Updated firefox packages that fix multiple security issues are now available for Red Hat Enterprise Linux 5, 6, and 7.

Red Hat Product Security has rated this update as having Critical security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

Mozilla Firefox is an open source web browser. XULRunner provides the XUL Runtime environment for Mozilla Firefox.

Several flaws were found in the processing of malformed web content. A web page containing malicious content could cause Firefox to crash or, potentially, execute arbitrary code with the privileges of the user running Firefox. (CVE-2015-2708, CVE-2015-0797, CVE-2015-2710, CVE-2015-2713)

A heap-based buffer overflow flaw was found in the way Firefox processed compressed XML data. An attacker could create specially crafted compressed XML content that, when processed by Firefox, could cause it to crash or execute arbitrary code with the privileges of the user running Firefox. (CVE-2015-2716)

Red Hat would like to thank the Mozilla project for reporting these issues. Upstream acknowledges Jesse Ruderman, Mats Palmgren, Byron Campen, Steve Fink, Aki Helin, Atte Kettunen, Scott Bell, and Ucha Gobejishvili as the original reporters of these issues.

All Firefox users should upgrade to these updated packages, which contain Firefox version 38.0 ESR, which corrects these issues. After installing the update, Firefox must be restarted for the changes to take effect.

The version of Firefox installed on the remote Windows host is prior to 38.0. It is, therefore, affected by the following vulnerabilities :

  - A privilege escalation vulnerability exists in the     Inter-process Communications (IPC) implementation due     to a failure to validate the identity of a listener     process. (CVE-2011-3079)

  - An issue exists in the Mozilla updater in which DLL     files in the current working directory or Windows     temporary directories will be loaded, allowing the     execution of arbitrary code. (CVE-2015-0833 /     CVE-2015-2720)

  - Multiple memory corruption issues exist within the     browser engine. A remote attacker can exploit these to     corrupt memory and execute arbitrary code.
    (CVE-2015-2708, CVE-2015-2709)

  - A buffer overflow condition exists in SVGTextFrame.cpp     when rendering SVG graphics that are combined with     certain CSS properties due to improper validation of     user-supplied input. A remote attacker can exploit this     to cause a heap-based buffer overflow, resulting in the     execution of arbitrary code. (CVE-2015-2710)     
  - A security bypass vulnerability exists due to the     referrer policy not being enforced in certain situations     when opening links (e.g. using the context menu or a     middle-clicks by mouse). A remote attacker can exploit     this to bypass intended policy settings. (CVE-2015-2711)     
  - An out-of-bounds read and write issue exists in the     CheckHeapLengthCondition() function due to improper     JavaScript validation of heap lengths. A remote attacker     can exploit this, via a specially crafted web page, to     disclose memory contents. (CVE-2015-2712)

  - A use-after-free error exists due to improper processing     of text when vertical text is enabled. A remote attacker     can exploit this to dereference already freed memory.
    (CVE-2015-2713)

  - A use-after-free error exists in the     RegisterCurrentThread() function in nsThreadManager.cpp     due to a race condition related to media decoder threads     created during the shutdown process. A remote attacker     can exploit this to dereference already freed memory.
    (CVE-2015-2715)

  - A buffer overflow condition exists in the     XML_GetBuffer() function in xmlparse.c due to improper     validation of user-supplied input when handling     compressed XML content. An attacker can exploit this to     cause a buffer overflow, resulting in the execution of     arbitrary code. (CVE-2015-2716)

  - An integer overflow condition exists in the parseChunk()     function in MPEG4Extractor.cpp due to improper handling     of MP4 video metadata in chunks. A remote attacker can     exploit this, via specially crafted media content, to     cause a heap-based buffer overflow, resulting in the     execution of arbitrary code. (CVE-2015-2717)

  - A security bypass vulnerability exists in WebChannel.jsm     due to improper handling of message traffic. An     untrusted page hosting a trusted page within an iframe     can intercept webchannel responses for the trusted page.
    This allows a remote attacker, via a specially crafted     web page, to bypass origin restrictions, resulting in     the disclosure of sensitive information. (CVE-2015-2718)

  - Multiple integer overflow conditions exist in the     bundled libstagefright component due to improper     validation of user-supplied input when processing MPEG4     sample metadata. A remote attacker can exploit this, via     specially crafted media content, to execute arbitrary     code. (CVE-2015-4496)

The remote host is affected by the vulnerability described in GLSA-201605-06 (Mozilla Products: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in Firefox, NSS, NSPR, and       Thunderbird. Please review the CVE identifiers referenced below for       details.
  Impact :

    A remote attacker could entice a user to view a specially crafted web       page or email, possibly resulting in execution of arbitrary code or a       Denial of Service condition. Furthermore, a remote attacker may be able       to perform Man-in-the-Middle attacks, obtain sensitive information, spoof       the address bar, conduct clickjacking attacks, bypass security       restrictions and protection mechanisms, or have other unspecified       impacts.
  Workaround :

    There is no known workaround at this time.

ID	Name	Product	Family	Published	Updated	Severity
83378	CentOS 5 / 6 / 7 : firefox (CESA-2015:0988)	Nessus	CentOS Local Security Checks	5/13/2015	1/4/2021	high
83439	Firefox < 38.0 Multiple Vulnerabilities	Nessus	Windows	5/13/2015	6/23/2026	critical
91379	GLSA-201605-06 : Mozilla Products: Multiple vulnerabilities (Logjam) (SLOTH)	Nessus	Gentoo Local Security Checks	5/31/2016	12/5/2022	critical

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