Category Archives: Ubuntu

Ubuntu

USN-3291-3: Linux kernel (Xenial HWE) vulnerabilities

Ubuntu Security Notice USN-3291-3

17th May, 2017

linux-lts-xenial 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-xenial
    – Linux hardware enablement kernel from Xenial for Trusty

Details

USN-3291-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu
14.04 LTS.

Dmitry Vyukov discovered that the generic SCSI (sg) subsystem in the Linux
kernel contained a stack-based buffer overflow. A local attacker with
access to an sg device could use this to cause a denial of service (system
crash) or possibly execute arbitrary code. (CVE-2017-7187)

It was discovered that a NULL pointer dereference existed in the Direct
Rendering Manager (DRM) driver for VMWare devices in the Linux kernel. A
local attacker could use this to cause a denial of service (system crash).
(CVE-2017-7261)

Li Qiang discovered that an integer overflow vulnerability existed in the
Direct Rendering Manager (DRM) driver for VMWare devices in the Linux
kernel. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2017-7294)

It was discovered that an information leak existed in the set_mempolicy and
mbind compat syscalls in the Linux kernel. A local attacker could use this
to expose sensitive information (kernel memory). (CVE-2017-7616)

Update instructions

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

Ubuntu 14.04 LTS:
linux-image-powerpc-smp-lts-xenial

4.4.0.78.63
linux-image-generic-lpae-lts-xenial

4.4.0.78.63
linux-image-4.4.0-78-generic-lpae

4.4.0-78.99~14.04.2
linux-image-4.4.0-78-powerpc64-emb

4.4.0-78.99~14.04.2
linux-image-4.4.0-78-powerpc-smp

4.4.0-78.99~14.04.2
linux-image-4.4.0-78-lowlatency

4.4.0-78.99~14.04.2
linux-image-lowlatency-lts-xenial

4.4.0.78.63
linux-image-generic-lts-xenial

4.4.0.78.63
linux-image-4.4.0-78-generic

4.4.0-78.99~14.04.2
linux-image-powerpc64-smp-lts-xenial

4.4.0.78.63
linux-image-powerpc64-emb-lts-xenial

4.4.0.78.63
linux-image-4.4.0-78-powerpc-e500mc

4.4.0-78.99~14.04.2
linux-image-powerpc-e500mc-lts-xenial

4.4.0.78.63
linux-image-4.4.0-78-powerpc64-smp

4.4.0-78.99~14.04.2

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

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

CVE-2017-7187,

CVE-2017-7261,

CVE-2017-7294,

CVE-2017-7616

Read More

USN-3291-1: Linux kernel vulnerabilities

Ubuntu Security Notice USN-3291-1

16th May, 2017

linux vulnerabilities

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

  • Ubuntu 16.04 LTS

Summary

Several security issues were fixed in the kernel.

Software description

  • linux
    – Linux kernel

Details

Dmitry Vyukov discovered that the generic SCSI (sg) subsystem in the Linux
kernel contained a stack-based buffer overflow. A local attacker with
access to an sg device could use this to cause a denial of service (system
crash) or possibly execute arbitrary code. (CVE-2017-7187)

It was discovered that a NULL pointer dereference existed in the Direct
Rendering Manager (DRM) driver for VMWare devices in the Linux kernel. A
local attacker could use this to cause a denial of service (system crash).
(CVE-2017-7261)

Li Qiang discovered that an integer overflow vulnerability existed in the
Direct Rendering Manager (DRM) driver for VMWare devices in the Linux
kernel. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2017-7294)

It was discovered that an information leak existed in the set_mempolicy and
mbind compat syscalls in the Linux kernel. A local attacker could use this
to expose sensitive information (kernel memory). (CVE-2017-7616)

Update instructions

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

Ubuntu 16.04 LTS:
linux-image-powerpc-smp

4.4.0.78.84
linux-image-powerpc-e500mc

4.4.0.78.84
linux-image-4.4.0-78-powerpc64-emb

4.4.0-78.99
linux-image-generic

4.4.0.78.84
linux-image-4.4.0-78-powerpc-smp

4.4.0-78.99
linux-image-4.4.0-78-generic

4.4.0-78.99
linux-image-4.4.0-78-lowlatency

4.4.0-78.99
linux-image-powerpc64-emb

4.4.0.78.84
linux-image-4.4.0-78-generic-lpae

4.4.0-78.99
linux-image-powerpc64-smp

4.4.0.78.84
linux-image-generic-lpae

4.4.0.78.84
linux-image-4.4.0-78-powerpc-e500mc

4.4.0-78.99
linux-image-lowlatency

4.4.0.78.84
linux-image-4.4.0-78-powerpc64-smp

4.4.0-78.99

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

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

CVE-2017-7187,

CVE-2017-7261,

CVE-2017-7294,

CVE-2017-7616

Read More

USN-3290-1: Linux kernel vulnerability

Ubuntu Security Notice USN-3290-1

16th May, 2017

linux vulnerability

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

  • Ubuntu 14.04 LTS

Summary

The system could be made to crash under certain conditions.

Software description

  • linux
    – Linux kernel

Details

Marco Grassi discovered that the TCP implementation in the Linux kernel
mishandles socket buffer (skb) truncation. A local attacker could use this
to cause a denial of service (system crash).

Update instructions

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

Ubuntu 14.04 LTS:
linux-image-3.13.0-119-powerpc64-smp

3.13.0-119.166
linux-image-powerpc-smp

3.13.0.119.129
linux-image-powerpc-e500mc

3.13.0.119.129
linux-image-3.13.0-119-powerpc-e500mc

3.13.0-119.166
linux-image-3.13.0-119-powerpc-e500

3.13.0-119.166
linux-image-generic

3.13.0.119.129
linux-image-3.13.0-119-generic-lpae

3.13.0-119.166
linux-image-3.13.0-119-powerpc-smp

3.13.0-119.166
linux-image-3.13.0-119-lowlatency

3.13.0-119.166
linux-image-powerpc-e500

3.13.0.119.129
linux-image-powerpc64-smp

3.13.0.119.129
linux-image-generic-lpae

3.13.0.119.129
linux-image-3.13.0-119-generic

3.13.0-119.166
linux-image-lowlatency

3.13.0.119.129

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

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

CVE-2016-8645

Read More

USN-3278-1: Thunderbird vulnerabilities

Ubuntu Security Notice USN-3278-1

16th May, 2017

thunderbird vulnerabilities

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

  • Ubuntu 17.04
  • Ubuntu 16.10
  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS

Summary

Several security issues were fixed in Thunderbird.

Software description

  • thunderbird
    – Mozilla Open Source mail and newsgroup client

Details

Multiple security issues were discovered in Thunderbird. If a user were
tricked in to opening a specially crafted message, an attacker could
potentially exploit these to read uninitialized memory, cause a denial of
service via application crash, or execute arbitrary code. (CVE-2017-5429,
CVE-2017-5430, CVE-2017-5436, CVE-2017-5443, CVE-2017-5444, CVE-2017-5445,
CVE-2017-5446, CVE-2017-5447, CVE-2017-5461, CVE-2017-5467)

Multiple security issues were discovered in Thunderbird. If a user were
tricked in to opening a specially crafted website in a browsing context,
an attacker could potentially exploit these to spoof the addressbar
contents, conduct cross-site scripting (XSS) attacks, cause a denial of
service via application crash, or execute arbitrary code. (CVE-2017-5432,
CVE-2017-5433, CVE-2017-5434, CVE-2017-5435, CVE-2017-5437, CVE-2017-5438,
CVE-2017-5439, CVE-2017-5440, CVE-2017-5441, CVE-2017-5442, CVE-2017-5449,
CVE-2017-5451, CVE-2017-5454, CVE-2017-5459, CVE-2017-5460, CVE-2017-5464,
CVE-2017-5465, CVE-2017-5466, CVE-2017-5469, CVE-2017-10195,
CVE-2017-10196, CVE-2017-10197)

A flaw was discovered in the DRBG number generation in NSS. If an
attacker were able to perform a man-in-the-middle attack, this flaw
could potentially be exploited to view sensitive information.
(CVE-2017-5462)

Update instructions

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

Ubuntu 17.04:
thunderbird

1:52.1.1+build1-0ubuntu0.17.04.1
Ubuntu 16.10:
thunderbird

1:52.1.1+build1-0ubuntu0.16.10.1
Ubuntu 16.04 LTS:
thunderbird

1:52.1.1+build1-0ubuntu0.16.04.1
Ubuntu 14.04 LTS:
thunderbird

1:52.1.1+build1-0ubuntu0.14.04.1

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

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

References

CVE-2017-10195,

CVE-2017-10196,

CVE-2017-10197,

CVE-2017-5429,

CVE-2017-5430,

CVE-2017-5432,

CVE-2017-5433,

CVE-2017-5434,

CVE-2017-5435,

CVE-2017-5436,

CVE-2017-5437,

CVE-2017-5438,

CVE-2017-5439,

CVE-2017-5440,

CVE-2017-5441,

CVE-2017-5442,

CVE-2017-5443,

CVE-2017-5444,

CVE-2017-5445,

CVE-2017-5446,

CVE-2017-5447,

CVE-2017-5449,

CVE-2017-5451,

CVE-2017-5454,

CVE-2017-5459,

CVE-2017-5460,

CVE-2017-5461,

CVE-2017-5462,

CVE-2017-5464,

CVE-2017-5465,

CVE-2017-5466,

CVE-2017-5467,

CVE-2017-5469

Read More

USN-3272-2: Ghostscript regression

Ubuntu Security Notice USN-3272-2

16th May, 2017

ghostscript regression

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

  • Ubuntu 17.04
  • Ubuntu 16.10
  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS

Summary

USN-3272-1 introduced a regression in Ghostscript.

Software description

  • ghostscript
    – PostScript and PDF interpreter

Details

USN-3272-1 fixed vulnerabilities in Ghostscript. This change introduced
a regression when the DELAYBIND feature is used with the eqproc
command. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

It was discovered that Ghostscript improperly handled parameters to
the rsdparams and eqproc commands. An attacker could use these to
craft a malicious document that could disable -dSAFER protections,
thereby allowing the execution of arbitrary code, or cause a denial
of service (application crash). (CVE-2017-8291)

Kamil Frankowicz discovered a use-after-free vulnerability in the
color management module of Ghostscript. An attacker could use this
to cause a denial of service (application crash). (CVE-2016-10217)

Kamil Frankowicz discovered a divide-by-zero error in the scan
conversion code in Ghostscript. An attacker could use this to cause
a denial of service (application crash). (CVE-2016-10219)

Kamil Frankowicz discovered multiple NULL pointer dereference errors in
Ghostscript. An attacker could use these to cause a denial of service
(application crash). (CVE-2016-10220, CVE-2017-5951, CVE-2017-7207)

Update instructions

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

Ubuntu 17.04:
ghostscript-x

9.19~dfsg+1-0ubuntu7.4
ghostscript

9.19~dfsg+1-0ubuntu7.4
libgs9

9.19~dfsg+1-0ubuntu7.4
libgs9-common

9.19~dfsg+1-0ubuntu7.4
Ubuntu 16.10:
ghostscript-x

9.19~dfsg+1-0ubuntu6.6
ghostscript

9.19~dfsg+1-0ubuntu6.6
libgs9

9.19~dfsg+1-0ubuntu6.6
libgs9-common

9.19~dfsg+1-0ubuntu6.6
Ubuntu 16.04 LTS:
ghostscript-x

9.18~dfsg~0-0ubuntu2.6
ghostscript

9.18~dfsg~0-0ubuntu2.6
libgs9

9.18~dfsg~0-0ubuntu2.6
libgs9-common

9.18~dfsg~0-0ubuntu2.6
Ubuntu 14.04 LTS:
ghostscript-x

9.10~dfsg-0ubuntu10.9
ghostscript

9.10~dfsg-0ubuntu10.9
libgs9

9.10~dfsg-0ubuntu10.9
libgs9-common

9.10~dfsg-0ubuntu10.9

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

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

References

LP: 1687614

Read More

USN-3289-1: QEMU vulnerabilities

Ubuntu Security Notice USN-3289-1

16th May, 2017

qemu vulnerabilities

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

  • Ubuntu 17.04
  • Ubuntu 16.10
  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS

Summary

Several security issues were fixed in QEMU.

Software description

  • qemu
    – Machine emulator and virtualizer

Details

Li Qiang discovered that QEMU incorrectly handled VirtFS directory sharing.
A privileged attacker inside the guest could use this issue to cause QEMU
to crash, resulting in a denial of service. (CVE-2017-7377, CVE-2017-8086)

Jiangxin discovered that QEMU incorrectly handled the Cirrus VGA device. A
privileged attacker inside the guest could use this issue to cause QEMU to
crash, resulting in a denial of service. (CVE-2017-7718)

Li Qiang and Jiangxin discovered that QEMU incorrectly handled the Cirrus
VGA device when being used with a VNC connection. A privileged attacker
inside the guest could use this issue to cause QEMU to crash, resulting in
a denial of service, or possibly execute arbitrary code on the host. In the
default installation, when QEMU is used with libvirt, attackers would be
isolated by the libvirt AppArmor profile. (CVE-2017-7980)

Jiang Xin discovered that QEMU incorrectly handled the audio subsystem. A
privileged attacker inside the guest could use this issue to cause QEMU to
crash, resulting in a denial of service. (CVE-2017-8309)

Jiang Xin discovered that QEMU incorrectly handled the input subsystem. A
privileged attacker inside the guest could use this issue to cause QEMU to
crash, resulting in a denial of service. This issue only affected Ubuntu
16.04 LTS, Ubuntu 16.10 and Ubuntu 17.04. (CVE-2017-8379)

Update instructions

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

Ubuntu 17.04:
qemu-system-misc

1:2.8+dfsg-3ubuntu2.2
qemu-system-s390x

1:2.8+dfsg-3ubuntu2.2
qemu-system

1:2.8+dfsg-3ubuntu2.2
qemu-system-aarch64

1:2.8+dfsg-3ubuntu2.2
qemu-system-x86

1:2.8+dfsg-3ubuntu2.2
qemu-system-sparc

1:2.8+dfsg-3ubuntu2.2
qemu-system-arm

1:2.8+dfsg-3ubuntu2.2
qemu-system-ppc

1:2.8+dfsg-3ubuntu2.2
qemu-system-mips

1:2.8+dfsg-3ubuntu2.2
Ubuntu 16.10:
qemu-system-misc

1:2.6.1+dfsg-0ubuntu5.5
qemu-system-s390x

1:2.6.1+dfsg-0ubuntu5.5
qemu-system

1:2.6.1+dfsg-0ubuntu5.5
qemu-system-aarch64

1:2.6.1+dfsg-0ubuntu5.5
qemu-system-x86

1:2.6.1+dfsg-0ubuntu5.5
qemu-system-sparc

1:2.6.1+dfsg-0ubuntu5.5
qemu-system-arm

1:2.6.1+dfsg-0ubuntu5.5
qemu-system-ppc

1:2.6.1+dfsg-0ubuntu5.5
qemu-system-mips

1:2.6.1+dfsg-0ubuntu5.5
Ubuntu 16.04 LTS:
qemu-system-misc

1:2.5+dfsg-5ubuntu10.14
qemu-system-s390x

1:2.5+dfsg-5ubuntu10.14
qemu-system

1:2.5+dfsg-5ubuntu10.14
qemu-system-aarch64

1:2.5+dfsg-5ubuntu10.14
qemu-system-x86

1:2.5+dfsg-5ubuntu10.14
qemu-system-sparc

1:2.5+dfsg-5ubuntu10.14
qemu-system-arm

1:2.5+dfsg-5ubuntu10.14
qemu-system-ppc

1:2.5+dfsg-5ubuntu10.14
qemu-system-mips

1:2.5+dfsg-5ubuntu10.14
Ubuntu 14.04 LTS:
qemu-system-misc

2.0.0+dfsg-2ubuntu1.34
qemu-system

2.0.0+dfsg-2ubuntu1.34
qemu-system-aarch64

2.0.0+dfsg-2ubuntu1.34
qemu-system-x86

2.0.0+dfsg-2ubuntu1.34
qemu-system-sparc

2.0.0+dfsg-2ubuntu1.34
qemu-system-arm

2.0.0+dfsg-2ubuntu1.34
qemu-system-ppc

2.0.0+dfsg-2ubuntu1.34
qemu-system-mips

2.0.0+dfsg-2ubuntu1.34

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

After a standard system update you need to restart all QEMU virtual
machines to make all the necessary changes.

References

CVE-2017-7377,

CVE-2017-7718,

CVE-2017-7980,

CVE-2017-8086,

CVE-2017-8309,

CVE-2017-8379

Read More

USN-3292-2: Linux kernel (HWE) vulnerability

Ubuntu Security Notice USN-3292-2

16th May, 2017

linux-hwe vulnerability

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

  • Ubuntu 16.04 LTS

Summary

The system could be made to crash or run programs as an administrator.

Software description

  • linux-hwe
    – Linux hardware enablement (HWE) kernel

Details

USN-3292-1 fixed a vulnerability in the Linux kernel for Ubuntu 16.10.
This update provides the corresponding updates for the Linux Hardware
Enablement (HWE) kernel from Ubuntu 16.10 for Ubuntu 16.04 LTS.

Jason Donenfeld discovered a heap overflow in the MACsec module in the
Linux kernel. An attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code.

Update instructions

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

Ubuntu 16.04 LTS:
linux-image-4.8.0-52-lowlatency

4.8.0-52.55~16.04.1
linux-image-generic-hwe-16.04

4.8.0.52.23
linux-image-4.8.0-52-generic-lpae

4.8.0-52.55~16.04.1
linux-image-lowlatency-hwe-16.04

4.8.0.52.23
linux-image-4.8.0-52-generic

4.8.0-52.55~16.04.1
linux-image-generic-lpae-hwe-16.04

4.8.0.52.23

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

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

CVE-2017-7477

Read More

USN-3292-1: Linux kernel vulnerability

Ubuntu Security Notice USN-3292-1

16th May, 2017

linux, linux-raspi2 vulnerability

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

  • Ubuntu 16.10

Summary

The system could be made to crash or run programs as an administrator.

Software description

  • linux
    – Linux kernel

  • linux-raspi2
    – Linux kernel for Raspberry Pi 2

Details

Jason Donenfeld discovered a heap overflow in the MACsec module in the
Linux kernel. An attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code.

Update instructions

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

Ubuntu 16.10:
linux-image-powerpc-smp 4.8.0.52.64
linux-image-powerpc-e500mc 4.8.0.52.64
linux-image-4.8.0-52-lowlatency

4.8.0-52.55
linux-image-generic-lpae 4.8.0.52.64
linux-image-4.8.0-52-generic

4.8.0-52.55
linux-image-4.8.0-52-generic-lpae

4.8.0-52.55
linux-image-4.8.0-52-powerpc64-emb

4.8.0-52.55
linux-image-generic 4.8.0.52.64
linux-image-4.8.0-52-powerpc-e500mc

4.8.0-52.55
linux-image-4.8.0-1036-raspi2

4.8.0-1036.39
linux-image-lowlatency 4.8.0.52.64
linux-image-powerpc64-emb 4.8.0.52.64
linux-image-raspi2 4.8.0.1036.40
linux-image-4.8.0-52-powerpc-smp

4.8.0-52.55

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

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

CVE-2017-7477

Read More

USN-3276-2: shadow regression

Ubuntu Security Notice USN-3276-2

16th May, 2017

shadow regression

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

  • Ubuntu 17.04
  • Ubuntu 16.10
  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS

Summary

USN-3276-1 introduced a regression in su.

Software description

  • shadow
    – system login tools

Details

USN-3276-1 intended to fix a vulnerability in su. The solution introduced
a regression in su signal handling. This update modifies the security fix.
We apologize for the inconvenience.

Original advisory details:

Sebastian Krahmer discovered integer overflows in shadow utilities.
A local attacker could possibly cause them to crash or potentially
gain privileges via crafted input. (CVE-2016-6252)

Tobias Stöckmann discovered a race condition in su. A local
attacker could cause su to send SIGKILL to other processes with
root privileges. (CVE-2017-2616)

Update instructions

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

Ubuntu 17.04:
passwd

1:4.2-3.2ubuntu1.17.04.2
login

1:4.2-3.2ubuntu1.17.04.2
uidmap

1:4.2-3.2ubuntu1.17.04.2
Ubuntu 16.10:
passwd

1:4.2-3.2ubuntu1.16.10.2
login

1:4.2-3.2ubuntu1.16.10.2
uidmap

1:4.2-3.2ubuntu1.16.10.2
Ubuntu 16.04 LTS:
passwd

1:4.2-3.1ubuntu5.3
login

1:4.2-3.1ubuntu5.3
uidmap

1:4.2-3.1ubuntu5.3
Ubuntu 14.04 LTS:
passwd

1:4.1.5.1-1ubuntu9.5
login

1:4.1.5.1-1ubuntu9.5
uidmap

1:4.1.5.1-1ubuntu9.5

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

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

References

LP: 1690820

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USN-3293-1: Linux kernel vulnerabilities

Ubuntu Security Notice USN-3293-1

16th May, 2017

linux, linux-raspi2 vulnerabilities

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

  • Ubuntu 17.04

Summary

Several security issues were fixed in the kernel.

Software description

  • linux
    – Linux kernel

  • linux-raspi2
    – Linux kernel for Raspberry Pi 2

Details

Dmitry Vyukov discovered that KVM implementation in the Linux kernel
improperly emulated the VMXON instruction. A local attacker in a guest OS
could use this to cause a denial of service (memory consumption) in the
host OS. (CVE-2017-2596)

Dmitry Vyukov discovered that the generic SCSI (sg) subsystem in the Linux
kernel contained a stack-based buffer overflow. A local attacker with
access to an sg device could use this to cause a denial of service (system
crash) or possibly execute arbitrary code. (CVE-2017-7187)

It was discovered that a NULL pointer dereference existed in the Direct
Rendering Manager (DRM) driver for VMWare devices in the Linux kernel. A
local attacker could use this to cause a denial of service (system crash).
(CVE-2017-7261)

Li Qiang discovered that an integer overflow vulnerability existed in the
Direct Rendering Manager (DRM) driver for VMWare devices in the Linux
kernel. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2017-7294)

Jason Donenfeld discovered a heap overflow in the MACsec module in the
Linux kernel. An attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2017-7477)

It was discovered that an information leak existed in the set_mempolicy and
mbind compat syscalls in the Linux kernel. A local attacker could use this
to expose sensitive information (kernel memory). (CVE-2017-7616)

Update instructions

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

Ubuntu 17.04:
linux-image-4.10.0-21-generic-lpae

4.10.0-21.23
linux-image-generic 4.10.0.21.23
linux-image-4.10.0-1005-raspi2

4.10.0-1005.7
linux-image-generic-lpae 4.10.0.21.23
linux-image-4.10.0-21-generic

4.10.0-21.23
linux-image-4.10.0-21-lowlatency

4.10.0-21.23
linux-image-lowlatency 4.10.0.21.23
linux-image-raspi2 4.10.0.1005.7

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

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

CVE-2017-2596,

CVE-2017-7187,

CVE-2017-7261,

CVE-2017-7294,

CVE-2017-7477,

CVE-2017-7616

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