Critical: firefox security update

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-2009-1392, CVE-2009-1832, CVE-2009-1833, CVE-2009-1837, CVE-2009-1838,
CVE-2009-1841)

Multiple flaws were found in the processing of malformed, local file
content. If a user loaded malicious, local content via the file:// URL, it
was possible for that content to access other local data. (CVE-2009-1835,
CVE-2009-1839)

A script, privilege elevation flaw was found in the way Firefox loaded XML
User Interface Language (XUL) scripts. Firefox and certain add-ons could
load malicious content when certain policy checks did not happen.
(CVE-2009-1840)

A flaw was found in the way Firefox displayed certain Unicode characters in
International Domain Names (IDN). If an IDN contained invalid characters,
they may have been displayed as spaces, making it appear to the user that
they were visiting a trusted site. (CVE-2009-1834)

A flaw was found in the way Firefox handled error responses returned from
proxy servers. If an attacker is able to conduct a man-in-the-middle attack
against a Firefox instance that is using a proxy server, they may be able
to steal sensitive information from the site the user is visiting.
(CVE-2009-1836)

For technical details regarding these flaws, refer to the Mozilla security
advisories for Firefox 3.0.11. 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 3.0.11, which corrects these issues. After installing the
update, Firefox must be restarted for the changes to take effect.

Before applying this update, make sure that all previously-released
errata relevant to your system have been applied.

This update is available via Red Hat Network. Details on how to use
the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/docs/DOC-11259

488570 - frequent firefox crashes against clearspace
503568 - CVE-2009-1392 Firefox browser engine crashes
503569 - CVE-2009-1832 Firefox double frame construction flaw
503570 - CVE-2009-1833 Firefox JavaScript engine crashes
503573 - CVE-2009-1834 Firefox URL spoofing with invalid unicode characters
503576 - CVE-2009-1835 Firefox Arbitrary domain cookie access by local file: resources
503578 - CVE-2009-1836 Firefox SSL tampering via non-200 responses to proxy CONNECT requests
503579 - CVE-2009-1837 Firefox Race condition while accessing the private data of a NPObject JS wrapper class object
503580 - CVE-2009-1838 Firefox arbitrary code execution flaw
503581 - CVE-2009-1839 Firefox information disclosure flaw
503582 - CVE-2009-1840 Firefox XUL scripts skip some security checks
503583 - CVE-2009-1841 Firefox JavaScript arbitrary code execution

https://www.redhat.com/security/data/cve/CVE-2009-1392.html
https://www.redhat.com/security/data/cve/CVE-2009-1832.html
https://www.redhat.com/security/data/cve/CVE-2009-1833.html
https://www.redhat.com/security/data/cve/CVE-2009-1834.html
https://www.redhat.com/security/data/cve/CVE-2009-1835.html
https://www.redhat.com/security/data/cve/CVE-2009-1836.html
https://www.redhat.com/security/data/cve/CVE-2009-1837.html
https://www.redhat.com/security/data/cve/CVE-2009-1838.html
https://www.redhat.com/security/data/cve/CVE-2009-1839.html
https://www.redhat.com/security/data/cve/CVE-2009-1840.html
https://www.redhat.com/security/data/cve/CVE-2009-1841.html
http://www.redhat.com/security/updates/classification/#critical
http://www.mozilla.org/security/known-vulnerabilities/firefox30.html#firefox3.0.11