[UNIX] Multiple Vendor ImageMagick Multiple Integer Overflow Vulnerabilities

The following security advisory is sent to the securiteam mailing list, and can be found at the SecuriTeam web site: http://www.securiteam.com
- - promotion

The SecuriTeam alerts list - Free, Accurate, Independent.

Get your security news from a reliable source.
http://www.securiteam.com/mailinglist.html

- - - - - - - - -

Multiple Vendor ImageMagick Multiple Integer Overflow Vulnerabilities
------------------------------------------------------------------------

SUMMARY

<http://www.imagemagick.org/> ImageMagick is "a suite of image
manipulation tools (animate, composite, conjure, convert, display,
identify, import, mogrify and montage) that are sometimes used by other
applications for processing image files". Remote exploitation of multiple
integer overflow vulnerabilities in ImageMagick, as included in various
vendors' operating system distributions, allows attackers to crash
applications using the ImageMagick library, and in some cases, execute
arbitrary code.

DETAILS

Vulnerable Systems:
* ImageMagick version 6.3.4

Immune Systems:
* ImageMagick version 6.3.5-9

Several integer overflow vulnerabilities have been identified in
ImageMagick's handling of various file formats. By creating a specially
crafted DCM, DIB, XBM, XCF, or XWD image file, an attacker can cause a
heap buffer of insufficient size to be allocated. This results in a
heap-based buffer overflow.

Analysis:
Exploitation of these vulnerabilities allows an attacker to crash the
programs using ImageMagick library, or execute arbitrary code in the
context of the user.

One way of exploiting these vulnerabilities is to persuade a targeted user
to open a malicious image file with a program that utilizes the
ImageMagick library.

As the tools that are part of ImageMagick are sometimes used as helper
tools by other applications, this user may be the same as the web server
user. This scenario is somewhat more severe than the previously described
attack vector since the image processing can occur automatically.

Workaround:
Exposure to some of these vulnerabilities can be mitigated by moving or
deleting the related module files. The file locations may vary between
distributions. The globbing expressions listed below correspond to a Red
Hat Linux system.

/usr/lib/ImageMagick-*/modules*/coders/dcm.*
/usr/lib/ImageMagick-*/modules*/coders/dib.*
/usr/lib/ImageMagick-*/modules*/coders/xbm.*
/usr/lib/ImageMagick-*/modules*/coders/xcf.*
/usr/lib/ImageMagick-*/modules*/coders/xwd.*

Vendor response:
The ImageMagick maintainers have addressed these vulnerabilities with the
release of version 6.3.5-9. More information is available from the
following URL.
<http://studio.imagemagick.org/pipermail/magick-announce/2007-September/000037.html> http://studio.imagemagick.org/pipermail/magick-announce/2007-September/000037.html

CVE Information:
<http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4986>
CVE-2007-4986

Disclosure timeline:
09/04/2007 - Initial vendor notification
09/05/2007 - Initial vendor response
09/19/2007 - Coordinated public disclosure

ADDITIONAL INFORMATION

The information has been provided by
<mailto:idlabs-advisories@idefense.com> iDefense Labs Security Advisories.
The original article can be found at:
<http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=594>

http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=594

========================================

This bulletin is sent to members of the SecuriTeam mailing list.
To unsubscribe from the list, send mail with an empty subject line and body to: list-unsubscribe@securiteam.com
In order to subscribe to the mailing list, simply forward this email to: list-subscribe@securiteam.com

====================
====================

DISCLAIMER:
The information in this bulletin is provided "AS IS" without warranty of any kind.
In no event shall we be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages.