This is an OpenPGP/MIME signed message (RFC 4880 and 3156)
--===============6783851570918643933==
Content-Type: multipart/signed; micalg=pgp-sha512;
 protocol="application/pgp-signature";
 boundary="5DKoUSX4mE3DARlgLv3E1lVdFVHoGsPWA"

This is an OpenPGP/MIME signed message (RFC 4880 and 3156)
--5DKoUSX4mE3DARlgLv3E1lVdFVHoGsPWA
Content-Type: text/plain; charset=utf-
Content-Transfer-Encoding: quoted-printable

==========================================================================
Ubuntu Security Notice USN-2684-1
July 23, 2015

linux vulnerabilities
==========================================================================

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

- Ubuntu 15.04

Summary:

Several security issues were fixed in the kernel.

Software Description:
- linux: Linux kernel

Details:

A flaw was discovered in the kvm (kernel virtual machine) subsystem's
kvm_apic_has_events function. A unprivileged local user could exploit this
flaw to cause a denial of service (system crash). (CVE-2015-4692)

Daniel Borkmann reported a kernel crash in the Linux kernel's BPF filter
JIT optimization. A local attacker could exploit this flaw to cause a
denial of service (system crash). (CVE-2015-4700)

A flaw was discovered in how the Linux kernel handles invalid UDP
checksums. A remote attacker could exploit this flaw to cause a denial of
service using a flood of UDP packets with invalid checksums.
(CVE-2015-5364)

A flaw was discovered in how the Linux kernel handles invalid UDP
checksums. A remote attacker can cause a denial of service against
applications that use epoll by injecting a single packet with an invalid
checksum. (CVE-2015-5366)

Update instructions:

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

Ubuntu 15.04:
  linux-image-3.19.0-23-generic   3.19.0-23.24
  linux-image-3.19.0-23-generic-lpae  3.19.0-23.24
  linux-image-3.19.0-23-lowlatency  3.19.0-23.24
  linux-image-3.19.0-23-powerpc-e500mc  3.19.0-23.24
  linux-image-3.19.0-23-powerpc-smp  3.19.0-23.24
  linux-image-3.19.0-23-powerpc64-emb  3.19.0-23.24
  linux-image-3.19.0-23-powerpc64-smp  3.19.0-23.24

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

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed. If
you use linux-restricted-modules, you have to update that package as
well to get modules which work with the new kernel version. Unless you
manually uninstalled the standard kernel metapackages (e.g. linux-generic,
linux-server, linux-powerpc), a standard system upgrade will automatically
perform this as well.

References:
  http://www.ubuntu.com/usn/usn-2684-1
  CVE-2015-4692, CVE-2015-4700, CVE-2015-5364, CVE-2015-5366

Package Information:
  https://launchpad.net/ubuntu/+source/linux/3.19.0-23.24



--5DKoUSX4mE3DARlgLv3E1lVdFVHoGsPWA
Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: OpenPGP digital signature
Content-Disposition: attachment; filename="signature.asc"

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1

iQIcBAEBCgAGBQJVsYOgAAoJEAUvNnAY1cPYMdMP/RnQOO9djrTfImx021/6Ialw
oNeZTUyEa1XF3uYcXkTglKwl56JhUVI6MeX2mSJ4Kr97kLrUGO1ARh6sqF6kWRX4
rh7IuUEKkHK68wYwq+tDFcxLKBp6ZzaYsujLv0CcaJtPbbF2lSuwfnjhXk+gi9W4
wtCuI5++YFuW/eFkTvaKd1fb6kUCcJD2dfN0Fzk82IfUkxuOG+qTdgJHs7Yy0Ea9
gOc72VTxKoD5QpQN4s7QLItoAInsdhIAhfBLXeDj1m77FFtlNmwJ6266XAfljRdo
V4KkAoSPVtehWgxU2QzkcjHcC5+YWYQ3OUNn3TZUeX9xccmhNS9u9Lxr2ccq93c4
kewTq2+j8lPFfCDs2LK2CP5yVon9sgho7VFtnvO1oO6IWNch1pwXzzfC23BTLTM9
I95aV9X0QsVTDRhBzH107HUUD9q9tkjbu+ZyiYi3Z6KIrwMFCLy4w1OGlRo4Cr/0
GvcKOnZzJQ3DG6dvqsVUZaoQ+dp3/EggG6qGJk6K0MpEqcHIya6F0o4iuE6K2YB9
moMJP8ABp1GPtyXD8PkoNnFPCHbPViVivqnF1dOl/QiJYWavCwZyao5UtWRcDe8j
3gWdDuME/0XM0hzoQzaNA+QnP0gsrVGjmY2j4OSQgA5pAJNmiB0T7ktCbpvJfW1D
1jA/wa5zHhezSBhpDMCk
=QQK+
-----END PGP SIGNATURE-----

--5DKoUSX4mE3DARlgLv3E1lVdFVHoGsPWA--


--===============6783851570918643933==
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

--===============6783851570918643933==--