The version of Mozilla Firefox ESR installed on the remote Mac OS X host is prior to 38.2.1. It is, therefore, affected by the following vulnerabilities :

  - A use-after-free error exists when handling restyling     operations during the resizing of canvas elements due to     the canvas references being recreated, thus destroying     the original references. A remote, unauthenticated     attacker can exploit this to deference already freed     memory, resulting in a denial of service condition or     the execution of arbitrary code. (CVE-2015-4497)

  - A security feature bypass vulnerability exists due to a     flaw that allows the manipulation of the 'data:' URL on     a loaded web page without install permission prompts     being displayed to the user. A remote, unauthenticated     attacker can exploit this to install add-ons from a     malicious source. (CVE-2015-4498)

Updated firefox packages that fix two 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.

A flaw was 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-2015-4497)

A flaw was found in the way Firefox handled installation of add-ons.
An attacker could use this flaw to bypass the add-on installation prompt, and trick the user inso installing an add-on from a malicious source. (CVE-2015-4498)

Red Hat would like to thank the Mozilla project for reporting these issues. Upstream acknowledges Jean-Max Reymond, Ucha Gobejishvili, and Bas Venis as the original reporters of these issues.

All Firefox users should upgrade to these updated packages, which contain Firefox version 38.2.1 ESR, which corrects these issues. After installing the update, Firefox must be restarted for the changes to take effect.

Mozilla Firefox was updated to version 38.2.1 ESR to fix several critical and non critical security vulnerabilities.

  - Firefox was updated to 38.2.1 ESR (bsc#943608)

  - MFSA 2015-94/CVE-2015-4497 (bsc#943557) Use-after-free     when resizing canvas element during restyling

  - MFSA 2015-95/CVE-2015-4498 (bsc#943558) Add-on     notification bypass through data URLs

  - Firefox was updated to 38.2.0 ESR (bsc#940806)

  - MFSA 2015-78/CVE-2015-4495 (bmo#1178058, bmo#1179262)     Same origin violation and local file stealing via PDF     reader

  - MFSA 2015-79/CVE-2015-4473/CVE-2015-4474 (bmo#1143130,     bmo#1161719, bmo#1177501, bmo#1181204, bmo#1184068,     bmo#1188590, bmo#1146213, bmo#1178890, bmo#1182711)     Miscellaneous memory safety hazards (rv:40.0 / rv:38.2)

  - MFSA 2015-80/CVE-2015-4475 (bmo#1175396) Out-of-bounds     read with malformed MP3 file

  - MFSA 2015-82/CVE-2015-4478 (bmo#1105914) Redefinition of     non-configurable JavaScript object properties

  - MFSA 2015-83/CVE-2015-4479 (bmo#1185115, bmo#1144107,     bmo#1170344, bmo#1186718) Overflow issues in     libstagefright

  - MFSA 2015-87/CVE-2015-4484 (bmo#1171540) Crash when     using shared memory in JavaScript

  - MFSA 2015-88/CVE-2015-4491 (bmo#1184009) Heap overflow     in gdk-pixbuf when scaling bitmap images

  - MFSA 2015-89/CVE-2015-4485/CVE-2015-4486 (bmo#1177948,     bmo#1178148) Buffer overflows on Libvpx when decoding     WebM video

  - MFSA 2015-90/CVE-2015-4487/CVE-2015-4488/CVE-2015-4489     (bmo#1176270, bmo#1182723, bmo#1171603) Vulnerabilities     found through code inspection

  - MFSA 2015-92/CVE-2015-4492 (bmo#1185820) Use-after-free     in XMLHttpRequest with shared workers

Mozilla NSS switched the CKBI ABI from 1.98 to 2.4, which is what Firefox 38ESR uses.

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The Mozilla Project reports :

MFSA 2015-95 Add-on notification bypass through data URLs

MFSA 2015-94 Use-after-free when resizing canvas element during restyling

Multiple security issues have been found in Iceweasel, Debian's version of the Mozilla Firefox web browser. The Common Vulnerabilities and Exposures project identifies the following problems :

  - CVE-2015-4497     Jean-Max Reymond and Ucha Gobejishvili discovered a     use-after-free vulnerability which occurs when resizing     of a canvas element is triggered in concert with style     changes. A web page containing malicious content can     cause Iceweasel to crash, or potentially, execute     arbitrary code with the privileges of the user running     Iceweasel.

  - CVE-2015-4498     Bas Venis reported a flaw in the handling of add-ons     installation. A remote attacker can take advantage of     this flaw to bypass the add-on installation prompt and     trick a user into installing an add-on from a malicious     source.

The version of Mozilla Firefox installed on the remote Windows host is prior to 40.0.3. It is, therefore, affected by the following vulnerabilities :

  - A use-after-free error exists when handling restyling     operations during the resizing of canvas elements due to     the canvas references being recreated, thus destroying     the original references. A remote, unauthenticated     attacker can exploit this to deference already freed     memory, resulting in a denial of service condition or     the execution of arbitrary code. (CVE-2015-4497)

  - A security feature bypass vulnerability exists due to a     flaw that allows the manipulation of the 'data:' URL on     a loaded web page without install permission prompts     being displayed to the user. A remote, unauthenticated     attacker can exploit this to install add-ons from a     malicious source. (CVE-2015-4498)

Mozilla Firefox was updated to 38.2.1 ESR, fixing two severe security bugs. (bsc#943608)

  - MFSA 2015-94/CVE-2015-4497 (bsc#943557): Use-after-free     when resizing canvas element during restyling

  - MFSA 2015-95/CVE-2015-4498 (bsc#943558): Add-on     notification bypass through data URLs

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

MozillaFirefox ESR was updated to version 38.4.0ESR to fix multiple security issues.

MFSA 2015-116/CVE-2015-4513 Miscellaneous memory safety hazards (rv:42.0 / rv:38.4)

MFSA 2015-122/CVE-2015-7188 Trailing whitespace in IP address hostnames can bypass same-origin policy

MFSA 2015-123/CVE-2015-7189 Buffer overflow during image interactions in canvas

MFSA 2015-127/CVE-2015-7193 CORS preflight is bypassed when non-standard Content-Type headers are received

MFSA 2015-128/CVE-2015-7194 Memory corruption in libjar through zip files

MFSA 2015-130/CVE-2015-7196 JavaScript garbage collection crash with Java applet

MFSA 2015-131/CVE-2015-7198/CVE-2015-7199/CVE-2015-7200 Vulnerabilities found through code inspection

MFSA 2015-132/CVE-2015-7197 Mixed content WebSocket policy bypass through workers

MFSA 2015-133/CVE-2015-7181/CVE-2015-7182/CVE-2015-7183 NSS and NSPR memory corruption issues

It also includes fixes from 38.3.0ESR :

MFSA 2015-96/CVE-2015-4500/CVE-2015-4501 Miscellaneous memory safety hazards (rv:41.0 / rv:38.3)

MFSA 2015-101/CVE-2015-4506 Buffer overflow in libvpx while parsing vp9 format video

MFSA 2015-105/CVE-2015-4511 Buffer overflow while decoding WebM video

MFSA 2015-106/CVE-2015-4509 Use-after-free while manipulating HTML media content

MFSA 2015-110/CVE-2015-4519 Dragging and dropping images exposes final URL after redirects

MFSA 2015-111/CVE-2015-4520 Errors in the handling of CORS preflight request headers

MFSA 2015-112/CVE-2015-4517/CVE-2015-4521/CVE-2015-4522 CVE-2015-7174/CVE-2015-7175/CVE-2015-7176/CVE-2015-7177 CVE-2015-7180 Vulnerabilities found through code inspection

It also includes fixes from the Firefox 38.2.1ESR release :

MFSA 2015-94/CVE-2015-4497 (bsc#943557) Use-after-free when resizing canvas element during restyling

MFSA 2015-95/CVE-2015-4498 (bsc#943558) Add-on notification bypass through data URLs

It also includes fixes from the Firefox 38.2.0ESR release :

MFSA 2015-79/CVE-2015-4473/CVE-2015-4474 Miscellaneous memory safety hazards (rv:40.0 / rv:38.2)

MFSA 2015-80/CVE-2015-4475 Out-of-bounds read with malformed MP3 file

MFSA 2015-82/CVE-2015-4478 Redefinition of non-configurable JavaScript object properties

MFSA 2015-83/CVE-2015-4479 Overflow issues in libstagefright

MFSA 2015-87/CVE-2015-4484 Crash when using shared memory in JavaScript

MFSA 2015-88/CVE-2015-4491 Heap overflow in gdk-pixbuf when scaling bitmap images

MFSA 2015-89/CVE-2015-4485/CVE-2015-4486 Buffer overflows on Libvpx when decoding WebM video

MFSA 2015-90/CVE-2015-4487/CVE-2015-4488/CVE-2015-4489 Vulnerabilities found through code inspection

MFSA 2015-92/CVE-2015-4492 Use-after-free in XMLHttpRequest with shared workers

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Oracle Linux 5 / 6 / 7 host has a package installed that is affected by multiple vulnerabilities as referenced in the ELSA-2015-1693 advisory.

    [38.2.1-1.0.1]
    - Add firefox-oracle-default-prefs.js and firefox-oracle-default-bookmarks.html       and remove the corresponding Red Hat files

    [38.2.1-1]
    - Update to 38.2.1 ESR

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of Mozilla Firefox ESR installed on the remote Windows host is prior to 38.2.1. It is, therefore, affected by the following vulnerabilities :

  - A use-after-free error exists when handling restyling     operations during the resizing of canvas elements due to     the canvas references being recreated, thus destroying     the original references. A remote, unauthenticated     attacker can exploit this to deference already freed     memory, resulting in a denial of service condition or     the execution of arbitrary code. (CVE-2015-4497)

  - A security feature bypass vulnerability exists due to a     flaw that allows the manipulation of the 'data:' URL on     a loaded web page without install permission prompts     being displayed to the user. A remote, unauthenticated     attacker can exploit this to install add-ons from a     malicious source. (CVE-2015-4498)

ID	Name	Product	Family	Published	Updated	Severity
85686	Firefox ESR < 38.2.1 Multiple Vulnerabilities (Mac OS X)	Nessus	MacOS X Local Security Checks	8/28/2015	3/3/2026	critical
85680	RHEL 5 / 6 / 7 : firefox (RHSA-2015:1693)	Nessus	Red Hat Local Security Checks	8/28/2015	5/29/2020	critical
85763	SUSE SLED12 / SLES12 Security Update : MozillaFirefox, mozilla-nss (SUSE-SU-2015:1476-1)	Nessus	SuSE Local Security Checks	9/3/2015	5/25/2022	critical
85699	FreeBSD : mozilla -- multiple vulnerabilities (237a201c-888b-487f-84d3-7d92266381d6)	Nessus	FreeBSD Local Security Checks	8/31/2015	1/6/2021	critical
85696	Debian DSA-3345-1 : iceweasel - security update	Nessus	Debian Local Security Checks	8/31/2015	1/11/2021	critical
85689	Firefox < 40.0.3 Multiple Vulnerabilities	Nessus	Windows	8/28/2015	6/23/2026	critical
85868	SUSE SLES11 Security Update : MozillaFirefox (SUSE-SU-2015:1504-1)	Nessus	SuSE Local Security Checks	9/9/2015	1/19/2021	critical
86498	CentOS 5 / 6 / 7 : firefox (CESA-2015:1693)	Nessus	CentOS Local Security Checks	10/22/2015	1/4/2021	critical
87063	SUSE SLES10 Security Update : Mozilla Firefox (SUSE-SU-2015:2081-1)	Nessus	SuSE Local Security Checks	11/25/2015	1/6/2021	critical
85679	Oracle Linux 5 / 6 / 7 : firefox (ELSA-2015-1693)	Nessus	Oracle Linux Local Security Checks	8/28/2015	10/22/2024	high
85688	Firefox ESR < 38.2.1 Multiple Vulnerabilities	Nessus	Windows	8/28/2015	6/23/2026	critical

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