(RHSA-2012:0301) Low: ImageMagick security and bug fix update

ImageMagick is an image display and manipulation tool for the X Window
System that can read and write multiple image formats.

It was found that ImageMagick utilities tried to load ImageMagick
configuration files from the current working directory. If a user ran an
ImageMagick utility in an attacker-controlled directory containing a
specially-crafted ImageMagick configuration file, it could cause the
utility to execute arbitrary code. (CVE-2010-4167)

This update also fixes the following bugs:

• Previously, the “identify -verbose” command failed with an assertion if
  there was no image information available. An upstream patch has been
  applied, so that GetImageOption() is now called correctly. Now, the
  “identify -verbose” command works correctly even if no image information is
  available. (BZ#502626)

• Previously, an incorrect use of the semaphore data type led to a
  deadlock. As a consequence, the ImageMagick utility could become
  unresponsive when converting JPEG files to PDF (Portable Document Format)
  files. A patch has been applied to address the deadlock issue, and JPEG
  files can now be properly converted to PDF files. (BZ#530592)

• Previously, running the “convert” command with the “-color” option failed
  with a memory allocation error. The source code has been modified to fix
  problems with memory allocation. Now, using the “convert” command with the
  “-color” option works correctly. (BZ#616538)

• Previously, ImageMagick could become unresponsive when using the
  “display” command on damaged GIF files. The source code has been revised to
  prevent the issue. ImageMagick now produces an error message in the
  described scenario. A file selector is now opened so the user can choose
  another image to display. (BZ#693989)

• Prior to this update, the “convert” command did not handle rotated PDF
  files correctly. As a consequence, the output was rendered as a portrait
  with the content being cropped. With this update, the PDF render geometry
  is modified, and the output produced by the “convert” command is properly
  rendered as a landscape. (BZ#694922)

All users of ImageMagick are advised to upgrade to these updated packages,
which contain backported patches to correct these issues. All running
instances of ImageMagick must be restarted for this update to take effect.