Category Archives: Ubuntu

Ubuntu

USN-3530-1: WebKitGTK+ vulnerabilities

Ubuntu Security Notice USN-3530-1

11th January, 2018

webkit2gtk vulnerabilities

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

  • Ubuntu 17.10
  • Ubuntu 17.04
  • Ubuntu 16.04 LTS

Summary

WebKitGTK+ could be made to expose sensitive information.

Software description

  • webkit2gtk
    – Web content engine library for GTK+

Details

It was discovered that speculative execution performed by modern CPUs
could leak information through a timing side-channel attack, and that
this could be exploited in web browser JavaScript engines. If a user were
tricked in to opening a specially crafted website, an attacker could
potentially exploit this to obtain sensitive information from other
domains, bypassing same-origin restrictions. (CVE-2017-5753, CVE-2017-5715)

Update instructions

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

Ubuntu 17.10:
libwebkit2gtk-4.0-37

2.18.5-0ubuntu0.17.10.1
libjavascriptcoregtk-4.0-18

2.18.5-0ubuntu0.17.10.1
Ubuntu 17.04:
libwebkit2gtk-4.0-37

2.18.5-0ubuntu0.17.04.1
libjavascriptcoregtk-4.0-18

2.18.5-0ubuntu0.17.04.1
Ubuntu 16.04 LTS:
libwebkit2gtk-4.0-37

2.18.5-0ubuntu0.16.04.1
libjavascriptcoregtk-4.0-18

2.18.5-0ubuntu0.16.04.1

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

This update uses a new upstream release, which includes additional bug
fixes. After a standard system update you need to restart any applications
that use WebKitGTK+, such as Epiphany, to make all the necessary changes.

References

CVE-2017-5715,

CVE-2017-5753

Read More

USN-3522-2: Linux (Xenial HWE) vulnerability

Ubuntu Security Notice USN-3522-2

9th January, 2018

linux-lts-xenial, linux-aws vulnerability

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

  • Ubuntu 14.04 LTS

Summary

Several security issues were fixed in the Linux kernel.

Software description

  • linux-aws
    – Linux kernel for Amazon Web Services (AWS) systems

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

Details

USN-3522-1 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.

Jann Horn discovered that microprocessors utilizing speculative execution
and indirect branch prediction may allow unauthorized memory reads via
sidechannel attacks. This flaw is known as Meltdown. A local attacker could
use this to expose sensitive information, including kernel memory.
(CVE-2017-5754)

Update instructions

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

Ubuntu 14.04 LTS:
linux-image-4.4.0-108-lowlatency

4.4.0-108.131~14.04.1
linux-image-4.4.0-1009-aws

4.4.0-1009.9
linux-image-4.4.0-108-generic

4.4.0-108.131~14.04.1
linux-image-lowlatency-lts-xenial 4.4.0.108.91
linux-image-generic-lts-xenial 4.4.0.108.91
linux-image-aws 4.4.0.1009.9

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-2017-5754

Read More

USN-3525-1: Linux kernel vulnerability

Ubuntu Security Notice USN-3525-1

10th January, 2018

linux vulnerability

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

  • Ubuntu 12.04 LTS

Summary

The system could be made to expose sensitive information.

Software description

  • linux
    – Linux kernel

Details

Jann Horn discovered that microprocessors utilizing speculative execution
and indirect branch prediction may allow unauthorized memory reads via
sidechannel attacks. This flaw is known as Meltdown. A local attacker could
use this to expose sensitive information, including kernel memory.

Update instructions

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

Ubuntu 12.04 LTS:
linux-image-3.2.0-132-generic-pae

3.2.0-132.178
linux-image-3.2.0-132-generic

3.2.0-132.178
linux-image-generic-pae

3.2.0.132.146
linux-image-generic

3.2.0.132.146

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-2017-5754

Read More

USN-3524-2: Linux kernel (Trusty HWE) vulnerability

Ubuntu Security Notice USN-3524-2

9th January, 2018

linux-lts-trusty vulnerability

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

  • Ubuntu 12.04 LTS

Summary

The system could be made to expose sensitive information.

Software description

  • linux-lts-trusty
    – Linux hardware enablement kernel from Trusty for Precise ESM

Details

USN-3524-1 fixed vulnerabilities in the Linux kernel for Ubuntu 14.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 14.04 LTS for Ubuntu
12.04 ESM.

Jann Horn discovered that microprocessors utilizing speculative execution
and indirect branch prediction may allow unauthorized memory reads via
sidechannel attacks. This flaw is known as Meltdown. A local attacker could
use this to expose sensitive information, including kernel memory.

Update instructions

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

Ubuntu 12.04 LTS:
linux-image-3.13.0-139-generic-lpae

3.13.0-139.188~precise1
linux-image-generic-lpae-lts-trusty

3.13.0.139.129
linux-image-3.13.0-139-generic

3.13.0-139.188~precise1
linux-image-generic-lts-trusty

3.13.0.139.129

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-2017-5754

Read More

USN-3524-1: Linux kernel vulnerability

Ubuntu Security Notice USN-3524-1

9th January, 2018

linux vulnerability

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

  • Ubuntu 14.04 LTS

Summary

Several security issues were fixed in the Linux kernel.

Software description

  • linux
    – Linux kernel

Details

Jann Horn discovered that microprocessors utilizing speculative execution
and indirect branch prediction may allow unauthorized memory reads via
sidechannel attacks. This flaw is known as Meltdown. A local attacker could
use this to expose sensitive information, including kernel memory.

Update instructions

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

Ubuntu 14.04 LTS:
linux-image-generic

3.13.0.139.148
linux-image-3.13.0-139-lowlatency

3.13.0-139.188
linux-image-lowlatency

3.13.0.139.148
linux-image-3.13.0-139-generic

3.13.0-139.188

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-2017-5754

Read More

USN-3522-1: Linux kernel vulnerability

Ubuntu Security Notice USN-3522-1

9th January, 2018

linux, linux-aws, linux-euclid, linux-kvm vulnerability

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

  • Ubuntu 16.04 LTS

Summary

Several security issues were fixed in the Linux kernel.

Software description

  • linux
    – Linux kernel

  • linux-aws
    – Linux kernel for Amazon Web Services (AWS) systems

  • linux-euclid
    – Linux kernel for Intel Euclid systems

  • linux-kvm
    – Linux kernel for cloud environments

Details

Jann Horn discovered that microprocessors utilizing speculative execution
and indirect branch prediction may allow unauthorized memory reads via
sidechannel attacks. This flaw is known as Meltdown. A local attacker could
use this to expose sensitive information, including kernel memory.

Update instructions

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

Ubuntu 16.04 LTS:
linux-image-4.4.0-108-lowlatency

4.4.0-108.131
linux-image-euclid 4.4.0.9021.21
linux-image-4.4.0-108-generic

4.4.0-108.131
linux-image-4.4.0-9021-euclid

4.4.0-9021.22
linux-image-generic 4.4.0.108.113
linux-image-aws 4.4.0.1047.49
linux-image-kvm 4.4.0.1015.15
linux-image-4.4.0-1047-aws

4.4.0-1047.56
linux-image-lowlatency 4.4.0.108.113
linux-image-4.4.0-1015-kvm

4.4.0-1015.20

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-2017-5754

Read More

USN-3523-1: Linux kernel vulnerabilities

Ubuntu Security Notice USN-3523-1

9th January, 2018

linux vulnerabilities

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

  • Ubuntu 17.10

Summary

Several security issues were fixed in the Linux kernel.

Software description

  • linux
    – Linux kernel

Details

Jann Horn discovered that microprocessors utilizing speculative execution
and indirect branch prediction may allow unauthorized memory reads via
sidechannel attacks. This flaw is known as Meltdown. A local attacker could
use this to expose sensitive information, including kernel memory.
(CVE-2017-5754)

Jann Horn discovered that the Berkeley Packet Filter (BPF) implementation
in the Linux kernel did not properly check the relationship between pointer
values and the BPF stack. A local attacker could use this to cause a denial
of service (system crash) or possibly execute arbitrary code.
(CVE-2017-17863)

Jann Horn discovered that the Berkeley Packet Filter (BPF) implementation
in the Linux kernel improperly performed sign extension in some situations.
A local attacker could use this to cause a denial of service (system crash)
or possibly execute arbitrary code. (CVE-2017-16995)

Alexei Starovoitov discovered that the Berkeley Packet Filter (BPF)
implementation in the Linux kernel contained a branch-pruning logic issue
around unreachable code. A local attacker could use this to cause a denial
of service. (CVE-2017-17862)

Jann Horn discovered that the Berkeley Packet Filter (BPF) implementation
in the Linux kernel mishandled pointer data values in some situations. A
local attacker could use this to to expose sensitive information (kernel
memory). (CVE-2017-17864)

Update instructions

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

Ubuntu 17.10:
linux-image-4.13.0-25-lowlatency

4.13.0-25.29
linux-image-generic

4.13.0.25.26
linux-image-4.13.0-25-generic

4.13.0-25.29
linux-image-lowlatency

4.13.0.25.26

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-2017-16995,

CVE-2017-17862,

CVE-2017-17863,

CVE-2017-17864,

CVE-2017-5754

Read More

USN-3526-1: SSSD vulnerability

Ubuntu Security Notice USN-3526-1

10th January, 2018

sssd vulnerability

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

  • Ubuntu 17.04
  • Ubuntu 16.04 LTS

Summary

SSSD could be made to expose sensitive information.

Software description

  • sssd
    – System Security Services Daemon — metapackage

Details

It was discovered that SSSD incorrectly handled certain inputs when querying
its local cache. An attacker could use this to inject arbitrary code and expose
sensitive information.

Update instructions

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

Ubuntu 17.04:
sssd

1.15.2-1ubuntu1.1
sssd-common

1.15.2-1ubuntu1.1
sssd-tools

1.15.2-1ubuntu1.1
Ubuntu 16.04 LTS:
sssd

1.13.4-1ubuntu1.10
sssd-common

1.13.4-1ubuntu1.10
sssd-tools

1.13.4-1ubuntu1.10

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

CVE-2017-12173

Read More

USN-3522-3: Linux kernel regression

Ubuntu Security Notice USN-3522-3

10th January, 2018

linux regression

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

  • Ubuntu 16.04 LTS

Summary

USN-3522-1 introduced a regression in the Linux kernel.

Software description

  • linux
    – Linux kernel

Details

USN-3522-1 fixed a vulnerability in the Linux kernel to address
Meltdown (CVE-2017-5754). Unfortunately, that update introduced
a regression where a few systems failed to boot successfully. This
update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

Jann Horn discovered that microprocessors utilizing speculative execution
and indirect branch prediction may allow unauthorized memory reads via
sidechannel attacks. This flaw is known as Meltdown. A local attacker could
use this to expose sensitive information, including kernel memory.

Update instructions

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

Ubuntu 16.04 LTS:
linux-image-generic

4.4.0.109.114
linux-image-4.4.0-109-lowlatency

4.4.0-109.132
linux-image-lowlatency

4.4.0.109.114
linux-image-4.4.0-109-generic

4.4.0-109.132

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

LP: 1741934

Read More

USN-3528-1: Ruby vulnerabilities

Ubuntu Security Notice USN-3528-1

10th January, 2018

ruby1.9.1, ruby2.3 vulnerabilities

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

  • Ubuntu 17.10
  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS

Summary

Several security issues were fixed in Ruby.

Software description

  • ruby1.9.1
    – Interpreter of object-oriented scripting language Ruby

  • ruby2.3
    – Interpreter of object-oriented scripting language Ruby

Details

It was discovered that Ruby incorrectly handled certain terminal emulator
escape sequences. An attacker could use this to execute arbitrary code via
a crafted user name. This issue only affected Ubuntu 16.04 LTS and Ubuntu 17.10.
(CVE-2017-10784)

It was discovered that Ruby incorrectly handled certain strings.
An attacker could use this to cause a denial of service. This issue
only affected Ubuntu 16.04 LTS and Ubuntu 17.10. (CVE-2017-14033)

It was discovered that Ruby incorrectly handled some generating JSON.
An attacker could use this to possible expose sensitive information.
This issue only affected Ubuntu 16.04 LTS and Ubuntu 17.10.
(CVE-2017-14064)

It was discovered that Ruby incorrectly handled certain inputs.
An attacker could use this to execute arbitrary code.
(CVE-2017-17790)

Update instructions

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

Ubuntu 17.10:
libruby2.3

2.3.3-1ubuntu1.2
ruby2.3

2.3.3-1ubuntu1.2
Ubuntu 16.04 LTS:
libruby2.3

2.3.1-2~16.04.5
ruby2.3

2.3.1-2~16.04.5
Ubuntu 14.04 LTS:
ruby1.9.1

1.9.3.484-2ubuntu1.7
ruby1.9.3

1.9.3.484-2ubuntu1.7
libruby1.9.1

1.9.3.484-2ubuntu1.7

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

CVE-2017-10784,

CVE-2017-14033,

CVE-2017-14064,

CVE-2017-17790

Read More