==========================================================================
Ubuntu Security Notice USN-2946-1
April 06, 2016

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

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

– Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in the kernel.

Software Description:
– linux: Linux kernel

Details:

Venkatesh Pottem discovered a use-after-free vulnerability in the Linux
kernel’s CXGB3 driver. A local attacker could use this to cause a denial of
service (system crash) or possibly execute arbitrary code. (CVE-2015-8812)

Xiaofei Rex Guo discovered a timing side channel vulnerability in the Linux
Extended Verification Module (EVM). An attacker could use this to affect
system integrity. (CVE-2016-2085)

David Herrmann discovered that the Linux kernel incorrectly accounted file
descriptors to the original opener for in-flight file descriptors sent over
a unix domain socket. A local attacker could use this to cause a denial of
service (resource exhaustion). (CVE-2016-2550)

It was discovered that the Linux kernel did not enforce limits on the
amount of data allocated to buffer pipes. A local attacker could use this
to cause a denial of service (resource exhaustion). (CVE-2016-2847)

Update instructions:

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

Ubuntu 14.04 LTS:
linux-image-3.13.0-85-generic 3.13.0-85.129
linux-image-3.13.0-85-generic-lpae 3.13.0-85.129
linux-image-3.13.0-85-lowlatency 3.13.0-85.129
linux-image-3.13.0-85-powerpc-e500 3.13.0-85.129
linux-image-3.13.0-85-powerpc-e500mc 3.13.0-85.129
linux-image-3.13.0-85-powerpc-smp 3.13.0-85.129
linux-image-3.13.0-85-powerpc64-emb 3.13.0-85.129
linux-image-3.13.0-85-powerpc64-smp 3.13.0-85.129

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.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References:
http://www.ubuntu.com/usn/usn-2946-1
CVE-2015-8812, CVE-2016-2085, CVE-2016-2550, CVE-2016-2847

Package Information:
https://launchpad.net/ubuntu/+source/linux/3.13.0-85.129

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==========================================================================
Ubuntu Security Notice USN-2946-2
April 06, 2016

linux-lts-trusty vulnerabilities
==========================================================================

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

– Ubuntu 12.04 LTS

Summary:

Several security issues were fixed in the kernel.

Software Description:
– linux-lts-trusty: Linux hardware enablement kernel from Trusty for Precise

Details:

Venkatesh Pottem discovered a use-after-free vulnerability in the Linux
kernel’s CXGB3 driver. A local attacker could use this to cause a denial of
service (system crash) or possibly execute arbitrary code. (CVE-2015-8812)

Xiaofei Rex Guo discovered a timing side channel vulnerability in the Linux
Extended Verification Module (EVM). An attacker could use this to affect
system integrity. (CVE-2016-2085)

David Herrmann discovered that the Linux kernel incorrectly accounted file
descriptors to the original opener for in-flight file descriptors sent over
a unix domain socket. A local attacker could use this to cause a denial of
service (resource exhaustion). (CVE-2016-2550)

It was discovered that the Linux kernel did not enforce limits on the
amount of data allocated to buffer pipes. A local attacker could use this
to cause a denial of service (resource exhaustion). (CVE-2016-2847)

Update instructions:

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

Ubuntu 12.04 LTS:
linux-image-3.13.0-85-generic 3.13.0-85.129~precise1
linux-image-3.13.0-85-generic-lpae 3.13.0-85.129~precise1

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.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References:
http://www.ubuntu.com/usn/usn-2946-2
http://www.ubuntu.com/usn/usn-2946-1
CVE-2015-8812, CVE-2016-2085, CVE-2016-2550, CVE-2016-2847

Package Information:
https://launchpad.net/ubuntu/+source/linux-lts-trusty/3.13.0-85.129~precise1

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==========================================================================
Ubuntu Security Notice USN-2947-1
April 06, 2016

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

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

– Ubuntu 15.10

Summary:

Several security issues were fixed in the kernel.

Software Description:
– linux: Linux kernel

Details:

Ralf Spenneberg discovered that the usbvision driver in the Linux kernel
did not properly sanity check the interfaces and endpoints reported by the
device. An attacker with physical access could cause a denial of service
(system crash). (CVE-2015-7833)

Venkatesh Pottem discovered a use-after-free vulnerability in the Linux
kernel’s CXGB3 driver. A local attacker could use this to cause a denial of
service (system crash) or possibly execute arbitrary code. (CVE-2015-8812)

Xiaofei Rex Guo discovered a timing side channel vulnerability in the Linux
Extended Verification Module (EVM). An attacker could use this to affect
system integrity. (CVE-2016-2085)

It was discovered that the extended Berkeley Packet Filter (eBPF)
implementation in the Linux kernel did not correctly compute branch offsets
for backward jumps after ctx expansion. A local attacker could use this to
cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2016-2383)

David Herrmann discovered that the Linux kernel incorrectly accounted file
descriptors to the original opener for in-flight file descriptors sent over
a unix domain socket. A local attacker could use this to cause a denial of
service (resource exhaustion). (CVE-2016-2550)

It was discovered that the Linux kernel did not enforce limits on the
amount of data allocated to buffer pipes. A local attacker could use this
to cause a denial of service (resource exhaustion). (CVE-2016-2847)

Update instructions:

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

Ubuntu 15.10:
linux-image-4.2.0-35-generic 4.2.0-35.40
linux-image-4.2.0-35-generic-lpae 4.2.0-35.40
linux-image-4.2.0-35-lowlatency 4.2.0-35.40
linux-image-4.2.0-35-powerpc-e500mc 4.2.0-35.40
linux-image-4.2.0-35-powerpc-smp 4.2.0-35.40
linux-image-4.2.0-35-powerpc64-emb 4.2.0-35.40
linux-image-4.2.0-35-powerpc64-smp 4.2.0-35.40

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.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References:
http://www.ubuntu.com/usn/usn-2947-1
CVE-2015-7833, CVE-2015-8812, CVE-2016-2085, CVE-2016-2383,
CVE-2016-2550, CVE-2016-2847

Package Information:
https://launchpad.net/ubuntu/+source/linux/4.2.0-35.40

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==========================================================================
Ubuntu Security Notice USN-2947-2
April 06, 2016

linux-lts-wily vulnerabilities
==========================================================================

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

– Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in the kernel.

Software Description:
– linux-lts-wily: Linux hardware enablement kernel from Wily for Trusty

Details:

Ralf Spenneberg discovered that the usbvision driver in the Linux kernel
did not properly sanity check the interfaces and endpoints reported by the
device. An attacker with physical access could cause a denial of service
(system crash). (CVE-2015-7833)

Venkatesh Pottem discovered a use-after-free vulnerability in the Linux
kernel’s CXGB3 driver. A local attacker could use this to cause a denial of
service (system crash) or possibly execute arbitrary code. (CVE-2015-8812)

Xiaofei Rex Guo discovered a timing side channel vulnerability in the Linux
Extended Verification Module (EVM). An attacker could use this to affect
system integrity. (CVE-2016-2085)

It was discovered that the extended Berkeley Packet Filter (eBPF)
implementation in the Linux kernel did not correctly compute branch offsets
for backward jumps after ctx expansion. A local attacker could use this to
cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2016-2383)

David Herrmann discovered that the Linux kernel incorrectly accounted file
descriptors to the original opener for in-flight file descriptors sent over
a unix domain socket. A local attacker could use this to cause a denial of
service (resource exhaustion). (CVE-2016-2550)

It was discovered that the Linux kernel did not enforce limits on the
amount of data allocated to buffer pipes. A local attacker could use this
to cause a denial of service (resource exhaustion). (CVE-2016-2847)

Update instructions:

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

Ubuntu 14.04 LTS:
linux-image-4.2.0-35-generic 4.2.0-35.40~14.04.1
linux-image-4.2.0-35-generic-lpae 4.2.0-35.40~14.04.1
linux-image-4.2.0-35-lowlatency 4.2.0-35.40~14.04.1
linux-image-4.2.0-35-powerpc-e500mc 4.2.0-35.40~14.04.1
linux-image-4.2.0-35-powerpc-smp 4.2.0-35.40~14.04.1
linux-image-4.2.0-35-powerpc64-emb 4.2.0-35.40~14.04.1
linux-image-4.2.0-35-powerpc64-smp 4.2.0-35.40~14.04.1

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.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References:
http://www.ubuntu.com/usn/usn-2947-2
http://www.ubuntu.com/usn/usn-2947-1
CVE-2015-7833, CVE-2015-8812, CVE-2016-2085, CVE-2016-2383,
CVE-2016-2550, CVE-2016-2847

Package Information:
https://launchpad.net/ubuntu/+source/linux-lts-wily/4.2.0-35.40~14.04.1

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==========================================================================
Ubuntu Security Notice USN-2948-1
April 06, 2016

linux-lts-utopic vulnerabilities
==========================================================================

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

– Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in the kernel.

Software Description:
– linux-lts-utopic: Linux hardware enablement kernel from Utopic for Trusty

Details:

Ralf Spenneberg discovered that the USB driver for Clie devices in the
Linux kernel did not properly sanity check the endpoints reported by the
device. An attacker with physical access could cause a denial of service
(system crash). (CVE-2015-7566)

Ralf Spenneberg discovered that the usbvision driver in the Linux kernel
did not properly sanity check the interfaces and endpoints reported by the
device. An attacker with physical access could cause a denial of service
(system crash). (CVE-2015-7833)

Venkatesh Pottem discovered a use-after-free vulnerability in the Linux
kernel’s CXGB3 driver. A local attacker could use this to cause a denial of
service (system crash) or possibly execute arbitrary code. (CVE-2015-8812)

It was discovered that a race condition existed in the ioctl handler for
the TTY driver in the Linux kernel. A local attacker could use this to
cause a denial of service (system crash) or expose sensitive information.
(CVE-2016-0723)

Xiaofei Rex Guo discovered a timing side channel vulnerability in the Linux
Extended Verification Module (EVM). An attacker could use this to affect
system integrity. (CVE-2016-2085)

David Herrmann discovered that the Linux kernel incorrectly accounted file
descriptors to the original opener for in-flight file descriptors sent over
a unix domain socket. A local attacker could use this to cause a denial of
service (resource exhaustion). (CVE-2016-2550)

Ralf Spenneberg discovered that the USB driver for Treo devices in the
Linux kernel did not properly sanity check the endpoints reported by the
device. An attacker with physical access could cause a denial of service
(system crash). (CVE-2016-2782)

It was discovered that the Linux kernel did not enforce limits on the
amount of data allocated to buffer pipes. A local attacker could use this
to cause a denial of service (resource exhaustion). (CVE-2016-2847)

Update instructions:

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

Ubuntu 14.04 LTS:
linux-image-3.16.0-69-generic 3.16.0-69.89~14.04.1
linux-image-3.16.0-69-generic-lpae 3.16.0-69.89~14.04.1
linux-image-3.16.0-69-lowlatency 3.16.0-69.89~14.04.1
linux-image-3.16.0-69-powerpc-e500mc 3.16.0-69.89~14.04.1
linux-image-3.16.0-69-powerpc-smp 3.16.0-69.89~14.04.1
linux-image-3.16.0-69-powerpc64-emb 3.16.0-69.89~14.04.1
linux-image-3.16.0-69-powerpc64-smp 3.16.0-69.89~14.04.1

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.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References:
http://www.ubuntu.com/usn/usn-2948-1
CVE-2015-7566, CVE-2015-7833, CVE-2015-8812, CVE-2016-0723,
CVE-2016-2085, CVE-2016-2550, CVE-2016-2782, CVE-2016-2847

Package Information:
https://launchpad.net/ubuntu/+source/linux-lts-utopic/3.16.0-69.89~14.04.1

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==========================================================================
Ubuntu Security Notice USN-2949-1
April 06, 2016

linux-lts-vivid vulnerabilities
==========================================================================

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

– Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in the kernel.

Software Description:
– linux-lts-vivid: Linux hardware enablement kernel from Vivid for Trusty

Details:

Venkatesh Pottem discovered a use-after-free vulnerability in the Linux
kernel’s CXGB3 driver. A local attacker could use this to cause a denial of
service (system crash) or possibly execute arbitrary code. (CVE-2015-8812)

Xiaofei Rex Guo discovered a timing side channel vulnerability in the Linux
Extended Verification Module (EVM). An attacker could use this to affect
system integrity. (CVE-2016-2085)

David Herrmann discovered that the Linux kernel incorrectly accounted file
descriptors to the original opener for in-flight file descriptors sent over
a unix domain socket. A local attacker could use this to cause a denial of
service (resource exhaustion). (CVE-2016-2550)

It was discovered that the Linux kernel did not enforce limits on the
amount of data allocated to buffer pipes. A local attacker could use this
to cause a denial of service (resource exhaustion). (CVE-2016-2847)

Update instructions:

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

Ubuntu 14.04 LTS:
linux-image-3.19.0-58-generic 3.19.0-58.64~14.04.1
linux-image-3.19.0-58-generic-lpae 3.19.0-58.64~14.04.1
linux-image-3.19.0-58-lowlatency 3.19.0-58.64~14.04.1
linux-image-3.19.0-58-powerpc-e500mc 3.19.0-58.64~14.04.1
linux-image-3.19.0-58-powerpc-smp 3.19.0-58.64~14.04.1
linux-image-3.19.0-58-powerpc64-emb 3.19.0-58.64~14.04.1
linux-image-3.19.0-58-powerpc64-smp 3.19.0-58.64~14.04.1

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.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References:
http://www.ubuntu.com/usn/usn-2949-1
CVE-2015-8812, CVE-2016-2085, CVE-2016-2550, CVE-2016-2847

Package Information:
https://launchpad.net/ubuntu/+source/linux-lts-vivid/3.19.0-58.64~14.04.1

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