The remote Ubuntu 14.04 LTS / 16.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-3436-1 advisory.

    Multiple security issues were discovered in Thunderbird. If a user were tricked in to opening a specially     crafted website in a browsing-like context, an attacker could potentially exploit these to read     uninitialized memory, bypass phishing and malware protection, conduct cross-site scripting (XSS) attacks,     cause a denial of service via application crash, or execute arbitrary code. (CVE-2017-7793, CVE-2017-7810,     CVE-2017-7814, CVE-2017-7818, CVE-2017-7819, CVE-2017-7823, CVE-2017-7824)

    Martin Thomson discovered that NSS incorrectly generated handshake hashes. A remote attacker could     potentially exploit this to cause a denial of service via application crash, or execute arbitrary code.
    (CVE-2017-7805)

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.

Detections

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Ubuntu 14.04 LTS / 16.04 LTS : Thunderbird vulnerabilities (USN-3436-1)

critical Nessus Plugin ID 103808

Version 3.8