ubuntu-security-announce Digest, Vol 93, Issue 10

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Today's Topics:

1. [USN-1476-1] Linux kernel (OMAP4) vulnerabilities (John Johansen)
2. [USN-1477-1] APT vulnerability (Jamie Strandboge)


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

Message: 1
Date: Fri, 15 Jun 2012 11:35:43 -0700
From: John Johansen <john.johansen@canonical.com>
To: ubuntu-security-announce@lists.ubuntu.com
Subject: [USN-1476-1] Linux kernel (OMAP4) vulnerabilities
Message-ID: <4FDB807F.9010106@canonical.com>
Content-Type: text/plain; charset="iso-8859-1"

==========================================================================
Ubuntu Security Notice USN-1476-1
June 15, 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:

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 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)

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)

Stephan Mueller reported a flaw in the Linux kernel's dl2k network driver's
handling of ioctls. An unprivileged local user could leverage this flaw to
cause a denial of service. (CVE-2012-2313)

Timo Warns reported multiple flaws in the Linux kernel's hfsplus
filesystem. An unprivileged local user could exploit these flaws to gain
root system priviliges. (CVE-2012-2319)

Xi Wang discovered a flaw in the Linux kernel's i915 graphics driver
handling of cliprect on 32 bit systems. An unprivileged local attacker
could leverage this flaw to cause a denial of service or potentially gain
root privileges. (CVE-2012-2383)

Xi Wang discovered a flaw in the Linux kernel's i915 graphics driver
handling of buffer_count on 32 bit systems. An unprivileged local attacker
could leverage this flaw to cause a denial of service or potentially gain
root privileges. (CVE-2012-2384)

Update instructions:

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

Ubuntu 11.10:
linux-image-3.0.0-1211-omap4 3.0.0-1211.23

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-1476-1
CVE-2011-4131, CVE-2012-2121, CVE-2012-2133, CVE-2012-2313,
CVE-2012-2319, CVE-2012-2383, CVE-2012-2384

Package Information:
https://launchpad.net/ubuntu/+source/linux-ti-omap4/3.0.0-1211.23

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

Message: 2
Date: Fri, 15 Jun 2012 16:36:20 -0500
From: Jamie Strandboge <jamie@canonical.com>
To: ubuntu-security-announce@lists.ubuntu.com
Subject: [USN-1477-1] APT vulnerability
Message-ID: <1339796180.30653.58.camel@localhost>
Content-Type: text/plain; charset="utf-8"

==========================================================================
Ubuntu Security Notice USN-1477-1
June 15, 2012

apt 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:

An attacker could trick APT into installing altered packages.

Software Description:
- apt: Advanced front-end for dpkg

Details:

Georgi Guninski discovered that APT did not properly validate imported
keyrings via apt-key net-update. USN-1475-1 added additional verification
for imported keyrings, but it was insufficient. If a remote attacker were
able to perform a man-in-the-middle attack, this flaw could potentially be
used to install altered packages. This update corrects the issue by
disabling the net-update option completely. A future update will re-enable
the option with corrected verification.

Update instructions:

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

Ubuntu 12.04 LTS:
apt 0.8.16~exp12ubuntu10.2

Ubuntu 11.10:
apt 0.8.16~exp5ubuntu13.5

Ubuntu 11.04:
apt 0.8.13.2ubuntu4.6

Ubuntu 10.04 LTS:
apt 0.7.25.3ubuntu9.13

Ubuntu 8.04 LTS:
apt 0.7.9ubuntu17.6

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

References:
http://www.ubuntu.com/usn/usn-1477-1
CVE-2012-0954

Package Information:
https://launchpad.net/ubuntu/+source/apt/0.8.16~exp12ubuntu10.2
https://launchpad.net/ubuntu/+source/apt/0.8.16~exp5ubuntu13.5
https://launchpad.net/ubuntu/+source/apt/0.8.13.2ubuntu4.6
https://launchpad.net/ubuntu/+source/apt/0.7.25.3ubuntu9.13
https://launchpad.net/ubuntu/+source/apt/0.7.9ubuntu17.6


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