ubuntu-security-announce Digest, Vol 93, Issue 1

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Today's Topics:

1. [USN-1457-1] Linux kernel vulnerabilities (John Johansen)
2. [USN-1456-1] Nut vulnerability (Jamie Strandboge)
3. [USN-1458-1] Linux kernel (OMAP4) vulnerabilities (John Johansen)
4. [USN-1459-1] Linux kernel (OMAP4) vulnerabilities (John Johansen)
5. [USN-1460-1] Linux kernel (OMAP4) vulnerabilities (John Johansen)


----------------------------------------------------------------------

Message: 1
Date: Thu, 31 May 2012 14:40:41 -0700
From: John Johansen <john.johansen@canonical.com>
To: ubuntu-security-announce@lists.ubuntu.com
Subject: [USN-1457-1] Linux kernel vulnerabilities
Message-ID: <4FC7E559.5020003@canonical.com>
Content-Type: text/plain; charset="iso-8859-1"

==========================================================================
Ubuntu Security Notice USN-1457-1
May 31, 2012

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

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

- Ubuntu 11.04

Summary:

Several security issues were fixed in the kernel.

Software Description:
- linux: Linux kernel

Details:

Andy Adamson discovered a flaw in the Linux kernel's NFSv4 implementation.
A remote NFS server (attacker) could exploit this flaw to cause a denial of
service. (CVE-2011-4131)

A flaw was found in the Linux kernel's KVM (Kernel Virtual Machine) virtual
cpu setup. An unprivileged local user could exploit this flaw to crash the
system leading to a denial of service. (CVE-2012-1601)

A flaw was discovered in the Linux kernel's KVM (kernel virtual machine).
An administrative user in the guest OS could leverage this flaw to cause a
denial of service in the host OS. (CVE-2012-2121)

Steve Grubb reported a flaw with Linux fscaps (file system base
capabilities) when used to increase the permissions of a process. For
application on which fscaps are in use a local attacker can disable address
space randomization to make attacking the process with raised privileges
easier. (CVE-2012-2123)

Schacher Raindel discovered a flaw in the Linux kernel's memory handling
when hugetlb is enabled. An unprivileged local attacker could exploit this
flaw to cause a denial of service and potentially gain higher privileges.
(CVE-2012-2133)

Update instructions:

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

Ubuntu 11.04:
linux-image-2.6.38-15-generic 2.6.38-15.60
linux-image-2.6.38-15-generic-pae 2.6.38-15.60
linux-image-2.6.38-15-omap 2.6.38-15.60
linux-image-2.6.38-15-powerpc 2.6.38-15.60
linux-image-2.6.38-15-powerpc-smp 2.6.38-15.60
linux-image-2.6.38-15-powerpc64-smp 2.6.38-15.60
linux-image-2.6.38-15-server 2.6.38-15.60
linux-image-2.6.38-15-versatile 2.6.38-15.60
linux-image-2.6.38-15-virtual 2.6.38-15.60

After a standard system update you need to reboot your computer to make
all the necessary changes.

References:
http://www.ubuntu.com/usn/usn-1457-1
CVE-2011-4131, CVE-2012-1601, CVE-2012-2121, CVE-2012-2123,
CVE-2012-2133

Package Information:
https://launchpad.net/ubuntu/+source/linux/2.6.38-15.60

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Message: 2
Date: Thu, 31 May 2012 16:46:52 -0500
From: Jamie Strandboge <jamie@canonical.com>
To: ubuntu-security-announce@lists.ubuntu.com
Subject: [USN-1456-1] Nut vulnerability
Message-ID: <1338500812.5150.124.camel@localhost>
Content-Type: text/plain; charset="utf-8"

==========================================================================
Ubuntu Security Notice USN-1456-1
May 31, 2012

nut vulnerability
==========================================================================

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

- Ubuntu 12.04 LTS
- Ubuntu 11.10
- Ubuntu 11.04
- Ubuntu 10.04 LTS

Summary:

Nut could be made to crash if it received specially crafted network
traffic.

Software Description:
- nut: Network UPS tools

Details:

Sebastian Pohle discovered that Nut did not properly validate its input
when receiving data over the network. If upsd was configured to allow
connections over the network, a remote attacker could exploit this to
cause a denial of service (application crash).

Update instructions:

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

Ubuntu 12.04 LTS:
nut-server 2.6.3-1ubuntu1.1

Ubuntu 11.10:
nut-server 2.6.1-2ubuntu2.1

Ubuntu 11.04:
nut 2.6.0-1ubuntu3.1

Ubuntu 10.04 LTS:
nut 2.4.3-1ubuntu3.2

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

References:
http://www.ubuntu.com/usn/usn-1456-1
CVE-2012-2944

Package Information:
https://launchpad.net/ubuntu/+source/nut/2.6.3-1ubuntu1.1
https://launchpad.net/ubuntu/+source/nut/2.6.1-2ubuntu2.1
https://launchpad.net/ubuntu/+source/nut/2.6.0-1ubuntu3.1
https://launchpad.net/ubuntu/+source/nut/2.4.3-1ubuntu3.2


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Message: 3
Date: Thu, 31 May 2012 14:49:31 -0700
From: John Johansen <john.johansen@canonical.com>
To: ubuntu-security-announce@lists.ubuntu.com
Subject: [USN-1458-1] Linux kernel (OMAP4) vulnerabilities
Message-ID: <4FC7E76B.90801@canonical.com>
Content-Type: text/plain; charset="iso-8859-1"

==========================================================================
Ubuntu Security Notice USN-1458-1
May 31, 2012

linux-ti-omap4 vulnerabilities
==========================================================================

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

- Ubuntu 11.04

Summary:

Several security issues were fixed in the kernel.

Software Description:
- linux-ti-omap4: Linux kernel for OMAP4

Details:

A flaw was found in the Linux's kernels ext4 file system when mounted with
a journal. A local, unprivileged user could exploit this flaw to cause a
denial of service. (CVE-2011-4086)

A flaw was discovered in the Linux kernel's cifs file system. An
unprivileged local user could exploit this flaw to crash the system leading
to a denial of service. (CVE-2012-1090)

H. Peter Anvin reported a flaw in the Linux kernel that could crash the
system. A local user could exploit this flaw to crash the system.
(CVE-2012-1097)

A flaw was discovered in the Linux kernel's cgroups subset. A local
attacker could use this flaw to crash the system. (CVE-2012-1146)

A flaw was found in the Linux kernel's ext4 file system when mounting a
corrupt filesystem. A user-assisted remote attacker could exploit this flaw
to cause a denial of service. (CVE-2012-2100)

Update instructions:

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

Ubuntu 11.04:
linux-image-2.6.38-1209-omap4 2.6.38-1209.24

After a standard system update you need to reboot your computer to make
all the necessary changes.

References:
http://www.ubuntu.com/usn/usn-1458-1
CVE-2011-4086, CVE-2012-1090, CVE-2012-1097, CVE-2012-1146,
CVE-2012-2100

Package Information:
https://launchpad.net/ubuntu/+source/linux-ti-omap4/2.6.38-1209.24

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Message: 4
Date: Thu, 31 May 2012 14:56:07 -0700
From: John Johansen <john.johansen@canonical.com>
To: ubuntu-security-announce@lists.ubuntu.com
Subject: [USN-1459-1] Linux kernel (OMAP4) vulnerabilities
Message-ID: <4FC7E8F7.6040306@canonical.com>
Content-Type: text/plain; charset="iso-8859-1"

==========================================================================
Ubuntu Security Notice USN-1459-1
May 31, 2012

linux-ti-omap4 vulnerabilities
==========================================================================

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

- Ubuntu 11.10

Summary:

Several security issues were fixed in the kernel.

Software Description:
- linux-ti-omap4: Linux kernel for OMAP4

Details:

A flaw was found in the Linux kernel's KVM (Kernel Virtual Machine) virtual
cpu setup. An unprivileged local user could exploit this flaw to crash the
system leading to a denial of service. (CVE-2012-1601)

Steve Grubb reported a flaw with Linux fscaps (file system base
capabilities) when used to increase the permissions of a process. For
application on which fscaps are in use a local attacker can disable address
space randomization to make attacking the process with raised privileges
easier. (CVE-2012-2123)

Update instructions:

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

Ubuntu 11.10:
linux-image-3.0.0-1210-omap4 3.0.0-1210.22

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:
http://www.ubuntu.com/usn/usn-1459-1
CVE-2012-1601, CVE-2012-2123

Package Information:
https://launchpad.net/ubuntu/+source/linux-ti-omap4/3.0.0-1210.22

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Message: 5
Date: Thu, 31 May 2012 15:01:48 -0700
From: John Johansen <john.johansen@canonical.com>
To: ubuntu-security-announce@lists.ubuntu.com
Subject: [USN-1460-1] Linux kernel (OMAP4) vulnerabilities
Message-ID: <4FC7EA4C.60307@canonical.com>
Content-Type: text/plain; charset="iso-8859-1"

==========================================================================
Ubuntu Security Notice USN-1460-1
May 31, 2012

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:

A flaw was found in the Linux kernel's KVM (Kernel Virtual Machine) virtual
cpu setup. An unprivileged local user could exploit this flaw to crash the
system leading to a denial of service. (CVE-2012-1601)

Steve Grubb reported a flaw with Linux fscaps (file system base
capabilities) when used to increase the permissions of a process. For
application on which fscaps are in use a local attacker can disable address
space randomization to make attacking the process with raised privileges
easier. (CVE-2012-2123)

Update instructions:

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

Ubuntu 12.04 LTS:
linux-image-3.2.0-1413-omap4 3.2.0-1413.17

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:
http://www.ubuntu.com/usn/usn-1460-1
CVE-2012-1601, CVE-2012-2123

Package Information:
https://launchpad.net/ubuntu/+source/linux-ti-omap4/3.2.0-1413.17

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