libgd2 - multiple vulnerabilities

Multiple vulnerabilities have been identified in libgd2, a library
for programmatic graphics creation and manipulation. The Common
Vulnerabilities and Exposures project identifies the following problems:

• CVE-2007-2445
  Grayscale PNG files containing invalid tRNS chunk CRC values
  could cause a denial of service (crash), if a maliciously
  crafted image is loaded into an application using libgd.
• CVE-2007-3476
  An array indexing error in libgd’s GIF handling could induce a
  denial of service (crash with heap corruption) if exceptionally
  large color index values are supplied in a maliciously crafted
  GIF image file.
• CVE-2007-3477
  The imagearc() and imagefilledarc() routines in libgd allow
  an attacker in control of the parameters used to specify
  the degrees of arc for those drawing functions to perform
  a denial of service attack (excessive CPU consumption).
• CVE-2007-3996
  Multiple integer overflows exist in libgd’s image resizing and
  creation routines; these weaknesses allow an attacker in control
  of the parameters passed to those routines to induce a crash or
  execute arbitrary code with the privileges of the user running
  an application or interpreter linked against libgd2.

For the stable distribution (etch), these problems have been fixed in
version 2.0.33-5.2etch1.

For the unstable distribution (sid), these
problems have been fixed in version 2.0.35.dfsg-1.

We recommend that you upgrade your libgd2 packages.