The remote Ubuntu 14.04 LTS / 16.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-3076-1 advisory.

    Atte Kettunen discovered an out-of-bounds read when handling certain Content Security Policy (CSP)     directives in some circumstances. If a user were tricked in to opening a specially crafted website, an     attacker could potentially exploit this to cause a denial of service via application crash.
    (CVE-2016-2827)

    Christoph Diehl, Christian Holler, Gary Kwong, Nathan Froyd, Honza Bambas, Seth Fowler, Michael Smith,     Andrew McCreight, Dan Minor, Byron Campen, Jon Coppeard, Steve Fink, Tyson Smith, and Carsten Book     discovered multiple memory safety issues in Firefox. If a user were tricked in to opening a specially     crafted website, an attacker could potentially exploit these to cause a denial of service via application     crash, or execute arbitrary code. (CVE-2016-5256, CVE-2016-5257)

    Atte Kettunen discovered a heap buffer overflow during text conversion with some unicode characters. If a     user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to     cause a denial of service via application crash, or execute arbitrary code. (CVE-2016-5270)

    Abhishek Arya discovered an out of bounds read during the processing of text runs in some circumstances.
    If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit     this to cause a denial of service via application crash. (CVE-2016-5271)

    Abhishek Arya discovered a bad cast when processing layout with input elements in some circumstances. If a     user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to     cause a denial of service via application crash, or execute arbitrary code. (CVE-2016-5272)

    A crash was discovered in accessibility. If a user were tricked in to opening a specially crafted website,     an attacker could potentially exploit this to execute arbitrary code. (CVE-2016-5273)

    A use-after-free was discovered in web animations during restyling. If a user were tricked in to opening a     specially crafted website, an attacker could potentially exploit this to cause a denial of service via     application crash, or execute arbitrary code. (CVE-2016-5274)

    A buffer overflow was discovered when working with empty filters during canvas rendering. If a user were     tricked in to opening a specially crafted website, an attacker could potentially exploit this to cause a     denial of service via application crash, or execute arbitrary code. (CVE-2016-5275)

    A use-after-free was discovered in accessibility. If a user were tricked in to opening a specially crafted     website, an attacker could potentially exploit this to cause a denial of service via application crash, or     execute arbitrary code. (CVE-2016-5276)

    A use-after-free was discovered in web animations when destroying a timeline. If a user were tricked in to     opening a specially crafted website, an attacker could potentially exploit this to cause a denial of     service via application crash, or execute arbitrary code. (CVE-2016-5277)

    A buffer overflow was discovered when encoding image frames to images in some circumstances. If a user     were tricked in to opening a specially crafted website, an attacker could potentially exploit this to     cause a denial of service via application crash, or execute arbitrary code. (CVE-2016-5278)

    Rafael Gieschke discovered that the full path of files is available to web pages after a drag and drop     operation. An attacker could potentially exploit this to obtain sensitive information. (CVE-2016-5279)

    Mei Wang discovered a use-after-free when changing text direction. If a user were tricked in to opening a     specially crafted website, an attacker could potentially exploit this to cause a denial of service via     application crash, or execute arbitrary code. (CVE-2016-5280)

    Brian Carpenter discovered a use-after-free when manipulating SVG content in some circumstances. If a user     were tricked in to opening a specially crafted website, an attacker could potentially exploit this to     cause a denial of service via application crash, or execute arbitrary code. (CVE-2016-5281)

    Richard Newman discovered that favicons can be loaded through protocols not in the allowlist, such as     jar:. (CVE-2016-5282)

    Gavin Sharp discovered a timing attack vulnerability involving document resizes and link colours. If a     user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to     obtain sensitive information. (CVE-2016-5283)

    An issue was discovered with the preloaded Public Key Pinning (HPKP). If a machine-in-the-middle (MITM)     attacker was able to obtain a fraudulent certificate for a Mozilla site, they could exploit this by     providing malicious addon updates. (CVE-2016-5284)

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 / 16.04 LTS : Firefox vulnerabilities (USN-3076-1)

critical Nessus Plugin ID 93683

Version 2.15