It was discovered that there was a stack consumption vulnerability
in the libgd2 graphics library which allowed remote attackers to
cause a denial of service via a crafted imagefilltoborder call.
For Debian 7 Wheezy, this issue has been fixed in libgd2 version
2.0.36~rc1~dfsg-6.1+deb7u3.
We recommend that you upgrade your libgd2 packages.