ubuntu-security-announce Digest, Vol 95, Issue 7

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Today's Topics:

1. [USN-1533-1] Linux kernel vulnerabilities (John Johansen)
2. [USN-1534-1] Linux kernel (EC2) vulnerabilities (John Johansen)
3. [USN-1535-1] Linux kernel vulnerabilities (John Johansen)


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

Message: 1
Date: Fri, 10 Aug 2012 15:16:19 -0700
From: John Johansen <john.johansen@canonical.com>
To: ubuntu-security-announce@lists.ubuntu.com
Subject: [USN-1533-1] Linux kernel vulnerabilities
Message-ID: <50258833.1030709@canonical.com>
Content-Type: text/plain; charset="iso-8859-1"

==========================================================================
Ubuntu Security Notice USN-1533-1
August 10, 2012

linux 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: Linux kernel

Details:

An error was discovered in the Linux kernel's network TUN/TAP device
implementation. A local user with access to the TUN/TAP interface (which is
not available to unprivileged users until granted by a root user) could
exploit this flaw to crash the system or potential gain administrative
privileges. (CVE-2012-2136)

Ulrich Obergfell discovered an error in the Linux kernel's memory
management subsystem on 32 bit PAE systems with more than 4GB of memory
installed. A local unprivileged user could exploit this flaw to crash the
system. (CVE-2012-2373)

A flaw was discovered in the Linux kernel's epoll system call. An
unprivileged local user could use this flaw to crash the system.
(CVE-2012-3375)

Some errors where discovered in the Linux kernel's UDF file system, which
is used to mount some CD-ROMs and DVDs. An unprivileged local user could
use these flaws to crash the system. (CVE-2012-3400)

Update instructions:

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

Ubuntu 11.10:
linux-image-3.0.0-24-generic 3.0.0-24.40
linux-image-3.0.0-24-generic-pae 3.0.0-24.40
linux-image-3.0.0-24-omap 3.0.0-24.40
linux-image-3.0.0-24-powerpc 3.0.0-24.40
linux-image-3.0.0-24-powerpc-smp 3.0.0-24.40
linux-image-3.0.0-24-powerpc64-smp 3.0.0-24.40
linux-image-3.0.0-24-server 3.0.0-24.40
linux-image-3.0.0-24-virtual 3.0.0-24.40

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-1533-1
CVE-2012-2136, CVE-2012-2373, CVE-2012-3375, CVE-2012-3400

Package Information:
https://launchpad.net/ubuntu/+source/linux/3.0.0-24.40

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Message: 2
Date: Fri, 10 Aug 2012 15:30:55 -0700
From: John Johansen <john.johansen@canonical.com>
To: ubuntu-security-announce@lists.ubuntu.com
Subject: [USN-1534-1] Linux kernel (EC2) vulnerabilities
Message-ID: <50258B9F.6090000@canonical.com>
Content-Type: text/plain; charset="iso-8859-1"

==========================================================================
Ubuntu Security Notice USN-1534-1
August 10, 2012

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 error was discovered in the Linux kernel's network TUN/TAP device
implementation. A local user with access to the TUN/TAP interface (which is
not available to unprivileged users until granted by a root user) could
exploit this flaw to crash the system or potential gain administrative
privileges. (CVE-2012-2136)

An error was discovered in the Linux kernel's memory subsystem (hugetlb).
An unprivileged local user could exploit this flaw to cause a denial of
service (crash the system). (CVE-2012-2390)

Update instructions:

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

Ubuntu 10.04 LTS:
linux-image-2.6.32-347-ec2 2.6.32-347.52

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-1534-1
CVE-2012-2136, CVE-2012-2390

Package Information:
https://launchpad.net/ubuntu/+source/linux-ec2/2.6.32-347.52

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Message: 3
Date: Fri, 10 Aug 2012 15:58:18 -0700
From: John Johansen <john.johansen@canonical.com>
To: ubuntu-security-announce@lists.ubuntu.com
Subject: [USN-1535-1] Linux kernel vulnerabilities
Message-ID: <5025920A.5040502@canonical.com>
Content-Type: text/plain; charset="iso-8859-1"

==========================================================================
Ubuntu Security Notice USN-1535-1
August 10, 2012

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 error was discovered in the Linux kernel's network TUN/TAP device
implementation. A local user with access to the TUN/TAP interface (which is
not available to unprivileged users until granted by a root user) could
exploit this flaw to crash the system or potential gain administrative
privileges. (CVE-2012-2136)

An error was discovered in the Linux kernel's memory subsystem (hugetlb).
An unprivileged local user could exploit this flaw to cause a denial of
service (crash the system). (CVE-2012-2390)

Update instructions:

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

Ubuntu 10.04 LTS:
linux-image-2.6.32-42-386 2.6.32-42.95
linux-image-2.6.32-42-generic 2.6.32-42.95
linux-image-2.6.32-42-generic-pae 2.6.32-42.95
linux-image-2.6.32-42-ia64 2.6.32-42.95
linux-image-2.6.32-42-lpia 2.6.32-42.95
linux-image-2.6.32-42-powerpc 2.6.32-42.95
linux-image-2.6.32-42-powerpc-smp 2.6.32-42.95
linux-image-2.6.32-42-powerpc64-smp 2.6.32-42.95
linux-image-2.6.32-42-preempt 2.6.32-42.95
linux-image-2.6.32-42-server 2.6.32-42.95
linux-image-2.6.32-42-sparc64 2.6.32-42.95
linux-image-2.6.32-42-sparc64-smp 2.6.32-42.95
linux-image-2.6.32-42-versatile 2.6.32-42.95
linux-image-2.6.32-42-virtual 2.6.32-42.95

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-1535-1
CVE-2012-2136, CVE-2012-2390

Package Information:
https://launchpad.net/ubuntu/+source/linux/2.6.32-42.95

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