RedHat Security Advisory RHSA-2009:1674

The remote host is missing updates announced in advisory RHSA-2009:1674. 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 with the privileges of the user running Firefox. (CVE-2009-3979, CVE-2009-3981, CVE-2009-3986) A flaw was found in the Firefox NT Lan Manager (NTLM) authentication protocol implementation. If an attacker could trick a local user that has NTLM credentials into visiting a specially-crafted web page, they could send arbitrary requests, authenticated with the user's NTLM credentials, to other applications on the user's system. (CVE-2009-3983) A flaw was found in the way Firefox displayed the SSL location bar indicator. An attacker could create an unencrypted web page that appears to be encrypted, possibly tricking the user into believing they are visiting a secure page. (CVE-2009-3984) A flaw was found in the way Firefox displayed blank pages after a user navigates to an invalid address. If a user visits an attacker-controlled web page that results in a blank page, the attacker could inject content into that blank page, possibly tricking the user into believing they are viewing a legitimate page. (CVE-2009-3985) For technical details regarding these flaws, refer to the Mozilla security advisories for Firefox 3.0.16. 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 3.0.16, which corrects these issues. After installing the update, Firefox must be restarted for the changes to take effect.
Please note that this update is available via Red Hat Network. To use Red Hat Network, launch the Red Hat Update Agent with the following command: up2date