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 as the user running Firefox.
(CVE-2009-2462, CVE-2009-2463, CVE-2009-2464, CVE-2009-2465, CVE-2009-2466, CVE-2009-2467, CVE-2009-2469, CVE-2009-2471)

Several flaws were found in the way Firefox handles malformed JavaScript code. A website containing malicious content could launch a cross-site scripting (XSS) attack or execute arbitrary JavaScript with the permissions of another website. (CVE-2009-2472)

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.

The version of Firefox installed on the remote macOS or Mac OS X host is prior to 3.5. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2009-34 advisory.

  - The JavaScript engine in Mozilla Firefox before 3.0.12 and Thunderbird allows remote attackers to cause a     denial of service (memory corruption and application crash) or possibly execute arbitrary code via vectors     related to (1) nsDOMClassInfo.cpp, (2) JS_HashTableRawLookup, and (3) MirrorWrappedNativeParent and     js_LockGCThingRT. (CVE-2009-2466)

  - Mozilla Firefox before 3.0.12 and Thunderbird allow remote attackers to cause a denial of service (memory     corruption and application crash) or execute arbitrary code via vectors involving double frame     construction, related to (1) nsHTMLContentSink.cpp, (2) nsXMLContentSink.cpp, and (3) nsPresShell.cpp, and     the nsSubDocumentFrame::Reflow function. (CVE-2009-2465)

  - The browser engine in Mozilla Firefox before 3.0.12 and Thunderbird allows remote attackers to cause a     denial of service (memory corruption and application crash) or possibly execute arbitrary code via vectors     related to (1) the frame chain and synchronous events, (2) a SetMayHaveFrame assertion and     nsCSSFrameConstructor::CreateFloatingLetterFrame, (3) nsCSSFrameConstructor::ConstructFrame, (4) the child     list and initial reflow, (5) GetLastSpecialSibling, (6) nsFrameManager::GetPrimaryFrameFor and MathML, (7)     nsFrame::GetBoxAscent, (8) nsCSSFrameConstructor::AdjustParentFrame, (9) nsDOMOfflineResourceList, and     (10) nsContentUtils::ComparePosition. (CVE-2009-2462)

  - Multiple integer overflows in the (1) PL_Base64Decode and (2) PL_Base64Encode functions in     nsprpub/lib/libc/src/base64.c in Mozilla Firefox before 3.0.12, Thunderbird before 2.0.0.24, and SeaMonkey     before 1.1.19 allow remote attackers to cause a denial of service (memory corruption and application     crash) or possibly execute arbitrary code via unspecified vectors that trigger buffer overflows.
    (CVE-2009-2463)

  - The nsXULTemplateQueryProcessorRDF::CheckIsSeparator function in Mozilla Firefox before 3.0.12, SeaMonkey     2.0a1pre, and Thunderbird allows remote attackers to cause a denial of service (memory corruption and     application crash) or possibly execute arbitrary code via vectors related to loading multiple RDF files in     a XUL tree element. (CVE-2009-2464)

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

The MozillaFirefox 3.0.12 release fixes various bugs and some critical security issues.

MFSA 2009-34 / CVE-2009-2462 / CVE-2009-2463 / CVE-2009-2464 / CVE-2009-2465 / CVE-2009-2466: Mozilla developers and community members identified and fixed several stability bugs in the browser engine used in Firefox and other Mozilla-based products. Some of these crashes showed evidence of memory corruption under certain circumstances and we presume that with enough effort at least some of these could be exploited to run arbitrary code.

MFSA 2009-35 / CVE-2009-2467: Security researcher Attila Suszter reported that when a page contains a Flash object which presents a slow script dialog, and the page is navigated while the dialog is still visible to the user, the Flash plugin is unloaded resulting in a crash due to a call to the deleted object. This crash could potentially be used by an attacker to run arbitrary code on a victim's computer.

MFSA 2009-36 / CVE-2009-1194: oCERT security researcher Will Drewry reported a series of heap and integer overflow vulnerabilities which independently affected multiple font glyph rendering libraries. On Linux platforms libpango was susceptible to the vulnerabilities while on OS X CoreGraphics was similarly vulnerable. An attacker could trigger these overflows by constructing a very large text run for the browser to display. Such an overflow can result in a crash which the attacker could potentially use to run arbitrary code on a victim's computer. The open-source nature of Linux meant that Mozilla was able to work with the libpango maintainers to implement the correct fix in version 1.24 of that system library which was distributed with OS security updates. On Mac OS X Firefox works around the CoreGraphics flaw by limiting the length of text runs passed to the system.

MFSA 2009-37 / CVE-2009-2469: Security researcher PenPal reported a crash involving a SVG element on which a watch function and
__defineSetter__ function have been set for a particular property. The crash showed evidence of memory corruption and could potentially be used by an attacker to run arbitrary code on a victim's computer.

MFSA 2009-39 / CVE-2009-2471: Mozilla developer Blake Kaplan reported that setTimeout, when called with certain object parameters which should be protected with a XPCNativeWrapper, will fail to keep the object wrapped when compiling the new function to be executed. If chrome privileged code were to call setTimeout using this as an argument, the this object will lose its wrapper and could be unsafely accessed by chrome code. An attacker could use such vulnerable code to run arbitrary JavaScript with chrome privileges.

MFSA 2009-40 / CVE-2009-2472: Mozilla security researcher moz_bug_r_a4 reported a series of vulnerabilities in which objects that normally receive a XPCCrossOriginWrapper are constructed without the wrapper.
This can lead to cases where JavaScript from one website may unsafely access properties of such an object which had been set by a different website. A malicious website could use this vulnerability to launch a XSS attack and run arbitrary JavaScript within the context of another site.

Updated firefox packages that fix several security issues are 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. 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 as the user running Firefox.
(CVE-2009-2462, CVE-2009-2463, CVE-2009-2464, CVE-2009-2465, CVE-2009-2466, CVE-2009-2467, CVE-2009-2469, CVE-2009-2471)

Several flaws were found in the way Firefox handles malformed JavaScript code. A website containing malicious content could launch a cross-site scripting (XSS) attack or execute arbitrary JavaScript with the permissions of another website. (CVE-2009-2472)

For technical details regarding these flaws, refer to the Mozilla security advisories for Firefox 3.0.12. You can find a link to the Mozilla advisories in the References section of this errata.

All Firefox users should upgrade to these updated packages, which contain Firefox version 3.0.12, which corrects these issues. After installing the update, Firefox must be restarted for the changes to take effect.

The Mozilla Firefox 3.0.12 release fixes various bugs and some critical security issues.

  - Mozilla developers and community members identified and     fixed several stability bugs in the browser engine used     in Firefox and other Mozilla-based products. Some of     these crashes showed evidence of memory corruption under     certain circumstances and we presume that with enough     effort at least some of these could be exploited to run     arbitrary code. (MFSA 2009-34 / CVE-2009-2462 /     CVE-2009-2463 / CVE-2009-2464 / CVE-2009-2465 /     CVE-2009-2466)

  - Security researcher Attila Suszter reported that when a     page contains a Flash object which presents a slow     script dialog, and the page is navigated while the     dialog is still visible to the user, the Flash plugin is     unloaded resulting in a crash due to a call to the     deleted object. This crash could potentially be used by     an attacker to run arbitrary code on a victim's     computer. (MFSA 2009-35 / CVE-2009-2467)

  - oCERT security researcher Will Drewry reported a series     of heap and integer overflow vulnerabilities which     independently affected multiple font glyph rendering     libraries. On Linux platforms libpango was susceptible     to the vulnerabilities while on OS X CoreGraphics was     similarly vulnerable. An attacker could trigger these     overflows by constructing a very large text run for the     browser to display. Such an overflow can result in a     crash which the attacker could potentially use to run     arbitrary code on a victim's computer. The open source     nature of Linux meant that Mozilla was able to work with     the libpango maintainers to implement the correct fix in     version 1.24 of that system library which was     distributed with OS security updates. On Mac OS X     Firefox works around the CoreGraphics flaw by limiting     the length of text runs passed to the system. (MFSA     2009-36 / CVE-2009-1194)

  - Security researcher PenPal reported a crash involving a     SVG element on which a watch function and
    __defineSetter__ function have been set for a particular     property. The crash showed evidence of memory corruption     and could potentially be used by an attacker to run     arbitrary code on a victim's computer. (MFSA 2009-37 /     CVE-2009-2469)

  - Mozilla developer Blake Kaplan reported that setTimeout,     when called with certain object parameters which should     be protected with a XPCNativeWrapper, will fail to keep     the object wrapped when compiling the new function to be     executed. If chrome privileged code were to call     setTimeout using this as an argument, the this object     will lose its wrapper and could be unsafely accessed by     chrome code. An attacker could use such vulnerable code     to run arbitrary JavaScript with chrome privileges.
    (MFSA 2009-39 / CVE-2009-2471)

  - Mozilla security researcher moz_bug_r_a4 reported a     series of vulnerabilities in which objects that normally     receive a XPCCrossOriginWrapper are constructed without     the wrapper. This can lead to cases where JavaScript     from one website may unsafely access properties of such     an object which had been set by a different website. A     malicious website could use this vulnerability to launch     a XSS attack and run arbitrary JavaScript within the     context of another site. (MFSA 2009-40 / CVE-2009-2472)

ID	名前	製品	ファミリー	公開日	更新日	深刻度
60618	Scientific Linux Security Update : firefox on SL4.x i386/x86_64	Nessus	Scientific Linux Local Security Checks	2012/8/1	2021/1/14	critical
63402	GLSA-201301-01 : Mozilla Products: Multiple vulnerabilities (BEAST)	Nessus	Gentoo Local Security Checks	2013/1/8	2025/10/6	critical
279141	Mozilla Firefox < 3.5	Nessus	MacOS X Local Security Checks	2025/12/18	2025/12/18	high
40404	openSUSE Security Update : MozillaFirefox (MozillaFirefox-1135)	Nessus	SuSE Local Security Checks	2009/7/28	2021/1/14	critical
43769	CentOS 5 : firefox (CESA-2009:1162)	Nessus	CentOS Local Security Checks	2010/1/6	2021/1/4	critical
60619	Scientific Linux Security Update : firefox on SL5.x i386/x86_64	Nessus	Scientific Linux Local Security Checks	2012/8/1	2021/1/14	critical
41357	SuSE 11 Security Update : MozillaFirefox (SAT Patch Number 1134)	Nessus	SuSE Local Security Checks	2009/9/24	2021/1/14	critical
62808	Scientific Linux Security Update : firefox on SL4.x i386/x86_64	Nessus	Scientific Linux Local Security Checks	2012/11/5	2021/1/14	critical

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