The remote Ubuntu 14.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-2603-1 advisory.

    Jesse Ruderman, Mats Palmgren, Byron Campen, and Steve Fink discovered multiple memory safety issues in     Thunderbird. If a user were tricked in to opening a specially crafted message with scripting enabled, an     attacker could potentially exploit these to cause a denial of service via application crash, or execute     arbitrary code with the privileges of the user invoking Thunderbird. (CVE-2015-2708)

    Atte Kettunen discovered a buffer overflow during the rendering of SVG content with certain CSS properties     in some circumstances. If a user were tricked in to opening a specially crafted message with scripting     enabled, an attacker could potentially exploit this to cause a denial of service via application crash, or     execute arbitrary code with the privileges of the user invoking Thunderbird. (CVE-2015-2710)

    Scott Bell discovered a use-afer-free during the processing of text when vertical text is enabled. 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 privileges of the user     invoking Thunderbird. (CVE-2015-2713)

    Ucha Gobejishvili discovered a buffer overflow when parsing compressed XML content. If a user were tricked     in to opening a specially crafted message with scripting enabled, an attacker could potentially exploit     this to cause a denial of service via application crash, or execute arbitrary code with the privileges of     the user invoking Thunderbird. (CVE-2015-2716)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

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Ubuntu 14.04 LTS : Thunderbird vulnerabilities (USN-2603-1)

critical Nessus Plugin ID 83544

Version 2.11