Category Archives: Ubuntu

Ubuntu Security Notices

Ubuntu

USN-2441-1: Linux kernel vulnerabilities

Ubuntu Security Notice USN-2441-1

12th December, 2014

linux vulnerabilities

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

  • Ubuntu 10.04 LTS

Summary

Several security issues were fixed in the kernel.

Software description

  • linux
    – Linux kernel

Details

An information leak in the Linux kernel was discovered that could leak the
high 16 bits of the kernel stack address on 32-bit Kernel Virtual Machine
(KVM) paravirt guests. A user in the guest OS could exploit this leak to
obtain information that could potentially be used to aid in attacking the
kernel. (CVE-2014-8134)

A flaw in the handling of malformed ASCONF chunks by SCTP (Stream Control
Transmission Protocol) implementation in the Linux kernel was discovered. A
remote attacker could exploit this flaw to cause a denial of service
(system crash). (CVE-2014-3673)

A flaw in the handling of duplicate ASCONF chunks by SCTP (Stream Control
Transmission Protocol) implementation in the Linux kernel was discovered. A
remote attacker could exploit this flaw to cause a denial of service
(panic). (CVE-2014-3687)

It was discovered that excessive queuing by SCTP (Stream Control
Transmission Protocol) implementation in the Linux kernel can cause memory
pressure. A remote attacker could exploit this flaw to cause a denial of
service. (CVE-2014-3688)

A null pointer dereference flaw was discovered in the the Linux kernel’s
SCTP implementation when ASCONF is used. A remote attacker could exploit
this flaw to cause a denial of service (system crash) via a malformed INIT
chunk. (CVE-2014-7841)

Jouni Malinen reported a flaw in the handling of fragmentation in the
mac8Linux subsystem of the kernel. A remote attacker could exploit this
flaw to obtain potential sensitive cleartext information by reading
packets. (CVE-2014-8709)

A stack buffer overflow was discovered in the ioctl command handling for
the Technotrend/Hauppauge USB DEC devices driver. A local user could
exploit this flaw to cause a denial of service (system crash) or possibly
gain privileges. (CVE-2014-8884)

Andy Lutomirski discovered that the Linux kernel does not properly handle
faults associated with the Stack Segment (SS) register on the x86
architecture. A local attacker could exploit this flaw to cause a denial of
service (panic). (CVE-2014-9090)

Update instructions

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

Ubuntu 10.04 LTS:
linux-image-2.6.32-70-generic-pae

2.6.32-70.137
linux-image-2.6.32-70-preempt

2.6.32-70.137
linux-image-2.6.32-70-lpia

2.6.32-70.137
linux-image-2.6.32-70-sparc64

2.6.32-70.137
linux-image-2.6.32-70-server

2.6.32-70.137
linux-image-2.6.32-70-powerpc-smp

2.6.32-70.137
linux-image-2.6.32-70-versatile

2.6.32-70.137
linux-image-2.6.32-70-powerpc64-smp

2.6.32-70.137
linux-image-2.6.32-70-386

2.6.32-70.137
linux-image-2.6.32-70-generic

2.6.32-70.137
linux-image-2.6.32-70-powerpc

2.6.32-70.137
linux-image-2.6.32-70-sparc64-smp

2.6.32-70.137
linux-image-2.6.32-70-virtual

2.6.32-70.137
linux-image-2.6.32-70-ia64

2.6.32-70.137

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. 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

CVE-2014-3673,

CVE-2014-3687,

CVE-2014-3688,

CVE-2014-7841,

CVE-2014-8134,

CVE-2014-8709,

CVE-2014-8884,

CVE-2014-9090

Ubuntu

USN-2442-1: Linux kernel (EC2) vulnerabilities

Ubuntu Security Notice USN-2442-1

12th December, 2014

linux-ec2 vulnerabilities

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

  • Ubuntu 10.04 LTS

Summary

Several security issues were fixed in the kernel.

Software description

  • linux-ec2
    – Linux kernel for EC2

Details

An information leak in the Linux kernel was discovered that could leak the
high 16 bits of the kernel stack address on 32-bit Kernel Virtual Machine
(KVM) paravirt guests. A user in the guest OS could exploit this leak to
obtain information that could potentially be used to aid in attacking the
kernel. (CVE-2014-8134)

A flaw in the handling of malformed ASCONF chunks by SCTP (Stream Control
Transmission Protocol) implementation in the Linux kernel was discovered. A
remote attacker could exploit this flaw to cause a denial of service
(system crash). (CVE-2014-3673)

A flaw in the handling of duplicate ASCONF chunks by SCTP (Stream Control
Transmission Protocol) implementation in the Linux kernel was discovered. A
remote attacker could exploit this flaw to cause a denial of service
(panic). (CVE-2014-3687)

It was discovered that excessive queuing by SCTP (Stream Control
Transmission Protocol) implementation in the Linux kernel can cause memory
pressure. A remote attacker could exploit this flaw to cause a denial of
service. (CVE-2014-3688)

A null pointer dereference flaw was discovered in the the Linux kernel’s
SCTP implementation when ASCONF is used. A remote attacker could exploit
this flaw to cause a denial of service (system crash) via a malformed INIT
chunk. (CVE-2014-7841)

Jouni Malinen reported a flaw in the handling of fragmentation in the
mac8Linux subsystem of the kernel. A remote attacker could exploit this
flaw to obtain potential sensitive cleartext information by reading
packets. (CVE-2014-8709)

A stack buffer overflow was discovered in the ioctl command handling for
the Technotrend/Hauppauge USB DEC devices driver. A local user could
exploit this flaw to cause a denial of service (system crash) or possibly
gain privileges. (CVE-2014-8884)

Andy Lutomirski discovered that the Linux kernel does not properly handle
faults associated with the Stack Segment (SS) register on the x86
architecture. A local attacker could exploit this flaw to cause a denial of
service (panic). (CVE-2014-9090)

Update instructions

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

Ubuntu 10.04 LTS:
linux-image-2.6.32-374-ec2

2.6.32-374.91

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. 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

CVE-2014-3673,

CVE-2014-3687,

CVE-2014-3688,

CVE-2014-7841,

CVE-2014-8134,

CVE-2014-8709,

CVE-2014-8884,

CVE-2014-9090

Ubuntu

USN-2447-1: Linux kernel (Utopic HWE) vulnerabilities

Ubuntu Security Notice USN-2447-1

12th December, 2014

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

Details

An information leak in the Linux kernel was discovered that could leak the
high 16 bits of the kernel stack address on 32-bit Kernel Virtual Machine
(KVM) paravirt guests. A user in the guest OS could exploit this leak to
obtain information that could potentially be used to aid in attacking the
kernel. (CVE-2014-8134)

Rabin Vincent, Robert Swiecki, Russell King discovered that the ftrace
subsystem of the Linux kernel does not properly handle private syscall
numbers. A local user could exploit this flaw to cause a denial of service
(OOPS). (CVE-2014-7826)

A flaw in the handling of malformed ASCONF chunks by SCTP (Stream Control
Transmission Protocol) implementation in the Linux kernel was discovered. A
remote attacker could exploit this flaw to cause a denial of service
(system crash). (CVE-2014-3673)

A flaw in the handling of duplicate ASCONF chunks by SCTP (Stream Control
Transmission Protocol) implementation in the Linux kernel was discovered. A
remote attacker could exploit this flaw to cause a denial of service
(panic). (CVE-2014-3687)

It was discovered that excessive queuing by SCTP (Stream Control
Transmission Protocol) implementation in the Linux kernel can cause memory
pressure. A remote attacker could exploit this flaw to cause a denial of
service. (CVE-2014-3688)

Rabin Vincent, Robert Swiecki, Russell Kinglaw discovered a flaw in how the
perf subsystem of the Linux kernel handles private systecall numbers. A
local user could exploit this to cause a denial of service (OOPS) or bypass
ASLR protections via a crafted application. (CVE-2014-7825)

Andy Lutomirski discovered a flaw in how the Linux kernel handles
pivot_root when used with a chroot directory. A local user could exploit
this flaw to cause a denial of service (mount-tree loop). (CVE-2014-7970)

Dmitry Monakhov discovered a race condition in the ext4_file_write_iter
function of the Linux kernel’s ext4 filesystem. A local user could exploit
this flaw to cause a denial of service (file unavailability).
(CVE-2014-8086)

The KVM (kernel virtual machine) subsystem of the Linux kernel
miscalculates the number of memory pages during the handling of a mapping
failure. A guest OS user could exploit this to cause a denial of service
(host OS page unpinning) or possibly have unspecified other impact by
leveraging guest OS privileges. (CVE-2014-8369)

Andy Lutomirski discovered that the Linux kernel does not properly handle
faults associated with the Stack Segment (SS) register on the x86
architecture. A local attacker could exploit this flaw to cause a denial of
service (panic). (CVE-2014-9090)

Update instructions

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

Ubuntu 14.04 LTS:
linux-image-3.16.0-28-lowlatency

3.16.0-28.37~14.04.1
linux-image-3.16.0-28-powerpc64-emb

3.16.0-28.37~14.04.1
linux-image-3.16.0-28-generic

3.16.0-28.37~14.04.1
linux-image-3.16.0-28-powerpc-e500mc

3.16.0-28.37~14.04.1
linux-image-3.16.0-28-powerpc64-smp

3.16.0-28.37~14.04.1
linux-image-3.16.0-28-generic-lpae

3.16.0-28.37~14.04.1
linux-image-3.16.0-28-powerpc-smp

3.16.0-28.37~14.04.1

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

After a standard system update you need to 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

CVE-2014-3673,

CVE-2014-3687,

CVE-2014-3688,

CVE-2014-7825,

CVE-2014-7826,

CVE-2014-7970,

CVE-2014-8086,

CVE-2014-8134,

CVE-2014-8369,

CVE-2014-9090

Ubuntu

USN-2446-1: Linux kernel vulnerabilities

Ubuntu Security Notice USN-2446-1

12th December, 2014

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

An information leak in the Linux kernel was discovered that could leak the
high 16 bits of the kernel stack address on 32-bit Kernel Virtual Machine
(KVM) paravirt guests. A user in the guest OS could exploit this leak to
obtain information that could potentially be used to aid in attacking the
kernel. (CVE-2014-8134)

Rabin Vincent, Robert Swiecki, Russell King discovered that the ftrace
subsystem of the Linux kernel does not properly handle private syscall
numbers. A local user could exploit this flaw to cause a denial of service
(OOPS). (CVE-2014-7826)

A flaw in the handling of malformed ASCONF chunks by SCTP (Stream Control
Transmission Protocol) implementation in the Linux kernel was discovered. A
remote attacker could exploit this flaw to cause a denial of service
(system crash). (CVE-2014-3673)

A flaw in the handling of duplicate ASCONF chunks by SCTP (Stream Control
Transmission Protocol) implementation in the Linux kernel was discovered. A
remote attacker could exploit this flaw to cause a denial of service
(panic). (CVE-2014-3687)

It was discovered that excessive queuing by SCTP (Stream Control
Transmission Protocol) implementation in the Linux kernel can cause memory
pressure. A remote attacker could exploit this flaw to cause a denial of
service. (CVE-2014-3688)

Rabin Vincent, Robert Swiecki, Russell Kinglaw discovered a flaw in how the
perf subsystem of the Linux kernel handles private systecall numbers. A
local user could exploit this to cause a denial of service (OOPS) or bypass
ASLR protections via a crafted application. (CVE-2014-7825)

The KVM (kernel virtual machine) subsystem of the Linux kernel
miscalculates the number of memory pages during the handling of a mapping
failure. A guest OS user could exploit this to cause a denial of service
(host OS page unpinning) or possibly have unspecified other impact by
leveraging guest OS privileges. (CVE-2014-8369)

Andy Lutomirski discovered that the Linux kernel does not properly handle
faults associated with the Stack Segment (SS) register on the x86
architecture. A local attacker could exploit this flaw to cause a denial of
service (panic). (CVE-2014-9090)

Update instructions

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

Ubuntu 14.04 LTS:
linux-image-3.13.0-43-generic

3.13.0-43.72
linux-image-3.13.0-43-powerpc64-smp

3.13.0-43.72
linux-image-3.13.0-43-powerpc-e500

3.13.0-43.72
linux-image-3.13.0-43-lowlatency

3.13.0-43.72
linux-image-3.13.0-43-powerpc-smp

3.13.0-43.72
linux-image-3.13.0-43-powerpc-e500mc

3.13.0-43.72
linux-image-3.13.0-43-generic-lpae

3.13.0-43.72
linux-image-3.13.0-43-powerpc64-emb

3.13.0-43.72

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. 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

CVE-2014-3673,

CVE-2014-3687,

CVE-2014-3688,

CVE-2014-7825,

CVE-2014-7826,

CVE-2014-8134,

CVE-2014-8369,

CVE-2014-9090

Ubuntu

USN-2445-1: Linux kernel (Trusty HWE) vulnerabilities

Ubuntu Security Notice USN-2445-1

12th December, 2014

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

Details

An information leak in the Linux kernel was discovered that could leak the
high 16 bits of the kernel stack address on 32-bit Kernel Virtual Machine
(KVM) paravirt guests. A user in the guest OS could exploit this leak to
obtain information that could potentially be used to aid in attacking the
kernel. (CVE-2014-8134)

Rabin Vincent, Robert Swiecki, Russell King discovered that the ftrace
subsystem of the Linux kernel does not properly handle private syscall
numbers. A local user could exploit this flaw to cause a denial of service
(OOPS). (CVE-2014-7826)

A flaw in the handling of malformed ASCONF chunks by SCTP (Stream Control
Transmission Protocol) implementation in the Linux kernel was discovered. A
remote attacker could exploit this flaw to cause a denial of service
(system crash). (CVE-2014-3673)

A flaw in the handling of duplicate ASCONF chunks by SCTP (Stream Control
Transmission Protocol) implementation in the Linux kernel was discovered. A
remote attacker could exploit this flaw to cause a denial of service
(panic). (CVE-2014-3687)

It was discovered that excessive queuing by SCTP (Stream Control
Transmission Protocol) implementation in the Linux kernel can cause memory
pressure. A remote attacker could exploit this flaw to cause a denial of
service. (CVE-2014-3688)

Rabin Vincent, Robert Swiecki, Russell Kinglaw discovered a flaw in how the
perf subsystem of the Linux kernel handles private systecall numbers. A
local user could exploit this to cause a denial of service (OOPS) or bypass
ASLR protections via a crafted application. (CVE-2014-7825)

The KVM (kernel virtual machine) subsystem of the Linux kernel
miscalculates the number of memory pages during the handling of a mapping
failure. A guest OS user could exploit this to cause a denial of service
(host OS page unpinning) or possibly have unspecified other impact by
leveraging guest OS privileges. (CVE-2014-8369)

Andy Lutomirski discovered that the Linux kernel does not properly handle
faults associated with the Stack Segment (SS) register on the x86
architecture. A local attacker could exploit this flaw to cause a denial of
service (panic). (CVE-2014-9090)

Update instructions

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

Ubuntu 12.04 LTS:
linux-image-3.13.0-43-generic

3.13.0-43.72~precise1
linux-image-3.13.0-43-generic-lpae

3.13.0-43.72~precise1

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. 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

CVE-2014-3673,

CVE-2014-3687,

CVE-2014-3688,

CVE-2014-7825,

CVE-2014-7826,

CVE-2014-8134,

CVE-2014-8369,

CVE-2014-9090

Ubuntu

USN-2444-1: Linux kernel (OMAP4) vulnerabilities

Ubuntu Security Notice USN-2444-1

12th December, 2014

linux-ti-omap4 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-ti-omap4
    – Linux kernel for OMAP4

Details

An information leak in the Linux kernel was discovered that could leak the
high 16 bits of the kernel stack address on 32-bit Kernel Virtual Machine
(KVM) paravirt guests. A user in the guest OS could exploit this leak to
obtain information that could potentially be used to aid in attacking the
kernel. (CVE-2014-8134)

Rabin Vincent, Robert Swiecki, Russell King discovered that the ftrace
subsystem of the Linux kernel does not properly handle private syscall
numbers. A local user could exploit this flaw to cause a denial of service
(OOPS). (CVE-2014-7826)

Rabin Vincent, Robert Swiecki, Russell Kinglaw discovered a flaw in how the
perf subsystem of the Linux kernel handles private systecall numbers. A
local user could exploit this to cause a denial of service (OOPS) or bypass
ASLR protections via a crafted application. (CVE-2014-7825)

A null pointer dereference flaw was discovered in the the Linux kernel’s
SCTP implementation when ASCONF is used. A remote attacker could exploit
this flaw to cause a denial of service (system crash) via a malformed INIT
chunk. (CVE-2014-7841)

A stack buffer overflow was discovered in the ioctl command handling for
the Technotrend/Hauppauge USB DEC devices driver. A local user could
exploit this flaw to cause a denial of service (system crash) or possibly
gain privileges. (CVE-2014-8884)

Andy Lutomirski discovered that the Linux kernel does not properly handle
faults associated with the Stack Segment (SS) register on the x86
architecture. A local attacker could exploit this flaw to cause a denial of
service (panic). (CVE-2014-9090)

Update instructions

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

Ubuntu 12.04 LTS:
linux-image-3.2.0-1457-omap4

3.2.0-1457.77

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. 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

CVE-2014-7825,

CVE-2014-7826,

CVE-2014-7841,

CVE-2014-8134,

CVE-2014-8884,

CVE-2014-9090

Ubuntu

USN-2443-1: Linux kernel vulnerabilities

Ubuntu Security Notice USN-2443-1

12th December, 2014

linux 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
    – Linux kernel

Details

An information leak in the Linux kernel was discovered that could leak the
high 16 bits of the kernel stack address on 32-bit Kernel Virtual Machine
(KVM) paravirt guests. A user in the guest OS could exploit this leak to
obtain information that could potentially be used to aid in attacking the
kernel. (CVE-2014-8134)

Rabin Vincent, Robert Swiecki, Russell King discovered that the ftrace
subsystem of the Linux kernel does not properly handle private syscall
numbers. A local user could exploit this flaw to cause a denial of service
(OOPS). (CVE-2014-7826)

Rabin Vincent, Robert Swiecki, Russell Kinglaw discovered a flaw in how the
perf subsystem of the Linux kernel handles private systecall numbers. A
local user could exploit this to cause a denial of service (OOPS) or bypass
ASLR protections via a crafted application. (CVE-2014-7825)

A null pointer dereference flaw was discovered in the the Linux kernel’s
SCTP implementation when ASCONF is used. A remote attacker could exploit
this flaw to cause a denial of service (system crash) via a malformed INIT
chunk. (CVE-2014-7841)

A stack buffer overflow was discovered in the ioctl command handling for
the Technotrend/Hauppauge USB DEC devices driver. A local user could
exploit this flaw to cause a denial of service (system crash) or possibly
gain privileges. (CVE-2014-8884)

Andy Lutomirski discovered that the Linux kernel does not properly handle
faults associated with the Stack Segment (SS) register on the x86
architecture. A local attacker could exploit this flaw to cause a denial of
service (panic). (CVE-2014-9090)

Update instructions

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

Ubuntu 12.04 LTS:
linux-image-3.2.0-74-highbank

3.2.0-74.109
linux-image-3.2.0-74-generic-pae

3.2.0-74.109
linux-image-3.2.0-74-powerpc64-smp

3.2.0-74.109
linux-image-3.2.0-74-omap

3.2.0-74.109
linux-image-3.2.0-74-generic

3.2.0-74.109
linux-image-3.2.0-74-powerpc-smp

3.2.0-74.109
linux-image-3.2.0-74-virtual

3.2.0-74.109

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. 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

CVE-2014-7825,

CVE-2014-7826,

CVE-2014-7841,

CVE-2014-8134,

CVE-2014-8884,

CVE-2014-9090

Ubuntu

USN-2448-1: Linux kernel vulnerabilities

Ubuntu Security Notice USN-2448-1

12th December, 2014

linux vulnerabilities

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

  • Ubuntu 14.10

Summary

Several security issues were fixed in the kernel.

Software description

  • linux
    – Linux kernel

Details

An information leak in the Linux kernel was discovered that could leak the
high 16 bits of the kernel stack address on 32-bit Kernel Virtual Machine
(KVM) paravirt guests. A user in the guest OS could exploit this leak to
obtain information that could potentially be used to aid in attacking the
kernel. (CVE-2014-8134)

Rabin Vincent, Robert Swiecki, Russell King discovered that the ftrace
subsystem of the Linux kernel does not properly handle private syscall
numbers. A local user could exploit this flaw to cause a denial of service
(OOPS). (CVE-2014-7826)

A flaw in the handling of malformed ASCONF chunks by SCTP (Stream Control
Transmission Protocol) implementation in the Linux kernel was discovered. A
remote attacker could exploit this flaw to cause a denial of service
(system crash). (CVE-2014-3673)

A flaw in the handling of duplicate ASCONF chunks by SCTP (Stream Control
Transmission Protocol) implementation in the Linux kernel was discovered. A
remote attacker could exploit this flaw to cause a denial of service
(panic). (CVE-2014-3687)

It was discovered that excessive queuing by SCTP (Stream Control
Transmission Protocol) implementation in the Linux kernel can cause memory
pressure. A remote attacker could exploit this flaw to cause a denial of
service. (CVE-2014-3688)

Rabin Vincent, Robert Swiecki, Russell Kinglaw discovered a flaw in how the
perf subsystem of the Linux kernel handles private systecall numbers. A
local user could exploit this to cause a denial of service (OOPS) or bypass
ASLR protections via a crafted application. (CVE-2014-7825)

Andy Lutomirski discovered a flaw in how the Linux kernel handles
pivot_root when used with a chroot directory. A local user could exploit
this flaw to cause a denial of service (mount-tree loop). (CVE-2014-7970)

Dmitry Monakhov discovered a race condition in the ext4_file_write_iter
function of the Linux kernel’s ext4 filesystem. A local user could exploit
this flaw to cause a denial of service (file unavailability).
(CVE-2014-8086)

The KVM (kernel virtual machine) subsystem of the Linux kernel
miscalculates the number of memory pages during the handling of a mapping
failure. A guest OS user could exploit this to cause a denial of service
(host OS page unpinning) or possibly have unspecified other impact by
leveraging guest OS privileges. (CVE-2014-8369)

Andy Lutomirski discovered that the Linux kernel does not properly handle
faults associated with the Stack Segment (SS) register on the x86
architecture. A local attacker could exploit this flaw to cause a denial of
service (panic). (CVE-2014-9090)

Update instructions

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

Ubuntu 14.10:
linux-image-3.16.0-28-lowlatency

3.16.0-28.37
linux-image-3.16.0-28-powerpc64-emb

3.16.0-28.37
linux-image-3.16.0-28-generic

3.16.0-28.37
linux-image-3.16.0-28-powerpc-e500mc

3.16.0-28.37
linux-image-3.16.0-28-powerpc64-smp

3.16.0-28.37
linux-image-3.16.0-28-generic-lpae

3.16.0-28.37
linux-image-3.16.0-28-powerpc-smp

3.16.0-28.37

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. 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

CVE-2014-3673,

CVE-2014-3687,

CVE-2014-3688,

CVE-2014-7825,

CVE-2014-7826,

CVE-2014-7970,

CVE-2014-8086,

CVE-2014-8134,

CVE-2014-8369,

CVE-2014-9090

Ubuntu

USN-2440-1: Mutt vulnerability

Ubuntu Security Notice USN-2440-1

11th December, 2014

mutt vulnerability

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

  • Ubuntu 14.10
  • Ubuntu 14.04 LTS
  • Ubuntu 12.04 LTS
  • Ubuntu 10.04 LTS

Summary

The mutt mail client could be made to crash if it opened a specially
crafted email.

Software description

  • mutt
    – text-based mailreader supporting MIME, GPG, PGP and threading

Details

Jakub Wilk discovered that the write_one_header function in mutt
did not properly handle newline characters at the beginning of a
header. An attacker could specially craft an email to cause mutt to
crash, resulting in a denial of service.

Update instructions

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

Ubuntu 14.10:
mutt-patched

1.5.23-1.1ubuntu0.2
mutt

1.5.23-1.1ubuntu0.2
Ubuntu 14.04 LTS:
mutt-patched

1.5.21-6.4ubuntu2.1
mutt

1.5.21-6.4ubuntu2.1
Ubuntu 12.04 LTS:
mutt-patched

1.5.21-5ubuntu2.2
mutt

1.5.21-5ubuntu2.2
Ubuntu 10.04 LTS:
mutt-patched

1.5.20-7ubuntu1.3
mutt

1.5.20-7ubuntu1.3

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

After a standard system update you need to restart any running
instances of mutt to make all the necessary changes.

References

CVE-2014-9116

Ubuntu

USN-2439-1: QEMU vulnerabilities

Ubuntu Security Notice USN-2439-1

11th December, 2014

qemu, qemu-kvm vulnerabilities

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

  • Ubuntu 14.10
  • Ubuntu 14.04 LTS
  • Ubuntu 12.04 LTS
  • Ubuntu 10.04 LTS

Summary

Several security issues were fixed in QEMU.

Software description

  • qemu
    – Machine emulator and virtualizer

  • qemu-kvm
    – Machine emulator and virtualizer

Details

Michael S. Tsirkin discovered that QEMU incorrectly handled certain
parameters during ram load while performing a migration. An attacker able
to manipulate savevm data could use this issue to possibly execute
arbitrary code on the host. This issue only affected Ubuntu 12.04 LTS,
Ubuntu 14.04 LTS, and Ubuntu 14.10. (CVE-2014-7840)

Paolo Bonzini discovered that QEMU incorrectly handled memory in the Cirrus
VGA device. A malicious guest could possibly use this issue to write into
memory of the host, leading to privilege escalation. (CVE-2014-8106)

Update instructions

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

Ubuntu 14.10:
qemu-system-misc

2.1+dfsg-4ubuntu6.3
qemu-system

2.1+dfsg-4ubuntu6.3
qemu-system-aarch64

2.1+dfsg-4ubuntu6.3
qemu-system-x86

2.1+dfsg-4ubuntu6.3
qemu-system-sparc

2.1+dfsg-4ubuntu6.3
qemu-system-arm

2.1+dfsg-4ubuntu6.3
qemu-system-ppc

2.1+dfsg-4ubuntu6.3
qemu-system-mips

2.1+dfsg-4ubuntu6.3
Ubuntu 14.04 LTS:
qemu-system-misc

2.0.0+dfsg-2ubuntu1.9
qemu-system

2.0.0+dfsg-2ubuntu1.9
qemu-system-aarch64

2.0.0+dfsg-2ubuntu1.9
qemu-system-x86

2.0.0+dfsg-2ubuntu1.9
qemu-system-sparc

2.0.0+dfsg-2ubuntu1.9
qemu-system-arm

2.0.0+dfsg-2ubuntu1.9
qemu-system-ppc

2.0.0+dfsg-2ubuntu1.9
qemu-system-mips

2.0.0+dfsg-2ubuntu1.9
Ubuntu 12.04 LTS:
qemu-kvm

1.0+noroms-0ubuntu14.21
Ubuntu 10.04 LTS:
qemu-kvm

0.12.3+noroms-0ubuntu9.26

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.

References

CVE-2014-7840,

CVE-2014-8106