Date: 02 March 2005
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AUSCERT External Security Bulletin Redistribution
ESB-2005.0196 -- RHSA-2005:176-01
Critical: firefox security update
2 March 2005
AusCERT Security Bulletin Summary
Product: Mozilla Firefox 1.0 and prior
Publisher: Red Hat
Operating System: UNIX variants
Mac OS X
Impact: Execute Arbitrary Code/Commands
Provide Misleading Information
Access Privileged Data
CVE Names: CAN-2005-0593 CAN-2005-0592 CAN-2005-0591
CAN-2005-0590 CAN-2005-0589 CAN-2005-0588
CAN-2005-0586 CAN-2005-0585 CAN-2005-0584
CAN-2005-0578 CAN-2005-0527 CAN-2005-0255
CAN-2005-0233 CAN-2005-0232 CAN-2005-0231
Original Bulletin: https://rhn.redhat.com/errata/RHSA-2005-176.html
Comment: Mozilla Firefox version 1.0.1 is not vulnerable to these problems. To
upgrade your version of Firefox, either follow the instructions in
this bulletin or go to:
and select the appropriate installer for your operating system.
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Red Hat Security Advisory
Synopsis: Critical: firefox security update
Advisory ID: RHSA-2005:176-01
Advisory URL: https://rhn.redhat.com/errata/RHSA-2005-176.html
Issue date: 2005-03-01
Updated on: 2005-03-01
Product: Red Hat Enterprise Linux
CVE Names: CAN-2004-1156 CAN-2005-0231 CAN-2005-0232 CAN-2005-0233 CAN-2005-0255 CAN-2005-0527 CAN-2005-0578 CAN-2005-0584 CAN-2005-0585 CAN-2005-0586 CAN-2005-0588 CAN-2005-0589 CAN-2005-0590 CAN-2005-0591 CAN-2005-0592 CAN-2005-0593
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Updated firefox packages that fix various bugs are now available.
This update has been rated as having critical security impact by the Red
Hat Security Response Team.
2. Relevant releases/architectures:
Red Hat Enterprise Linux AS version 4 - i386, ia64, ppc, s390, s390x, x86_64
Red Hat Enterprise Linux Desktop version 4 - i386, x86_64
Red Hat Enterprise Linux ES version 4 - i386, ia64, x86_64
Red Hat Enterprise Linux WS version 4 - i386, ia64, x86_64
3. Problem description:
Mozilla Firefox is an open source Web browser.
A bug was found in the Firefox string handling functions. If a malicious
website is able to exhaust a system's memory, it becomes possible to
execute arbitrary code. The Common Vulnerabilities and Exposures project
(cve.mitre.org) has assigned the name CAN-2005-0255 to this issue.
A bug was found in the way Firefox handles pop-up windows. It is possible
for a malicious website to control the content in an unrelated site's
pop-up window. (CAN-2004-1156)
A bug was found in the way Firefox allows plug-ins to load privileged
content into a frame. It is possible that a malicious webpage could trick a
user into clicking in certain places to modify configuration settings or
execute arbitrary code. (CAN-2005-0232 and CAN-2005-0527).
A flaw was found in the way Firefox displays international domain names. It
is possible for an attacker to display a valid URL, tricking the user into
thinking they are viewing a legitimate webpage when they are not.
A bug was found in the way Firefox handles plug-in temporary files. A
malicious local user could create a symlink to a victims directory, causing
it to be deleted when the victim exits Firefox. (CAN-2005-0578)
A bug has been found in one of Firefox's UTF-8 converters. It may be
possible for an attacker to supply a specially crafted UTF-8 string to the
buggy converter, leading to arbitrary code execution. (CAN-2005-0592)
which could result in remote code execution or information disclosure.
A bug was found in the way Firefox displays the HTTP authentication prompt.
When a user is prompted for authentication, the dialog window is displayed
over the active tab, regardless of the tab that caused the pop-up to appear
and could trick a user into entering their username and password for a
trusted site. (CAN-2005-0584)
A bug was found in the way Firefox displays the save file dialog. It is
possible for a malicious webserver to spoof the Content-Disposition header,
tricking the user into thinking they are downloading a different filetype.
A bug was found in the way Firefox handles users "down-arrow" through auto
completed choices. When an autocomplete choice is selected, the information
is copied into the input control, possibly allowing a malicious web site to
steal information by tricking a user into arrowing through autocompletion
Several bugs were found in the way Firefox displays the secure site icon.
It is possible that a malicious website could display the secure site icon
along with incorrect certificate information. (CAN-2005-0593)
A bug was found in the way Firefox displays the download dialog window. A
malicious site can obfuscate the content displayed in the source field,
tricking a user into thinking they are downloading content from a trusted
A bug was found in the way Firefox handles xsl:include and xsl:import
directives. It is possible for a malicious website to import XSLT
stylesheets from a domain behind a firewall, leaking information to an
A bug was found in the way Firefox displays the installation confirmation
dialog. An attacker could add a long user:pass before the true hostname,
tricking a user into thinking they were installing content from a trusted
A bug was found in the way Firefox displays download and security dialogs.
An attacker could cover up part of a dialog window tricking the user into
clicking "Allow" or "Open", which could potentially lead to arbitrary code
Users of Firefox are advised to upgrade to this updated package which
contains Firefox version 1.0.1 and is not vulnerable to these issues.
Before applying this update, make sure that all previously-released
errata relevant to your system have been applied. Use Red Hat
Network to download and update your packages. To launch the Red Hat
Update Agent, use the following command:
For information on how to install packages manually, refer to the
following Web page for the System Administration or Customization
guide specific to your system:
5. Bug IDs fixed (http://bugzilla.redhat.com/):
147727 - CAN-2005-0232 fireflashing vulnerability (CAN-2005-0527)
149876 - CAN-2005-0255 Memory overwrite in string library
147402 - CAN-2005-0233 homograph spoofing
142506 - CAN-2004-1156 Frame injection vulnerability.
144216 - CAN-2005-0585 download dialog URL spoofing
149923 - CAN-2005-0578 Unsafe /tmp/plugtmp directory exploitable to erase user's files
149929 - CAN-2005-0584 HTTP auth prompt tab spoofing
149930 - CAN-2005-0586 Download dialog spoofing using Content-Disposition header
149931 - CAN-2005-0588 XSLT can include stylesheets from arbitrary hosts
149934 - CAN-2005-0589 Autocomplete data leak
149936 - CAN-2005-0590 Install source spoofing with user:pass@host
149937 - CAN-2005-0591 Spoofing download and security dialogs with overlapping windows
149938 - CAN-2005-0592 Heap overflow possible in UTF8 to Unicode conversion
149939 - CAN-2005-0593 SSL "secure site" indicator spoofing
6. RPMs required:
Red Hat Enterprise Linux AS version 4:
Red Hat Enterprise Linux Desktop version 4:
Red Hat Enterprise Linux ES version 4:
Red Hat Enterprise Linux WS version 4:
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
The Red Hat security contact is <firstname.lastname@example.org>. More contact
details at https://www.redhat.com/security/team/contact/
Copyright 2005 Red Hat, Inc.
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