Ubuntu Security Notice USN-2716-1

17th August, 2015

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

Marcelo Ricardo Leitner discovered a race condition in the Linux kernel’s
SCTP address configuration lists when using Address Configuration Change
(ASCONF) options on a socket. An unprivileged local user could exploit this
flaw 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-3.13.0-62-powerpc64-smp

3.13.0-62.102

linux-image-3.13.0-62-lowlatency

3.13.0-62.102

linux-image-3.13.0-62-powerpc64-emb

3.13.0-62.102

linux-image-3.13.0-62-powerpc-smp

3.13.0-62.102

linux-image-3.13.0-62-powerpc-e500mc

3.13.0-62.102

linux-image-3.13.0-62-generic-lpae

3.13.0-62.102

linux-image-3.13.0-62-powerpc-e500

3.13.0-62.102

linux-image-3.13.0-62-generic

3.13.0-62.102

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-2015-3212

Ubuntu Security Notice USN-2717-1

17th August, 2015

linux-lts-utopic 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-lts-utopic
  – Linux hardware enablement kernel from Utopic

Details

Marcelo Ricardo Leitner discovered a race condition in the Linux kernel’s
SCTP address configuration lists when using Address Configuration Change
(ASCONF) options on a socket. An unprivileged local user could exploit this
flaw 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-3.16.0-46-powerpc64-smp

3.16.0-46.62~14.04.1

linux-image-3.16.0-46-lowlatency

3.16.0-46.62~14.04.1

linux-image-3.16.0-46-generic

3.16.0-46.62~14.04.1

linux-image-3.16.0-46-generic-lpae

3.16.0-46.62~14.04.1

linux-image-3.16.0-46-powerpc-e500mc

3.16.0-46.62~14.04.1

linux-image-3.16.0-46-powerpc64-emb

3.16.0-46.62~14.04.1

linux-image-3.16.0-46-powerpc-smp

3.16.0-46.62~14.04.1

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-2015-3212

Ubuntu Security Notice USN-2718-1

17th August, 2015

linux-lts-vivid 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-lts-vivid
  – Linux hardware enablement kernel from Vivid

Details

Marcelo Ricardo Leitner discovered a race condition in the Linux kernel’s
SCTP address configuration lists when using Address Configuration Change
(ASCONF) options on a socket. An unprivileged local user could exploit this
flaw 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-3.19.0-26-generic-lpae

3.19.0-26.28~14.04.1

linux-image-3.19.0-26-lowlatency

3.19.0-26.28~14.04.1

linux-image-3.19.0-26-generic

3.19.0-26.28~14.04.1

linux-image-3.19.0-26-powerpc64-emb

3.19.0-26.28~14.04.1

linux-image-3.19.0-26-powerpc-smp

3.19.0-26.28~14.04.1

linux-image-3.19.0-26-powerpc64-smp

3.19.0-26.28~14.04.1

linux-image-3.19.0-26-powerpc-e500mc

3.19.0-26.28~14.04.1

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-2015-3212

Ubuntu Security Notice USN-2719-1

17th August, 2015

linux vulnerability

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

• Ubuntu 15.04

Summary

The system could be made to crash under certain conditions.

Software description

• linux
  – Linux kernel

Details

Marcelo Ricardo Leitner discovered a race condition in the Linux kernel’s
SCTP address configuration lists when using Address Configuration Change
(ASCONF) options on a socket. An unprivileged local user could exploit this
flaw 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 15.04:

linux-image-3.19.0-26-generic-lpae

3.19.0-26.28

linux-image-3.19.0-26-lowlatency

3.19.0-26.28

linux-image-3.19.0-26-generic

3.19.0-26.28

linux-image-3.19.0-26-powerpc64-emb

3.19.0-26.28

linux-image-3.19.0-26-powerpc-smp

3.19.0-26.28

linux-image-3.19.0-26-powerpc64-smp

3.19.0-26.28

linux-image-3.19.0-26-powerpc-e500mc

3.19.0-26.28

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-2015-3212

Ubuntu Security Notice USN-2710-2

18th August, 2015

openssh regression

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

• Ubuntu 15.04
• Ubuntu 14.04 LTS
• Ubuntu 12.04 LTS

Summary

USN-2710-1 introduced a regression in OpenSSH.

Software description

• openssh
  – secure shell (SSH) for secure access to remote machines

Details

USN-2710-1 fixed vulnerabilities in OpenSSH. The upstream fix for
CVE-2015-5600 caused a regression resulting in random authentication
failures in non-default configurations. This update fixes the problem.

Original advisory details:

Moritz Jodeit discovered that OpenSSH incorrectly handled usernames when
using PAM authentication. If an additional vulnerability were discovered in
the OpenSSH unprivileged child process, this issue could allow a remote
attacker to perform user impersonation. (CVE number pending)

Moritz Jodeit discovered that OpenSSH incorrectly handled context memory
when using PAM authentication. If an additional vulnerability were
discovered in the OpenSSH unprivileged child process, this issue could
allow a remote attacker to bypass authentication or possibly execute
arbitrary code. (CVE number pending)

Jann Horn discovered that OpenSSH incorrectly handled time windows for
X connections. A remote attacker could use this issue to bypass certain
access restrictions. (CVE-2015-5352)

It was discovered that OpenSSH incorrectly handled keyboard-interactive
authentication. In a non-default configuration, a remote attacker could
possibly use this issue to perform a brute-force password attack.
(CVE-2015-5600)

Update instructions

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

Ubuntu 15.04:

openssh-server

1:6.7p1-5ubuntu1.3

Ubuntu 14.04 LTS:

openssh-server

1:6.6p1-2ubuntu2.3

Ubuntu 12.04 LTS:

openssh-server

1:5.9p1-5ubuntu1.7

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

LP: 1485719