An updated firefox package that fixes various security issues is now available for Red Hat Enterprise Linux 4 and 5.

This update has been rated as having critical security impact by the Red Hat Security Response Team.

Mozilla Firefox is an open source Web browser.

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 as the user running Firefox.
(CVE-2008-5500, CVE-2008-5501, CVE-2008-5502, CVE-2008-5511, CVE-2008-5512, CVE-2008-5513)

Several flaws were found in the way malformed content was processed. A website containing specially crafted content could potentially trick a Firefox user into surrendering sensitive information. (CVE-2008-5506, CVE-2008-5507)

A flaw was found in the way Firefox stored attributes in XML User Interface Language (XUL) elements. A website could use this flaw to track users across browser sessions, even if users did not allow the site to store cookies in the victim's browser. (CVE-2008-5505)

A flaw was found in the way malformed URLs were processed by Firefox.
This flaw could prevent various URL sanitization mechanisms from properly parsing a malicious URL. (CVE-2008-5508)

A flaw was found in Firefox's CSS parser. A malicious web page could inject NULL characters into a CSS input string, possibly bypassing an application's script sanitization routines. (CVE-2008-5510)

For technical details regarding these flaws, please see the Mozilla security advisories for Firefox 3.0.5. You can find a link to the Mozilla advisories in the References section.

Note: after the errata packages are installed, Firefox must be restarted for the update to take effect.

All firefox users should upgrade to these updated packages, which contain backported patches that correct these issues.

Several flaws were discovered in the browser engine. These problems could allow an attacker to crash the browser and possibly execute arbitrary code with user privileges. (CVE-2008-5500)

Boris Zbarsky discovered that the same-origin check in Firefox could be bypassed by utilizing XBL-bindings. An attacker could exploit this to read data from other domains. (CVE-2008-5503)

Marius Schilder discovered that Firefox did not properly handle redirects to an outside domain when an XMLHttpRequest was made to a same-origin resource. It's possible that sensitive information could be revealed in the XMLHttpRequest response. (CVE-2008-5506)

Chris Evans discovered that Firefox did not properly protect a user's data when accessing a same-domain JavaScript URL that is redirected to an unparsable JavaScript off-site resource. If a user were tricked into opening a malicious website, an attacker may be able to steal a limited amount of private data. (CVE-2008-5507)

Several flaws were discovered in the JavaScript engine. If a user were tricked into opening a malicious website, an attacker could exploit this to execute arbitrary JavaScript code within the context of another website or with chrome privileges. (CVE-2008-5511, CVE-2008-5512).

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

The remote host is affected by the vulnerability described in GLSA-201301-01 (Mozilla Products: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in Mozilla Firefox,       Thunderbird, SeaMonkey, NSS, GNU IceCat, and XULRunner. 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,       bypass restrictions and protection mechanisms, force file downloads,       conduct XML injection attacks, conduct XSS attacks, bypass the Same       Origin Policy, spoof URL&rsquo;s for phishing attacks, trigger a vertical       scroll, spoof the location bar, spoof an SSL indicator, modify the       browser&rsquo;s font, conduct clickjacking attacks, or have other unspecified       impact.
    A local attacker could gain escalated privileges, obtain sensitive       information, or replace an arbitrary downloaded file.
  Workaround :

    There is no known workaround at this time.

Versions of Mozilla Thunderbird prior to 2.0.0.19 are affected by the following vulnerabilities :

 - There are several stability bugs in the browser engine that may lead to crashes with evidence of memory corruption. (MFSA 2008-60)
 - XBL bindings can be used to read data from other domains. (MFSA 2008-61)
 - Sensitive data may be disclosed in an XHR response when an XMLHttpRequest is made to a same-origin resource, which 302 redirects to a resource in a different domain. (MFSA 2008-64)
 - A website may be able to access a limited amount of data from a different domain by loading a same-domain JavaScript URL that redirects to an off-domain target resource containing data that is not parsable as JavaScript. (MFSA 2008-65)
 - Errors arise when parsing URLs with leading whitespace and control characters. (MFSA 2008-66)
 - An escaped null byte is ignored by the CSS parser and treated as if it was not present in the CSS input string. (MFSA 2008-67)
 - XSS and JavaScript privilege escalation are possible. (MFSA 2008-68)

Versions of Firefox 3.x prior to 3.0.5 are affected by the following security issues : 

 - There are several stability bugs in the browser engine that may lead to crashes with evidence of memory corruption. (MFSA 2008-60)
 - XBL bindings can be used to read data from other domains. (MFSA 2008-61)
 - The feed preview still allows for JavaScript privilege escalation. (MFSA 2008-62)
 - Sensitive data may be disclosed in an XHR response when an XMLHttpRequest is made to a same-origin resource, which 302 redirects to a resource in a different domain. (MFSA 2008-64)
 - A website may be able to access a limited amount of data from a different domain by loading a same-domain JavaScript URL which redirects to an off-domain target resource containing data that is not parsable as JavaScript. (MFSA 2008-65)
 - Errors arise when parsing URLs with leading whitespace and control characters. (MFSA 2008-66)
 - An escaped null byte is ignored by the CSS parser and treated as if it was not present in the CSS input string. (MFSA 2008-67)
 - XSS and JavaScript privilege escalation are possible. (MFSA 2008-68)
 - XSS vulnerabilities in SessionStore may allow for violating the browser's same-origin policy and performing an XSS attack or running arbitrary JavaScript with chrome privileges. (MFSA 2008-69)
 - A denial of service issue when the application handles a maliciously crafted webpage containing a 'HTMLSelectElement' object with a large length attribute.

The installed version of SeaMonkey is earlier than 1.1.14.  Such versions are potentially affected by the following security issues : 

  - There are several stability bugs in the browser engine that may lead to crashes with evidence of memory corruption. (MFSA 2008-60)

  - XBL bindings can be used to read data from other domains. (MFSA 2008-61)

  - The feed preview still allows for JavaScript privilege escalation. (MFSA 2008-62)

  - Sensitive data may be disclosed in an XHR response when an XMLHttpRequest is made to a same-origin resource, which 302 redirects to a resource in a different domain. (MFSA 2008-64)

  - A website may be able to access a limited amount of data from a different domain by loading a same-domain JavaScript URL which redirects to an off-domain target resource containing data that is not parsable as JavaScript. (MFSA 2008-65)

  - Errors arise when parsing URLs with leading whitespace and control characters. (MFSA 2008-66)

  - An escaped null byte is ignored by the CSS parser and treated as if it was not present in the CSS input string. (MFSA 2008-67)

  - XSS and JavaScript privilege escalation are possible. (MFSA 2008-68)

  - XSS vulnerabilities in SessionStore may allow for violating the browser's same-origin policy and performing an XSS attack or running arbitrary JavaScript with chrome privileges. (MFSA 2008-69)

The installed version of Firefox is earlier than 2.0.0.19.  Such versions are potentially affected by the following security issues : 

 - There are several stability bugs in the browser engine that may lead to crashes with evidence of memory corruption. (MFSA 2008-60)
 - XBL bindings can be used to read data from other domains. (MFSA 2008-61)
 - The feed preview still allows for JavaScript privilege escalation. (MFSA 2008-62)
 - Sensitive data may be disclosed in an XHR response when an XMLHttpRequest is made to a same-origin resource, which 302 redirects to a resource in a different domain. (MFSA 2008-64)
 - A website may be able to access a limited amount of data from a different domain by loading a same-domain JavaScript URL which redirects to an off-domain target resource containing data that is not parsable as JavaScript. (MFSA 2008-65)
 - Errors arise when parsing URLs with leading whitespace and control characters. (MFSA 2008-66)
 - An escaped null byte is ignored by the CSS parser and treated as if it was not present in the CSS input string. (MFSA 2008-67)
 - XSS and JavaScript privilege escalation are possible. (MFSA 2008-68)
 - XSS vulnerabilities in SessionStore may allow for violating the browser's same-origin policy and performing an XSS attack or running arbitrary JavaScript with chrome privileges. (MFSA 2008-69) Note that Mozilla is not planning further security / stability updates for Firefox 2.x.
  - A denial of service issue when the application handles a maliciously crafted webpage containing a 'HTMLSelectElement' object with a large length attribute.

ID	Name	Product	Family	Published	Updated	Severity
43721	CentOS 4 / 5 : firefox (CESA-2008:1036)	Nessus	CentOS Local Security Checks	1/6/2010	1/4/2021	critical
65111	Ubuntu 6.06 LTS : firefox vulnerabilities (USN-690-3)	Nessus	Ubuntu Local Security Checks	3/9/2013	1/19/2021	critical
63402	GLSA-201301-01 : Mozilla Products: Multiple vulnerabilities (BEAST)	Nessus	Gentoo Local Security Checks	1/8/2013	10/6/2025	critical
4806	Mozilla Thunderbird < 2.0.0.19 Multiple Vulnerabilities	Nessus Network Monitor	SMTP Clients	1/6/2009	3/6/2019	medium
4793	Mozilla Firefox 3.x < 3.0.5 Multiple Vulnerabilities	Nessus Network Monitor	Web Clients	12/17/2008	3/6/2019	medium
4794	SeaMonkey < 1.1.14 Multiple Vulnerabilities	Nessus Network Monitor	Web Clients	12/17/2008	3/6/2019	medium
4792	Mozilla Firefox < 2.0.0.19 Multiple Vulnerabilities	Nessus Network Monitor	Web Clients	12/17/2008	3/6/2019	medium

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