ubuntu-security-announce Digest, Vol 92, Issue 6

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Today's Topics:

1. [USN-1439-1] Horizon vulnerabilities (Jamie Strandboge)
2. [USN-1432-1] Linux kernel vulnerabilities (John Johansen)
3. [USN-1440-1] Linux kernel (Natty backport) vulnerabilities
(John Johansen)


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

Message: 1
Date: Mon, 07 May 2012 07:14:10 -0700
From: Jamie Strandboge <jamie@canonical.com>
To: ubuntu-security-announce@lists.ubuntu.com
Subject: [USN-1439-1] Horizon vulnerabilities
Message-ID: <1336400050.3481.6.camel@localhost>
Content-Type: text/plain; charset="utf-8"

==========================================================================
Ubuntu Security Notice USN-1439-1
May 07, 2012

horizon vulnerabilities
==========================================================================

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

- Ubuntu 12.04 LTS

Summary:

Horizon could be made to expose sensitive information over the network.

Software Description:
- horizon: Web interface for OpenStack cloud infrastructure

Details:

Matthias Weckbecker discovered a cross-site scripting (XSS) vulnerability
in Horizon via the log viewer refrash mechanism. If a user were tricked
into viewing a specially crafted log message, a remote attacker could
exploit this to modify the contents or steal confidential data within the
same domain. (CVE-2012-2094)

Thomas Biege discovered a session fixation vulnerability in Horizon. An
attacker could exploit this to potentially allow access to unauthorized
information and capabilities. (CVE-2012-2144)

Update instructions:

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

Ubuntu 12.04 LTS:
python-django-horizon 2012.1-0ubuntu8.1

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

References:
http://www.ubuntu.com/usn/usn-1439-1
CVE-2012-2094, CVE-2012-2144

Package Information:
https://launchpad.net/ubuntu/+source/horizon/2012.1-0ubuntu8.1


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Message: 2
Date: Mon, 07 May 2012 23:40:23 -0700
From: John Johansen <john.johansen@canonical.com>
To: ubuntu-security-announce@lists.ubuntu.com
Subject: [USN-1432-1] Linux kernel vulnerabilities
Message-ID: <4FA8BFD7.4090203@canonical.com>
Content-Type: text/plain; charset="iso-8859-1"

==========================================================================
Ubuntu Security Notice USN-1432-1
May 08, 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:

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)

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-2.6.38-15-generic 2.6.38-15.59
linux-image-2.6.38-15-generic-pae 2.6.38-15.59
linux-image-2.6.38-15-omap 2.6.38-15.59
linux-image-2.6.38-15-powerpc 2.6.38-15.59
linux-image-2.6.38-15-powerpc-smp 2.6.38-15.59
linux-image-2.6.38-15-powerpc64-smp 2.6.38-15.59
linux-image-2.6.38-15-server 2.6.38-15.59
linux-image-2.6.38-15-versatile 2.6.38-15.59
linux-image-2.6.38-15-virtual 2.6.38-15.59

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-1432-1
CVE-2011-4086, CVE-2012-1090, CVE-2012-2100

Package Information:
https://launchpad.net/ubuntu/+source/linux/2.6.38-15.59

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Message: 3
Date: Tue, 08 May 2012 00:56:29 -0700
From: John Johansen <john.johansen@canonical.com>
To: ubuntu-security-announce@lists.ubuntu.com
Subject: [USN-1440-1] Linux kernel (Natty backport) vulnerabilities
Message-ID: <4FA8D1AD.4010005@canonical.com>
Content-Type: text/plain; charset="iso-8859-1"

==========================================================================
Ubuntu Security Notice USN-1440-1
May 08, 2012

linux-lts-backport-natty 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-lts-backport-natty: Linux kernel backport from Natty

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)

Sasha Levin discovered a flaw in the permission checking for device
assignments requested via the kvm ioctl in the Linux kernel. A local user
could use this flaw to crash the system causing a denial of service.
(CVE-2011-4347)

Stephan B??rwolf discovered a flaw in the KVM (kernel-based virtual
machine) subsystem of the Linux kernel. A local unprivileged user can crash
use this flaw to crash VMs causing a deny of service. (CVE-2012-0045)

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 10.04 LTS:
linux-image-2.6.38-15-generic 2.6.38-15.59~lucid1
linux-image-2.6.38-15-generic-pae 2.6.38-15.59~lucid1
linux-image-2.6.38-15-server 2.6.38-15.59~lucid1
linux-image-2.6.38-15-virtual 2.6.38-15.59~lucid1

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-1440-1
CVE-2011-4086, CVE-2011-4347, CVE-2012-0045, CVE-2012-1090,
CVE-2012-1097, CVE-2012-1146, CVE-2012-2100

Package Information:
https://launchpad.net/ubuntu/+source/linux-lts-backport-natty/2.6.38-15.59~lucid1

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