoted-printable

==========================================================================
Ubuntu Security Notice USN-2861-1
January 06, 2016

libpng vulnerabilities
==========================================================================

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

- Ubuntu 15.10
- Ubuntu 15.04
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS

Summary:

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

Software Description:
- libpng: PNG (Portable Network Graphics) file library

Details:

It was discovered that libpng incorrectly handled certain small bit-depth
values. If a user or automated system using libpng were tricked into
opening a specially crafted image, an attacker could exploit this to cause
a denial of service or execute code with the privileges of the user
invoking the program. (CVE-2015-8472)

Qixue Xiao and Chen Yu discovered that libpng incorrectly handled certain
malformed images. If a user or automated system using libpng were tricked
into opening a specially crafted image, an attacker could exploit this to
cause a denial of service. (CVE-2015-8540)

Update instructions:

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

Ubuntu 15.10:
  libpng12-0                      1.2.51-0ubuntu3.15.10.2

Ubuntu 15.04:
  libpng12-0                      1.2.51-0ubuntu3.15.04.2

Ubuntu 14.04 LTS:
  libpng12-0                      1.2.50-1ubuntu2.14.04.2

Ubuntu 12.04 LTS:
  libpng12-0                      1.2.46-3ubuntu4.2

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

References:
  http://www.ubuntu.com/usn/usn-2861-1
  CVE-2015-8472, CVE-2015-8540

Package Information:
  https://launchpad.net/ubuntu/+source/libpng/1.2.51-0ubuntu3.15.10.2
  https://launchpad.net/ubuntu/+source/libpng/1.2.51-0ubuntu3.15.04.2
  https://launchpad.net/ubuntu/+source/libpng/1.2.50-1ubuntu2.14.04.2
  https://launchpad.net/ubuntu/+source/libpng/1.2.46-3ubuntu4.2



--OltnDPiOir9eqBi4krWUUKfkMLs7Lipcf
Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: OpenPGP digital signature
Content-Disposition: attachment; filename="signature.asc"

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2
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=FBYt
-----END PGP SIGNATURE-----

--OltnDPiOir9eqBi4krWUUKfkMLs7Lipcf--


--===============3155672186388672971==
Content-Type: text/plain; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Content-Disposition: inline

-- 
ubuntu-security-announce mailing list
ubuntu-security-announce@lists.ubuntu.com
Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-security-announce

--===============3155672186388672971==--