ubuntu-security-announce Digest, Vol 94, Issue 11

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Today's Topics:

1. [USN-1513-1] libexif vulnerabilities (Marc Deslauriers)
2. [USN-1515-1] Linux kernel vulnerability (John Johansen)


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

Message: 1
Date: Mon, 23 Jul 2012 15:08:24 -0400
From: Marc Deslauriers <marc.deslauriers@canonical.com>
To: ubuntu-security-announce@lists.ubuntu.com
Subject: [USN-1513-1] libexif vulnerabilities
Message-ID: <1343070504.10718.300.camel@mdlinux>
Content-Type: text/plain; charset="utf-8"

==========================================================================
Ubuntu Security Notice USN-1513-1
July 23, 2012

libexif vulnerabilities
==========================================================================

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:

libexif could be made to crash, run programs as your login, or expose
sensitive information if it opened a specially crafted file.

Software Description:
- libexif: library to parse EXIF files

Details:

Mateusz Jurczyk discovered that libexif incorrectly parsed certain
malformed EXIF tags. If a user or automated system were tricked into
processing a specially crafted image file, an attacker could cause libexif
to crash, leading to a denial of service, or possibly obtain sensitive
information. (CVE-2012-2812, CVE-2012-2813)

Mateusz Jurczyk discovered that libexif incorrectly parsed certain
malformed EXIF tags. If a user or automated system were tricked into
processing a specially crafted image file, an attacker could cause libexif
to crash, leading to a denial of service, or possibly execute arbitrary
code. (CVE-2012-2814)

Yunho Kim discovered that libexif incorrectly parsed certain malformed EXIF
tags. If a user or automated system were tricked into processing a
specially crafted image file, an attacker could cause libexif to crash,
leading to a denial of service, or possibly obtain sensitive information.
(CVE-2012-2836)

Yunho Kim discovered that libexif incorrectly parsed certain malformed EXIF
tags. If a user or automated system were tricked into processing a
specially crafted image file, an attacker could cause libexif to crash,
leading to a denial of service. (CVE-2012-2837)

Dan Fandrich discovered that libexif incorrectly parsed certain malformed
EXIF tags. If a user or automated system were tricked into processing a
specially crafted image file, an attacker could cause libexif to crash,
leading to a denial of service, or possibly execute arbitrary code.
(CVE-2012-2840, CVE-2012-2841)

Update instructions:

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

Ubuntu 12.04 LTS:
libexif12 0.6.20-2ubuntu0.1

Ubuntu 11.10:
libexif12 0.6.20-1ubuntu0.1

Ubuntu 11.04:
libexif12 0.6.20-0ubuntu1.1

Ubuntu 10.04 LTS:
libexif12 0.6.19-1ubuntu0.1

Ubuntu 8.04 LTS:
libexif12 0.6.16-2.1ubuntu0.2

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

References:
http://www.ubuntu.com/usn/usn-1513-1
CVE-2012-2812, CVE-2012-2813, CVE-2012-2814, CVE-2012-2836,
CVE-2012-2837, CVE-2012-2840, CVE-2012-2841

Package Information:
https://launchpad.net/ubuntu/+source/libexif/0.6.20-2ubuntu0.1
https://launchpad.net/ubuntu/+source/libexif/0.6.20-1ubuntu0.1
https://launchpad.net/ubuntu/+source/libexif/0.6.20-0ubuntu1.1
https://launchpad.net/ubuntu/+source/libexif/0.6.19-1ubuntu0.1
https://launchpad.net/ubuntu/+source/libexif/0.6.16-2.1ubuntu0.2


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Message: 2
Date: Mon, 23 Jul 2012 13:11:02 -0700
From: John Johansen <john.johansen@canonical.com>
To: ubuntu-security-announce@lists.ubuntu.com
Subject: [USN-1515-1] Linux kernel vulnerability
Message-ID: <500DAFD6.7040109@canonical.com>
Content-Type: text/plain; charset="iso-8859-1"

==========================================================================
Ubuntu Security Notice USN-1515-1
July 23, 2012

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

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

- Ubuntu 12.04 LTS

Summary:

The system could be made to crash under certain conditions.

Software Description:
- linux: Linux kernel

Details:

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).

Update instructions:

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

Ubuntu 12.04 LTS:
linux-image-3.2.0-27-generic 3.2.0-27.43
linux-image-3.2.0-27-generic-pae 3.2.0-27.43
linux-image-3.2.0-27-highbank 3.2.0-27.43
linux-image-3.2.0-27-omap 3.2.0-27.43
linux-image-3.2.0-27-powerpc-smp 3.2.0-27.43
linux-image-3.2.0-27-powerpc64-smp 3.2.0-27.43
linux-image-3.2.0-27-virtual 3.2.0-27.43

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-1515-1
CVE-2012-2390

Package Information:
https://launchpad.net/ubuntu/+source/linux/3.2.0-27.43

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