Integer overflow in the pango_glyph_string_set_size function in pango/glyphstring.c in Pango before 1.24 allows context-dependent attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a long glyph string that triggers a heap-based buffer overflow, as demonstrated by a long document.location value in Firefox.

The remote host is affected by the vulnerability described in GLSA-201405-13 (Pango: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in Pango. Please review       the CVE identifiers referenced below for details.
  Impact :

    A context-dependent attacker could entice a user to load specially       crafted text using an application linked against Pango, possibly       resulting in execution of arbitrary code with the privileges of the       process or a Denial of Service condition.
  Workaround :

    There is no known workaround at this time.

The remote Oracle Linux 5 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2009-0476 advisory.

    [1.14.9-4]
    - Add pango-glyphstring.patch
    - Resolves: #497361

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

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

Will Drewry discovered an integer overflow flaw in Pango's pango_glyph_string_set_size() function. If an attacker is able to pass an arbitrarily long string to Pango, it may be possible to execute arbitrary code with the permissions of the application calling Pango.
(CVE-2009-1194)

After installing this update, you must restart your system or restart the X server for the update to take effect. Note: Restarting the X server closes all open applications and logs you out of your session.

Long glyph string could trigger a heap-based buffer overflow in pango.
(CVE-2009-1194)

A long glyph string can trigger a heap-based buffer overflow in pango.
(CVE-2009-1194)

Long glyph string could trigger a heap-based buffer overflow in pango (CVE-2009-1194).

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 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.

This update of pango fixes a segfault in libpango that can be triggered by visiting websites. (CVE-2009-1194)

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)

Versions of Firefox prior to 3.0.12 are affected by the following security issues :

 - Multiple memory corruption vulnerabilities could potentially be exploited to execute arbitrary code. (MFSA 2009-34)
 - It may be possible to crash the browser or potentially execute arbitrary code by using a flash object that presents a slow script dialog. (MFSA 2009-35)
 - Glyph rendering libraries are affected by multiple heap/integer overflows. (MFSA 2009-36)
 - A vulnerability involving SVG element could be exploited to crash the browser or execute arbitrary code on the remote system. (MFSA 2009-37)
 - A vulnerability in 'setTimeout' could allow unsafe access to the 'this' object from chrome code. An attacker could exploit this flaw to run arbitrary JavaScript with chrome privileges. (MFSA 2009-39)
 - It may be possible for JavaScript from one website to bypass cross-origin wrapper, and unsafely access properties of an object from another website. (MFSA 2009-40)  

Integer overflow in the pango_glyph_string_set_size function in pango/glyphstring.c in Pango before 1.24 allows context-dependent attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a long glyph string that triggers a heap-based buffer overflow.

This update corrects the issue.

Update :

Packages for 2008.0 are provided for Corporate Desktop 2008.0 customers

The installed version of Firefox is earlier than 3.0.12. Such versions are potentially affected by the following security issues :

  - Multiple memory corruption vulnerabilities could     potentially be exploited to execute arbitrary code.     (MFSA 2009-34)

  - It may be possible to crash the browser or potentially     execute arbitrary code by using a flash object that     presents a slow script dialog. (MFSA 2009-35) 

  - Glyph rendering libraries are affected by multiple heap/     integer overflows. (MFSA 2009-36)

  - A vulnerability involving SVG element could be exploited     to crash the browser or execute arbitrary code on the     remote system. (MFSA 2009-37)

  - A SOCKS5 proxy that replies with a hostname containing     more than 15 characters can corrupt the subsequent     data stream.  This can lead to a denial of service,     though there is reportedly no memory corruption.
    (MFSA 2009-38)

  - A vulnerability in 'setTimeout' could allow unsafe     access to the 'this' object from chrome code. An     attacker could exploit this flaw to run arbitrary     JavaScript with chrome privileges. (MFSA 2009-39)

  - It may be possible for JavaScript from one website     to bypass cross origin wrapper, and unsafely access     properties of an object from another website.
    (MFSA 2009-40)

oCERT reports :

Pango suffers from a multiplicative integer overflow which may lead to a potentially exploitable, heap overflow depending on the calling conditions.

For example, this vulnerability is remotely reachable in Firefox by creating an overly large document.location value but only results in a process-terminating, allocation error (denial of service).

The affected function is pango_glyph_string_set_size. An overflow check when doubling the size neglects the overflow possible on the subsequent allocation.

Updated pango and evolution28-pango packages that fix an integer overflow flaw are now available for Red Hat Enterprise Linux 3, 4, and 5.

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

Pango is a library used for the layout and rendering of internationalized text.

Will Drewry discovered an integer overflow flaw in Pango's pango_glyph_string_set_size() function. If an attacker is able to pass an arbitrarily long string to Pango, it may be possible to execute arbitrary code with the permissions of the application calling Pango.
(CVE-2009-1194)

pango and evolution28-pango users are advised to upgrade to these updated packages, which contain a backported patch to resolve this issue. After installing this update, you must restart your system or restart the X server for the update to take effect. Note: Restarting the X server closes all open applications and logs you out of your session.

Will Drewry discovered that pango, a system for layout and rendering of internationalized text, is prone to an integer overflow via long glyphstrings. This could cause the execution of arbitrary code when displaying crafted data through an application using the pango library.

Will Drewry discovered that Pango incorrectly handled rendering text with long glyphstrings. If a user were tricked into displaying specially crafted data with applications linked against Pango, such as Firefox, an attacker could cause a denial of service or execute arbitrary code with privileges of the user invoking the program.

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.

ID	Name	Product	Family	Severity
74056	GLSA-201405-13 : Pango: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	critical
67856	Oracle Linux 5 : pango (ELSA-2009-0476)	Nessus	Oracle Linux Local Security Checks	critical
60582	Scientific Linux Security Update : pango on SL3.x, SL4.x, SL5.x i386/x86_64	Nessus	Scientific Linux Local Security Checks	medium
50080	SuSE 10 Security Update : firefox3-pango (ZYPP Patch Number 7097)	Nessus	SuSE Local Security Checks	medium
49911	SuSE 10 Security Update : pango (ZYPP Patch Number 6800)	Nessus	SuSE Local Security Checks	medium
44614	openSUSE Security Update : pango (pango-1829)	Nessus	SuSE Local Security Checks	medium
44609	openSUSE Security Update : pango (pango-1829)	Nessus	SuSE Local Security Checks	medium
44593	SuSE 10 Security Update : pango (ZYPP Patch Number 6801)	Nessus	SuSE Local Security Checks	medium
44592	SuSE 11 Security Update : pango (SAT Patch Number 1880)	Nessus	SuSE Local Security Checks	medium
44591	SuSE9 Security Update : pango (YOU Patch Number 12575)	Nessus	SuSE Local Security Checks	medium
43769	CentOS 5 : firefox (CESA-2009:1162)	Nessus	CentOS Local Security Checks	critical
41983	openSUSE 10 Security Update : MozillaFirefox (MozillaFirefox-6379)	Nessus	SuSE Local Security Checks	critical
41447	SuSE 11 Security Update : pango (SAT Patch Number 825)	Nessus	SuSE Local Security Checks	medium
41357	SuSE 11 Security Update : MozillaFirefox (SAT Patch Number 1134)	Nessus	SuSE Local Security Checks	critical
5101	Mozilla Firefox < 3.0.12 Multiple Vulnerabilities	Nessus Network Monitor	Web Clients	medium
40404	openSUSE Security Update : MozillaFirefox (MozillaFirefox-1135)	Nessus	SuSE Local Security Checks	critical
40403	openSUSE Security Update : MozillaFirefox (MozillaFirefox-1135)	Nessus	SuSE Local Security Checks	critical
40359	Mandriva Linux Security Advisory : pango (MDVSA-2009:158-3)	Nessus	Mandriva Local Security Checks	medium
40351	Firefox < 3.0.12 Multiple Vulnerabilities	Nessus	Windows	high
40340	RHEL 4 / 5 : firefox (RHSA-2009:1162)	Nessus	Red Hat Local Security Checks	critical
40294	openSUSE Security Update : pango (pango-824)	Nessus	SuSE Local Security Checks	medium
38751	FreeBSD : pango -- integer overflow (4b172278-3f46-11de-becb-001cc0377035)	Nessus	FreeBSD Local Security Checks	medium
38732	RHEL 3 / 4 / 5 : pango (RHSA-2009:0476)	Nessus	Red Hat Local Security Checks	medium
38725	Debian DSA-1798-1 : pango1.0 - integer overflow	Nessus	Debian Local Security Checks	medium
38721	CentOS 3 / 4 / 5 : pango (CESA-2009:0476)	Nessus	CentOS Local Security Checks	medium
38716	Ubuntu 6.06 LTS / 8.04 LTS / 8.10 : pango1.0 vulnerability (USN-773-1)	Nessus	Ubuntu Local Security Checks	medium

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