ubuntu-security-announce Digest, Vol 92, Issue 14

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Today's Topics:

1. [USN-1452-1] Linux kernel vulnerabilities (John Johansen)
2. [USN-1453-1] Linux kernel (EC2) vulnerabilities (John Johansen)
3. [USN-1454-1] Linux kernel vulnerability (John Johansen)


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

Message: 1
Date: Fri, 25 May 2012 12:19:00 -0700
From: John Johansen <john.johansen@canonical.com>
To: ubuntu-security-announce@lists.ubuntu.com
Subject: [USN-1452-1] Linux kernel vulnerabilities
Message-ID: <4FBFDB24.4030309@canonical.com>
Content-Type: text/plain; charset="iso-8859-1"

==========================================================================
Ubuntu Security Notice USN-1452-1
May 25, 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:

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-3.0.0-20-generic 3.0.0-20.34
linux-image-3.0.0-20-generic-pae 3.0.0-20.34
linux-image-3.0.0-20-omap 3.0.0-20.34
linux-image-3.0.0-20-powerpc 3.0.0-20.34
linux-image-3.0.0-20-powerpc-smp 3.0.0-20.34
linux-image-3.0.0-20-powerpc64-smp 3.0.0-20.34
linux-image-3.0.0-20-server 3.0.0-20.34
linux-image-3.0.0-20-virtual 3.0.0-20.34

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-1452-1
CVE-2012-1601, CVE-2012-2123

Package Information:
https://launchpad.net/ubuntu/+source/linux/3.0.0-20.34

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Message: 2
Date: Fri, 25 May 2012 12:37:56 -0700
From: John Johansen <john.johansen@canonical.com>
To: ubuntu-security-announce@lists.ubuntu.com
Subject: [USN-1453-1] Linux kernel (EC2) vulnerabilities
Message-ID: <4FBFDF94.2050708@canonical.com>
Content-Type: text/plain; charset="iso-8859-1"

==========================================================================
Ubuntu Security Notice USN-1453-1
May 25, 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:

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 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 10.04 LTS:
linux-image-2.6.32-345-ec2 2.6.32-345.48

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

References:
http://www.ubuntu.com/usn/usn-1453-1
CVE-2011-4086, CVE-2012-1601, CVE-2012-2123

Package Information:
https://launchpad.net/ubuntu/+source/linux-ec2/2.6.32-345.48

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Message: 3
Date: Fri, 25 May 2012 12:53:07 -0700
From: John Johansen <john.johansen@canonical.com>
To: ubuntu-security-announce@lists.ubuntu.com
Subject: [USN-1454-1] Linux kernel vulnerability
Message-ID: <4FBFE323.3030802@canonical.com>
Content-Type: text/plain; charset="iso-8859-1"

==========================================================================
Ubuntu Security Notice USN-1454-1
May 25, 2012

linux vulnerability
==========================================================================

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

- Ubuntu 8.04 LTS

Summary:

The system could be made to crash or become unresponsive under certain
conditions.

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.

Update instructions:

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

Ubuntu 8.04 LTS:
linux-image-2.6.24-31-386 2.6.24-31.101
linux-image-2.6.24-31-generic 2.6.24-31.101
linux-image-2.6.24-31-hppa32 2.6.24-31.101
linux-image-2.6.24-31-hppa64 2.6.24-31.101
linux-image-2.6.24-31-itanium 2.6.24-31.101
linux-image-2.6.24-31-lpia 2.6.24-31.101
linux-image-2.6.24-31-lpiacompat 2.6.24-31.101
linux-image-2.6.24-31-mckinley 2.6.24-31.101
linux-image-2.6.24-31-openvz 2.6.24-31.101
linux-image-2.6.24-31-powerpc 2.6.24-31.101
linux-image-2.6.24-31-powerpc-smp 2.6.24-31.101
linux-image-2.6.24-31-powerpc64-smp 2.6.24-31.101
linux-image-2.6.24-31-rt 2.6.24-31.101
linux-image-2.6.24-31-server 2.6.24-31.101
linux-image-2.6.24-31-sparc64 2.6.24-31.101
linux-image-2.6.24-31-sparc64-smp 2.6.24-31.101
linux-image-2.6.24-31-virtual 2.6.24-31.101
linux-image-2.6.24-31-xen 2.6.24-31.101

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

References:
http://www.ubuntu.com/usn/usn-1454-1
CVE-2011-4086

Package Information:
https://launchpad.net/ubuntu/+source/linux/2.6.24-31.101

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