The remote Ubuntu 14.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-2505-1 advisory.

    Matthew Noorenberghe discovered that Mozilla domains in the allowlist could make UITour API calls from     background tabs. If one of these domains were compromised and open in a background tab, an attacker could

    potentially exploit this to conduct clickjacking attacks. (CVE-2015-0819)

    Jan de Mooij discovered an issue that affects content using the Caja Compiler. If web content loads     specially crafted code, this could be used to bypass sandboxing security measures provided by Caja.
    (CVE-2015-0820)

    Armin Razmdjou discovered that opening hyperlinks with specific mouse and key combinations could allow a     Chrome privileged URL to be opened without context restrictions being preserved. If a user were tricked in     to opening a specially crafted website, an attacker could potentially exploit this to bypass security     restrictions. (CVE-2015-0821)

    Armin Razmdjou discovered that contents of locally readable files could be made available via manipulation     of form autocomplete in some circumstances. If a user were tricked in to opening a specially crafted     website, an attacker could potentially exploit this to obtain sensitive information. (CVE-2015-0822)

    Atte Kettunen discovered a use-after-free in the OpenType Sanitiser (OTS) 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-2015-0823)

    Atte Kettunen discovered a crash when drawing images using Cairo 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. (CVE-2015-0824)

    Atte Kettunen discovered a buffer underflow during playback of MP3 files in some circumstances. If a user     were tricked in to opening a specially crafted website, an attacker could potentially exploit this to     obtain sensitive information. (CVE-2015-0825)

    Atte Kettunen discovered a buffer overflow during CSS restyling 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 with the privileges of the user     invoking Firefox. (CVE-2015-0826)

    Abhishek Arya discovered an out-of-bounds read and write when rendering SVG content in some circumstances.
    If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit     this to obtain sensitive information. (CVE-2015-0827)

    A buffer overflow was discovered in libstagefright during video playback 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 with the privileges of the user     invoking Firefox. (CVE-2015-0829)

    Daniele Di Proietto discovered that WebGL could cause a crash 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. (CVE-2015-0830)

    Paul Bandha discovered a use-after-free in IndexedDB. 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 with the privileges of the user invoking Firefox. (CVE-2015-0831)

    Muneaki Nishimura discovered that a period appended to a hostname could bypass key pinning and HSTS in     some circumstances. A remote attacker could potentially exloit this to conduct a Machine-in-the-middle     (MITM) attack. (CVE-2015-0832)

    Alexander Kolesnik discovered that Firefox would attempt plaintext connections to servers when handling     turns: and stuns: URIs. A remote attacker could potentially exploit this by conducting a Machine-in-the-     middle (MITM) attack in order to obtain credentials. (CVE-2015-0834)

    Carsten Book, Christoph Diehl, Gary Kwong, Jan de Mooij, Liz Henry, Byron Campen, Tom Schuster, Ryan     VanderMeulen, Christian Holler, Jesse Ruderman, Randell Jesup, Robin Whittleton, Jon Coppeard, and Nikhil     Marathe 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 with the privileges of the user invoking Firefox.
    (CVE-2015-0835, CVE-2015-0836)

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 : Firefox vulnerabilities (USN-2505-1)

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Version 1.21