Integer signedness error in GD Graphics Library 2.1.1 (aka libgd or libgd2) allows remote attackers to cause a denial of service (crash) or potentially execute arbitrary code via crafted compressed gd2 data, which triggers a heap-based buffer overflow.

Affected: Ubuntu:14.04:LTS: libgd2, Ubuntu:16.04:LTS: libgd2

It was discovered that the GD library incorrectly handled certain color tables in XPM images. If a user or automated system were tricked into processing a specially crafted XPM image, an attacker could cause a denial of service. This issue only affected Ubuntu 12.04 LTS and Ubuntu 14.04 LTS. (CVE-2014-2497)

It was discovered that the GD library incorrectly handled 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 12.04 LTS and Ubuntu 14.04 LTS. (CVE-2014-9709)

It was discovered that the GD library incorrectly handled memory when using gdImageFillToBorder(). A remote attacker could possibly use this issue to cause a denial of service. (CVE-2015-8874)

It was discovered that the GD library incorrectly handled memory when using gdImageScaleTwoPass(). A remote attacker could possibly use this issue to cause a denial of service. This issue only applied to Ubuntu 14.04 LTS, Ubuntu 15.10 and Ubuntu 16.04 LTS. (CVE-2015-8877)

Hans Jerry Illikainen discovered that the GD library incorrectly handled 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-2016-3074)