Stack consumption vulnerability in the gdImageFillToBorder function in gd.c in the GD Graphics Library (aka libgd) before 2.2.2, as used in PHP before 5.6.28 and 7.x before 7.0.13, allows remote attackers to cause a denial of service (segmentation violation) via a crafted imagefilltoborder call that triggers use of a negative color value.

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

Stefan Esser discovered that the GD library incorrectly handled memory when processing certain images. If a user or automated system were tricked into processing a specially crafted image, an attacker could cause a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2016-10166)

It was discovered that the GD library incorrectly handled certain malformed images. If a user or automated system were tricked into processing a specially crafted image, an attacker could cause a denial of service. (CVE-2016-10167)

It was discovered that the GD library incorrectly handled certain malformed images. If a user or automated system were tricked into processing a specially crafted image, an attacker could cause a denial of service, or possibly execute arbitrary code. (CVE-2016-10168)

Ibrahim El-Sayed discovered that the GD library incorrectly handled certain malformed TGA images. If a user or automated system were tricked into processing a specially crafted TGA image, an attacker could cause a denial of service. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2016-6906)

Ibrahim El-Sayed discovered that the GD library incorrectly handled certain malformed WebP images. If a user or automated system were tricked into processing a specially crafted WebP image, an attacker could cause a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu…