The remote host is missing an update to libgd2 announced via advisory USN-854-1.

The problem can be corrected by upgrading your system to the following package versions: Ubuntu 6.06 LTS: libgd2-noxpm 2.0.33-2ubuntu5.4 libgd2-xpm 2.0.33-2ubuntu5.4 Ubuntu 8.04 LTS: libgd2-noxpm 2.0.35.dfsg-3ubuntu2.1 libgd2-xpm 2.0.35.dfsg-3ubuntu2.1 Ubuntu 8.10: libgd2-noxpm 2.0.36~rc1~dfsg-3ubuntu1.8.10.1 libgd2-xpm 2.0.36~rc1~dfsg-3ubuntu1.8.10.1 Ubuntu 9.04: libgd2-noxpm 2.0.36~rc1~dfsg-3ubuntu1.9.04.1 libgd2-xpm 2.0.36~rc1~dfsg-3ubuntu1.9.04.1 Ubuntu 9.10: libgd2-noxpm 2.0.36~rc1~dfsg-3ubuntu1.9.10.1 libgd2-xpm 2.0.36~rc1~dfsg-3ubuntu1.9.10.1 In general, a standard system upgrade is sufficient to effect the necessary changes. https://secure1.securityspace.com/smysecure/catid.html?in=USN-854-1

Tomas Hoger discovered that the GD library did not properly handle the number of colors in certain malformed GD images. If a user or automated system were tricked into processing a specially crafted GD image, an attacker could cause a denial of service or possibly execute arbitrary code. (CVE-2009-3546) It was discovered that the GD library did not properly handle incorrect color indexes. An attacker could send specially crafted input to applications linked against libgd2 and cause a denial of service or possibly execute arbitrary code. This issue only affected Ubuntu 6.06 LTS. (CVE-2009-3293) It was discovered that the GD library did not properly handle certain malformed GIF images. If a user or automated system were tricked into processing a specially crafted GIF image, an attacker could cause a denial of service. This issue only affected Ubuntu 6.06 LTS. (CVE-2007-3475, CVE-2007-3476) It was discovered that the GD library did not properly handle large angle degree values. An attacker could send specially crafted input to applications linked against libgd2 and cause a denial of service. This issue only affected Ubuntu 6.06 LTS. (CVE-2007-3477)