Synopsis
The remote Ubuntu host is missing a security-related patch.
Description
Gary Kwong, Christian Holler, and Byron Campen discovered multiple memory safety issues in Thunderbird. If a user were tricked in to opening a specially crafted message, an attacker could potentially exploit these to cause a denial of service via application crash, or execute arbitrary code with the privileges ofthe user invoking Thunderbird. (CVE-2015-4473)
Ronald Crane reported 3 security issues. If a user were tricked in to opening a specially crafted message, an attacker could potentially exploit these, in combination with another security vulnerability, to cause a denial of service via application crash, or execute arbitrary code with the privileges of the user invoking Thunderbird.
(CVE-2015-4487, CVE-2015-4488, CVE-2015-4489)
Gustavo Grieco discovered a heap overflow in gdk-pixbuf. If a user were tricked in to opening a specially crafted message, an attacker could potentially exploit this to cause a denial of service via application crash or execute arbitrary code with the priviliges of the user invoking Thunderbird. (CVE-2015-4491).
Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
Solution
Update the affected thunderbird package.