USN-3117-1: GD library vulnerabilities

Medium

Vendor

Canonical Ubuntu

Versions Affected

• Canonical Ubuntu 14.04 LTS

Description

The GD library could be made to crash or run programs if it processed a
specially crafted image file. Software description: libgd2 – GD Graphics Library

Ibrahim El-Sayed discovered that the GD library incorrectly handled certain malformed Tiff images. If a user or automated system were tricked into processing a specially crafted Tiff image, an attacker could cause a denial of service. (CVE-2016-6911)

Ke Liu discovered that the GD library incorrectly handled certain integers when processing 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 applied to Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 16.10 (CVE-2016-7568)

Emmanuel Law discovered that the GD library incorrectly handled certain strings when creating 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-2016-8670)

Affected Products and Versions

_Severity is medium unless otherwise noted.
_

• All versions of Cloud Foundry cflinuxfs2 prior to v.1.90.0

Mitigation

Users of affected versions should apply the following mitigation:

• The Cloud Foundry project recommends that Cloud Foundry deployments run with cflinuxfs2 v.1.90.0 or later versions

Credit

Ibrahim El-Sayed, Ke Liu, Emmanuel Law

References

• <https://www.ubuntu.com/usn/usn-3117-1&gt;
• <http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-6911&gt;
• <http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-7568&gt;
• <http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-8670&gt;