USN-930-4: Firefox and Xulrunner vulnerabilities

23 July 2010

Firefox could be made to run programs as your login if it opened a specially crafted file or website.

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USN-930-1 fixed vulnerabilities in Firefox and Xulrunner. This update
provides the corresponding updates for Ubuntu 9.04 and 9.10, along with
additional updates affecting Firefox 3.6.6.

Several flaws were discovered in the browser engine of Firefox. If a user
were tricked into viewing a malicious site, a remote attacker could use
this to crash the browser or possibly run arbitrary code as the user
invoking the program. (CVE-2010-1208, CVE-2010-1209, CVE-2010-1211,
CVE-2010-1212)

An integer overflow was discovered in how Firefox processed plugin
parameters. An attacker could exploit this to crash the browser or possibly
run arbitrary code as the user invoking the program. (CVE-2010-1214)

A flaw was discovered in the Firefox JavaScript engine. If a user were
tricked into viewing a malicious site, a remote attacker code execute
arbitrary JavaScript with chrome privileges. (CVE-2010-1215)

An integer overflow was discovered in how Firefox processed CSS values. An
attacker could exploit this to crash the browser or possibly run arbitrary
code as the user invoking the program. (CVE-2010-2752)

An integer overflow was discovered in how Firefox interpreted the XUL

element. If a user were tricked into viewing a malicious site, a
remote attacker could use this to crash the browser or possibly run
arbitrary code as the user invoking the program. (CVE-2010-2753)

Aki Helin discovered that libpng did not properly handle certain malformed
PNG images. If a user were tricked into opening a crafted PNG file, an
attacker could cause a denial of service or possibly execute arbitrary code
with the privileges of the user invoking the program. (CVE-2010-1205)

Yosuke Hasegawa and Vladimir Vukicevic discovered that the same-origin
check in Firefox could be bypassed by utilizing the importScripts Web
Worker method. If a user were tricked into viewing a malicious website, an
attacker could exploit this to read data from other domains.
(CVE-2010-1213, CVE-2010-1207)

O. Andersen that Firefox did not properly map undefined positions within
certain 8 bit encodings. An attacker could utilize this to perform
cross-site scripting attacks. (CVE-2010-1210)

Michal Zalewski discovered flaws in how Firefox processed the HTTP 204 (no
content) code. An attacker could exploit this to spoof the location bar,
such as in a phishing attack. (CVE-2010-1206)

Jordi Chancel discovered that Firefox did not properly handle when a server
responds to an HTTPS request with plaintext and then processes JavaScript
history events. An attacker could exploit this to spoof the location bar,
such as in a phishing attack. (CVE-2010-2751)

Chris Evans discovered that Firefox did not properly process improper CSS
selectors. If a user were tricked into viewing a malicious website, an
attacker could exploit this to read data from other domains.
(CVE-2010-0654)

Soroush Dalili discovered that Firefox did not properly handle script error
output. An attacker could use this to access URL parameters from other
domains. (CVE-2010-2754)

Original advisory details:

If was discovered that Firefox could be made to access freed memory. If a
user were tricked into viewing a malicious site, a remote attacker could
cause a denial of service or possibly execute arbitrary code with the
privileges of the user invoking the program. (CVE-2010-1121)

Several flaws were discovered in the browser engine of Firefox. If a
user were tricked into viewing a malicious site, a remote attacker could
cause a denial of service or possibly execute arbitrary code with the
privileges of the user invoking the program. (CVE-2010-1200, CVE-2010-1201,
CVE-2010-1202, CVE-2010-1203)

A flaw was discovered in the way plugin instances interacted. An attacker
could potentially exploit this and use one plugin to access freed memory from a
second plugin to execute arbitrary code with the privileges of the user
invoking the program. (CVE-2010-1198)

An integer overflow was discovered in Firefox. If a user were tricked into
viewing a malicious site, an attacker could overflow a buffer and cause a
denial of service or possibly execute arbitrary code with the privileges of
the user invoking the program. (CVE-2010-1196)

Martin Barbella discovered an integer overflow in an XSLT node sorting
routine. An attacker could exploit this to overflow a buffer and cause a
denial of service or possibly execute arbitrary code with the privileges of
the user invoking the program. (CVE-2010-1199)

Michal Zalewski discovered that the focus behavior of Firefox could be
subverted. If a user were tricked into viewing a malicious site, a remote
attacker could use this to capture keystrokes. (CVE-2010-1125)

Ilja van Sprundel discovered that the 'Content-Disposition: attachment'
HTTP header was ignored when 'Content-Type: multipart' was also present.
Under certain circumstances, this could potentially lead to cross-site
scripting attacks. (CVE-2010-1197)

Amit Klein discovered that Firefox did not seed its random number generator
often enough. An attacker could exploit this to identify and track users
across different web sites. (CVE-2008-5913)

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Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 9.10
Ubuntu 9.04

Mozilla has changed the support model for Firefox and they no longer
support version 3.0 of the browser and will only support version 3.5 of the
browser for a while longer. As a result, Ubuntu is providing an upgrade to
Firefox 3.6 for Ubuntu 9.04 and 9.10 users, which is the most current
stable release of Firefox supported by Mozilla. When upgrading, users
should be aware of the following:

  • Firefox 3.6 does not support version 5 of the Sun Java plugin. Please use
    icedtea6-plugin or sun-java6-plugin instead.
  • After upgrading to Firefox 3.6.6, users may be prompted to upgrade 3rd
    party Add-Ons. In some cases, an Add-On will not be compatible with
    Firefox 3.6.6 and have no update available. In these cases, Firefox will
    notify the user that it is disabling the Add-On.
  • Font configuration cannot be controlled via Gnome settings. This is a
    known issue being tracked in https://launchpad.net/bugs/559149 and will
    be fixed in a later update.
  • helix-player is not currently supported in Firefox 3.6. This is a known
    issue and may be fixed in a future update.
  • Plugins using external helpers (such as Totem) may not close when using
    the Epiphany browser. This is a known issue being tracked in
    https://launchpad.net/bugs/599796 and will be fixed in a later update.
    This issue only affects Ubuntu 9.04.
  • The OpenJDK java plugin is not available in Ubuntu 9.04 on Sparc
    hardware. This will be fixed in a future update.

After a standard system upgrade you need to restart Firefox and any
applications that use Xulrunner to effect the necessary changes.

References

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