The remote Ubuntu 14.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-2458-1 advisory.

    Christian Holler, Patrick McManus, Christoph Diehl, Gary Kwong, Jesse Ruderman, Byron Campen, Terrence     Cole, and Nils Ohlmeier 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-2014-8634, CVE-2014-8635)

    Bobby Holley discovered that some DOM objects with certain properties can bypass XrayWrappers in some     circumstances. If a user were tricked in to opening a specially crafted website, an attacker could     potentially exploit this to bypass security restrictions. (CVE-2014-8636)

    Michal Zalewski discovered a use of uninitialized memory when rendering malformed bitmap images on a     canvas element. If a user were tricked in to opening a specially crafted website, an attacker could     potentially exploit this to steal confidential information. (CVE-2014-8637)

    Muneaki Nishimura discovered that requests from navigator.sendBeacon() lack an origin header. If a user     were tricked in to opening a specially crafted website, an attacker could potentially exploit this to     conduct cross-site request forgery (XSRF) attacks. (CVE-2014-8638)

    Xiaofeng Zheng discovered that a web proxy returning a 407 response could inject cookies in to the     originally requested domain. If a user connected to a malicious web proxy, an attacker could potentially     exploit this to conduct session-fixation attacks. (CVE-2014-8639)

    Holger Fuhrmannek discovered a crash in Web Audio while manipulating timelines. 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-2014-8640)

    Mitchell Harper discovered a use-after-free in WebRTC. 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-2014-8641)

    Brian Smith discovered that OCSP responses would fail to verify if signed by a delegated OCSP responder     certificate with the id-pkix-ocsp-nocheck extension, potentially allowing a user to connect to a site with     a revoked certificate. (CVE-2014-8642)

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-2458-1)

high Nessus Plugin ID 80548

Version 1.21