ubuntu-security-announce Digest, Vol 92, Issue 10

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Today's Topics:

1. [USN-1447-1] libxml2 vulnerability (Jamie Strandboge)
2. [USN-1448-1] Linux kernel vulnerabilities (John Johansen)


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

Message: 1
Date: Mon, 21 May 2012 17:15:27 -0500
From: Jamie Strandboge <jamie@canonical.com>
To: ubuntu-security-announce@lists.ubuntu.com
Subject: [USN-1447-1] libxml2 vulnerability
Message-ID: <1337638527.3585.28.camel@localhost>
Content-Type: text/plain; charset="utf-8"

==========================================================================
Ubuntu Security Notice USN-1447-1
May 21, 2012

libxml2 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
- Ubuntu 8.04 LTS

Summary:

Applications using libxml2 could be made to crash or run programs as your
login if they opened a specially crafted file.

Software Description:
- libxml2: GNOME XML library

Details:

Juri Aedla discovered that libxml2 contained an off by one error in its
XPointer functionality. If a user or application linked against libxml2
were tricked into opening a specially crafted XML file, an attacker could
cause the application to crash or possibly execute arbitrary code with the
privileges of the user invoking the program.

Update instructions:

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

Ubuntu 12.04 LTS:
libxml2 2.7.8.dfsg-5.1ubuntu4.1

Ubuntu 11.10:
libxml2 2.7.8.dfsg-4ubuntu0.3

Ubuntu 11.04:
libxml2 2.7.8.dfsg-2ubuntu0.4

Ubuntu 10.04 LTS:
libxml2 2.7.6.dfsg-1ubuntu1.5

Ubuntu 8.04 LTS:
libxml2 2.6.31.dfsg-2ubuntu1.9

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

References:
http://www.ubuntu.com/usn/usn-1447-1
CVE-2011-3102

Package Information:
https://launchpad.net/ubuntu/+source/libxml2/2.7.8.dfsg-5.1ubuntu4.1
https://launchpad.net/ubuntu/+source/libxml2/2.7.8.dfsg-4ubuntu0.3
https://launchpad.net/ubuntu/+source/libxml2/2.7.8.dfsg-2ubuntu0.4
https://launchpad.net/ubuntu/+source/libxml2/2.7.6.dfsg-1ubuntu1.5
https://launchpad.net/ubuntu/+source/libxml2/2.6.31.dfsg-2ubuntu1.9


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Message: 2
Date: Mon, 21 May 2012 16:12:21 -0700
From: John Johansen <john.johansen@canonical.com>
To: ubuntu-security-announce@lists.ubuntu.com
Subject: [USN-1448-1] Linux kernel vulnerabilities
Message-ID: <4FBACBD5.9080905@canonical.com>
Content-Type: text/plain; charset="iso-8859-1"

==========================================================================
Ubuntu Security Notice USN-1448-1
May 21, 2012

linux 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: 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 12.04 LTS:
linux-image-3.2.0-24-generic 3.2.0-24.38
linux-image-3.2.0-24-generic-pae 3.2.0-24.38
linux-image-3.2.0-24-omap 3.2.0-24.38
linux-image-3.2.0-24-powerpc-smp 3.2.0-24.38
linux-image-3.2.0-24-powerpc64-smp 3.2.0-24.38
linux-image-3.2.0-24-virtual 3.2.0-24.38

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-1448-1
CVE-2012-1601, CVE-2012-2123

Package Information:
https://launchpad.net/ubuntu/+source/linux/3.2.0-24.38

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